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The Canadian forestry industry is a major contributor to the Canadian economy. With 39% of Canada's land acreage covered by forests, the country contains 9% of the world's forested land. The forests are made up primarily of spruce, poplar and pine. The Canadian forestry industry is composed of three main sectors: solid wood manufacturing, pulp and paper and logging. Forests, as well as forestry are managed by The Department of Natural Resources Canada and the Canadian Forest Service, in cooperation with several organizations which represent government groups, officials, policy experts, and numerous other stakeholders. Extensive deforestation by European settlers during the 18th and 19th centuries has been halted by more modern policies. Today, less than 1% of Canada's forests are affected by logging each year. Canada is the 2nd largest exporter of wood products, and produces 12.3% of the global market share. Economic concerns related to forestry include greenhouse gas emissions, biotechnology, biological diversity, and infestation by pests such as the mountain pine beetle. (Full article...) Weed control is a type of pest control, which attempts to stop or reduce growth of weeds, especially noxious weeds, with the aim of reducing their competition with desired flora and fauna including domesticated plants and livestock, and in natural settings preventing non native species competing with native species. Weed control is important in agriculture. Methods include hand cultivation with hoes, powered cultivation with cultivators, smothering with mulch, lethal wilting with high heat, burning, and chemical control with herbicides (weed killers). (Full article...) A feller buncher is a type of harvester used in logging. It is a motorized vehicle with an attachment that can rapidly gather and cut a tree before felling it. Feller is a traditional name for someone who cuts down trees, and bunching is the skidding and assembly of two or more trees. A feller buncher performs both of these harvesting functions and consists of a standard heavy equipment base with a tree-grabbing device furnished with a chain-saw, circular saw or a shear—a pinching device designed to cut small trees off at the base. The machine then places the cut tree on a stack suitable for a skidder, forwarder, or yarder for transport to further processing such as delimbing, bucking, loading, or chipping. Some wheeled feller bunchers lack an articulated arm, and must drive close to a tree to grasp it. In cut-to-length logging a harvester performs the tasks of a feller buncher and additionally does delimbing and bucking. (Full article...) The relascope, invented by Walter Bitterlich, is a multi-use instrument for forest inventory. It is primarily used to find the height of a tree, the basal area of a tree, and the diameter of a tree anywhere along the bole. This instrument is used mostly for applications involving variable radius sample plots in a forest survey. (Full article...) Taiga Rescue Network (TRN) was an international network of more than 200 non-governmental organizations, indigenous peoples and individuals working to defend the world's boreal forests, also known as Taiga. TRN was established in 1992 to give a voice to support, link and publicize local struggles fighting for the boreal forests and its peoples. TRN no longer exists. In 2010, TRN held its last conference in Sweden. The website remained online until April 2013. (Full article...) The General Revision Act (sometimes Land Revision Act) of 1891, also known as the Forest Reserve Act of 1891, was a federal law signed in 1891 by President Benjamin Harrison. The Act reversed previous policy initiatives, such as the Timber Culture Act of 1873, which did not preclude land fraud by wealthy individuals and corporations. The acquisition of vast mineral and timber resources in the Western United States was often cited as a governing motive for such individuals and corporations to claim land rights for future settlement and resource depletion activities. The legacy of the General Revision Act of 1891 is frequently credited as its serving as a catalyst to a series of federal land reform initiatives, notably under President Theodore Roosevelt. From the Reclamation Act of 1902 to the formation of the United States Forest Service in 1905, the General Revision Act of 1891 acted as a critical first piece of federal legislation granting increased plots of publicly allotted land and decreased extraction rights to privately held western land owners in the early 20th century. The law gives the President of the United States the authority to unilaterally set aside forest reserves from land in the public domain. After newspapers began to publicize the fraud and speculation under the previous Timber Culture Act of 1873 that granted additional land to homesteaders agreeing to plant trees, scientists of the American Association for the Advancement of Science (AAAS) joined with the American Forestry Association to advocate for stronger laws for the management of the nation's forest land. The resulting act, passed by the 51st United States Congress and signed into law by President Benjamin Harrison on March 3, 1891, set out to both protect local watersheds from flooding and erosion as well as to prevent over-exploitation of the country's timber supply. Under the act, President Harrison issued proclamations establishing 13 million acres (53,000 km2) of land as forest reserves; President Grover Cleveland proclaimed 25 million acres (100,000 km2) and President William McKinley 7 million acres (28,000 km2). In 1907 a law was passed limiting presidential authority to designate forest reserves in certain states and renamed the existing "forest reserves" as "national forests". (Full article...) Diameter at breast height, or DBH, is a standard method of expressing the diameter of the trunk or bole of a standing tree. DBH is one of the most common dendrometric measurements. Tree trunks are measured at the height of an adult's breast, which is defined differently in different countries and situations. In many countries, DBH is measured at approximately 1.3 m (4.3 ft) above ground. (Full article...) The Korea Forest Service is a central administrative agency under the Ministry of Agriculture, Food and Rural Affairs (MAFR), responsible for protecting and nurturing forests, increasing forest resources, developing forest products, conducting research on forest management and improvement, and is located in Daejeon Government Complex. In the past, during the national forestation campaign from 1973 to 1986, it was temporarily under the Ministry of Home Affairs (now the Ministry of the Interior and Safety), but returned to the Ministry of Agriculture, Forestry and Fisheries in 1987. However, as the agency's work was focused solely on maintaining and managing successful national forestation policies, questions were raised about its necessity for a period of time. Currently, the agency has transformed its identity into one that strives to generate continuous income through forest resources. It is one of the government agencies that is highly likely to expand in the event of future North-South unification. In North Korea, there are many mountains, and it is expected that regional forest offices will be expanded to promote afforestation projects centering around Mount Mindungsan. The Korea National Park Service, which is under the Ministry of Environment, had a long-standing conflict with the Korea Forest Service. Both agencies are in charge of forest-related work, but there were frequent conflicts due to differences in specific business objectives. While the Korea Forest Service also invests in forest development to promote forestry, the Korea National Park Service's primary objective is forest protection. Therefore, in 2012, an article was published between the two organization called "Let's Get Along." Furthermore, it has a cooperative relationship with the Cultural Heritage Administration. High-quality lumber is essential for restoring, maintaining, and repairing traditional cultural properties, and in particular, Korean pine, also known as the "Geumgang Pine," is still a rare species. Therefore, the Korea Forest Service and the Cultural Heritage Administration are working together to create and manage Geumgang Pine plantations. The current head of the organization is Nam Sung-hyun, who began his term in May 2022. (Full article...) Paperboard is a thick paper-based material. While there is no rigid differentiation between paper and paperboard, paperboard is generally thicker (usually over 0.30 mm, 0.012 in, or 12 points) than paper and has certain superior attributes such as foldability and rigidity. According to ISO standards, paperboard is a paper with a grammage above 250 g/m2, but there are exceptions. Paperboard can be single- or multi-ply. Paperboard can be easily cut and formed, is lightweight, and because it is strong, is used in packaging. Another end-use is high quality graphic printing, such as book and magazine covers or postcards. Paperboard is also used in fine arts for creating sculptures. Sometimes it is referred to as cardboard, which is a generic, lay term used to refer to any heavy paper pulp–based board, however this usage is deprecated in the paper, printing, and packaging industries as it does not adequately describe each product type. (Full article...) The following is a list of widely known trees and shrubs. Taxonomic families for the following trees and shrubs are listed in alphabetical order, likewise the genera and closely related species. The list currently includes 1352 species. (Full article...) Community forestry is an evolving branch of forestry whereby the local community plays a significant role in forest management and land use decision making by themselves in the facilitating support of government as well as change agents. It involves the participation and collaboration of various stakeholders including community, government and non-governmental organisations (NGOs). The level of involvement of each of these groups is dependent on the specific community forest project, the management system in use and the region. It gained prominence in the mid-1970s and examples of community forestry can now be seen in many countries including Nepal, Indonesia, Korea, Brazil, India, Sri Lanka and North America. (Full article...) Reforestation is the practice of restoring previously existing forests and woodlands that have been destroyed or damaged. The prior forest destruction might have happened through deforestation, clearcutting or wildfires. Two important purposes of reforestation programs are for harvesting of wood or for climate change mitigation purposes. Reforestation can also help with ecosystem restoration. One method for reforestation is to establish tree plantations, also called plantation forests. They cover about 131 million ha worldwide, which is 3% of the global forest area and 45% of the total area of planted forests. Globally, planted forests increased from 4.1% to 7.0% of the total forest area between 1990 and 2015. Plantation forests made up 280 million ha (hectare) in 2015, an increase of about 40 million ha in the last ten years. Globally, planted forests consist of about 18% exotic or introduced species while the rest are species native to the country where they are planted. There are limitations and challenges with reforestation projects, especially if they are in the form of tree plantations. Firstly, there can be competition with other land uses and displacement risk. Secondly, tree plantations are often monocultures which comes with a set of disadvantages, for example biodiversity loss. Lastly, there is also the problem that stored carbon is released at some point. The effects of reforestation and afforestation will be farther in the future than those of proforestation (the conservation of intact forests). Instead of planting entirely new areas, it might be better to reconnect forested areas and restoring the edges of forest. This protects their mature core and makes them more resilient and longer-lasting. It takes much longer − several decades − for the carbon sequestration benefits of reforestation to become similar to the those from mature trees in tropical forests. Therefore, reducing deforestation is usually more beneficial for climate change mitigation than reforestation. Many countries carry out reforestation programs. For example, in China, the Three Northern Protected Forest Development Program – informally known as the "Great Green Wall" – was launched in 1978 and scheduled to last until 2050. It aims to eventually plant nearly 90 million acres of new forest in a 2,800-mile stretch of northern China. (Full article...) Felling is the process of cutting down trees, an element of the task of logging. The person cutting the trees is a lumberjack. A feller buncher is a machine capable of felling a single large tree or grouping and felling several small ones simultaneously. (Full article...) A log flume is a watertight flume constructed to transport lumber and logs down mountainous terrain using flowing water. Flumes replaced horse- or oxen-drawn carriages on dangerous mountain trails in the late 19th century. Logging operations preferred flumes whenever a reliable source of water was available. Flumes were cheaper to build and operate than logging railroads. They could span long distances across chasms with more lightweight trestles. Flumes remained in widespread use through the early 20th century. The logging truck replaced both the logging railroad and the flume after WWII. Today, log flumes remain in the popular imagination as amusement park rides. (Full article...) The World Rainforest Movement (WRM) is an international initiative created to strengthen the global movement in defense of forests, in order to fight deforestation and forest degradation. It was founded in 1986 by activists from around the world. WRM believes that this goal can only be achieved by fighting for social and ecological justice, by respecting the collective rights of traditional communities and the right to self-determination of peoples who depend on the forests for their livelihoods. For this reason, WRM's actions are oriented to support the struggles of indigenous peoples and peasant communities in defense of their territories. WRM's International Secretariat is composed of a small team with members from different countries. The head office is in Uruguay. (Full article...) Forest now covers less than a third of Turkey, but ten thousand years ago the land was mostly wooded. The country is reforesting, which is important for the wildlife of Turkey. (Full article...) Temperate rainforests are rainforests with coniferous or broadleaf forests that occur in the temperate zone and receive heavy rain. Temperate rainforests occur in oceanic moist regions around the world: the Pacific temperate rainforests of North American Pacific Northwest as well as the Appalachian temperate rainforest in the Appalachian region of the United States; the Valdivian temperate rainforests of southwestern South America; the rainforests of New Zealand and southeastern Australia; northwest Europe (small pockets in Great Britain and larger areas in Ireland, southern Norway, northern Iberia and Brittany); southern Japan; the Black Sea–Caspian Sea region from the southeasternmost coastal zone of the Bulgarian coast, through Turkey, to Georgia, and northern Iran. The moist conditions of temperate rainforests generally support an understory of mosses, ferns and some shrubs and berries. Temperate rainforests can be temperate coniferous forests or temperate broadleaf and mixed forests. (Full article...) Leaf area index (LAI) is a dimensionless quantity that characterizes plant canopies. It is defined as the one-sided green leaf area per unit ground surface area (LAI = leaf area / ground area, m2 / m2) in broadleaf canopies. In conifers, three definitions for LAI have been used: Half of the total needle surface area per unit ground surface area Projected (or one-sided, in accordance the definition for broadleaf canopies) needle area per unit ground area Total needle surface area per unit ground area The definition “half the total leaf area” pertains to biological processes, such as gas exchange, whereas the definition “projected leaf area” was disregarded because the projection of a given area in one direction may differ in another direction when leaves are not flat, thick, or 3D-shaped. Moreover, “ground surface area” is specifically defined as “horizontal ground surface area” to clarify LAI on a sloping surface. The definition “half the total leaf area per unit horizontal ground surface area” is suitable for all kinds of leaves and flat or sloping surfaces. A leaf area index (LAI) expresses the leaf area per unit ground or trunk surface area of a plant and is commonly used as an indicator of the growth rate of a plant. LAI is a complex variable that relates not only to the size of the canopy, but also to its density, and the angle at which leaves are oriented in relation to one another and to light sources. In addition, LAI varies with seasonal changes in plant activity, and is typically highest in the spring when new leaves are being produced and lowest in late summer or early fall when leaves senesce (and may be shed). The study of LAI is called "phyllometry." (Full article...) Caliper(s) or calliper(s) are an instrument used to measure the dimensions of an object or hole; namely, the length, width, thickness, diameter or depth of an object or hole. The word caliper comes from latin roots meaning precise pincer. Many types of calipers permit reading out a measurement on a ruled scale, a dial, or an electronic digital display. A common association is to calipers using a sliding vernier scale. Some calipers can be as simple as a compass with inward or outward-facing points, but with no scale (measurement indication). The tips of the caliper are adjusted to fit across the points to be measured, and then kept at that span while moved to separate measuring device, such as a ruler. Calipers are used in many fields such as mechanical engineering, metalworking, forestry, woodworking, science and medicine. (Full article...) A stand density management diagram is a simple biological model relating forest yield to forest density at any stage of a particular forest stand's development. Stand density management diagrams are used in forest management and designed to use a current stand's density to project its future yield. One major reason for the effectiveness of density management diagrams is the relatively low effect of site variance on the diagram's shape. Density management diagrams have transformed ideas long held in traditional stocking diagrams. In 1967, Samuel F. Gingrich published his idea of comparing basal area per acre, trees per acre, and quadratic mean diameter in one graph. He called this the stocking diagram. These same principles are used to make the stand density management diagram work. Basal area and density are plotted against one another and quadratic mean diameter lines are plotted through the plot. The diagram itself is a plot of the natural logarithm of the volume or yield against the natural logarithm of stems per acre. Just like a stocking diagram, the A-line, B-line, and C-line are plotted. In addition, the -3/2 rule maximum density line is plotted just above the A-line. The diagram works well for even aged, single cohort stands. However, it is not as effective with uneven-aged stands. (Full article...) The Indian Forest Act, 1927 was largely based on previous Indian Forest Acts implemented under the British Raj. The most famous one was the Indian Forest Act of 1878. Both the 1878 Act and the 1927 Act sought to consolidate and reserve the areas having forest cover, or significant wildlife, to regulate movement and transit of forest produce, and duty leviable on timber and other forest produce. It also defines the procedure to be followed for declaring an area to be a Reserved Forest, a Protected Forest or a Village Forest. It defines what is a forest offence, what are the acts prohibited inside a Reserved Forest, and penalties leviable on violation of the provisions of the Act. (Full article...) Tropical deforestation as a global concern rose to prominence in the 1980s and can be attributed in part to environmentalists and northern countries advocating for the need to protect tropical woodland. A number of other economic and regulatory mechanisms such as financial aid, policy frameworks, and trade conventions were also established to prevent and mitigate deforestation. These include the International Tropical Timber Agreement (1983), the Convention of International Trade on Endangered Species (1975) and the Global Environment Facility (1991). Despite the increased levels of concern in the run-up to the 1992 Earth Summit held in Rio de Janeiro, tensions between the North and the global South over access to finance and technology for the preservation of forests protracted negotiations. Although many Northern countries had hoped for a legally binding convention, the resulting Statement of Forest Principles represents the "mean position of the lowest common denominator" and is voluntary. Disappointed with the outcome of the Earth Summit, NGOs such as the World Wide Fund for Nature (WWF) began to turn their attention to industry for a governance-oriented resolution to deforestation. In the lead-up to the Earth Summit, social groups, NGOs, and industries were also beginning to consult on the issue of deforestation. In America, the consultation process that eventually led to the establishment of the FSC was initiated in 1990 and concluded in the confirmation of support for the development of a voluntary worldwide certification and accreditation governance system that would cover all forest types. In the UK, NGO WWF began to facilitate action through the establishment of the 1995 Group, recruiting organizations that had been spurred on by instances of direct action and boycotting over the sale of tropical wood to form an NGO-business partnership. Through stakeholder involvement, it became apparent that a standard-setting body would be required to verify the source of wood products and define sustainable forest management. After 18 months of consultation in ten different countries, the Forest Stewardship Council was established in 1993. The failure of governments to reach any notable form of consensus in the form of an internationally reaching and legally binding agreement caused both disillusionment and an opportunity for change through the involvement of civil society and business actors to form "soft law". As such the establishment of the Forest Stewardship Council as the response to this disillusionment also represents a global shift from government to governance and its creation is a primary example of the use of market and economic factors to create movement on a global environmental issue. In February 2012, the membership approved the first major revision to the 10 Principles and associated Criteria (FSC P&C), which form the basis for all FSC standards and certification, in order to bring its certification up to date. The review and revision of the FSC P&C began in 2008 and gathered feedback from many FSC members and other stakeholders. This revision also marked the start of a process of developing baseline requirements for each of the revised Criteria. These requirements - called International Generic Indicators (IGIs) - are intended to ensure consistent application of the FSC P&C across all countries. Where national standards are not currently established, the IGIs will be used as interim standards. On 25 September 2009, the first FSC Friday took place in Bonn. FSC Friday is a once-a-year promotional event dedicated to the celebration of forests around the globe and the promotion of responsible forest management worldwide. (Full article...)

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The International Society of Arboriculture, commonly known as ISA, is an international non-profit organization headquartered in Atlanta, Georgia, United States. The ISA serves the tree care industry as a paid membership association and a credentialing organization that promotes the professional practice of arboriculture. ISA focuses on providing research, technology, and education opportunities for tree care professionals to develop their arboricultural expertise. ISA also works to educate the general public about the benefits of trees and the need for proper tree care. Worldwide, ISA has more than 22,000 members and 31,000 ISA-certified tree care professionals with 59 chapters, associate organizations, and professional affiliates throughout North America, Asia, Oceania, Europe, and South America. (Full article...) A bucksaw is a hand-powered frame saw similar to bow saw and generally used with a sawbuck to cut logs or firewood to length (bucking). Modern bucksaws usually have a metal frame ("H" or C-shaped) and a removable blade with coarse teeth held in tension by the frame. Lightweight portable or foldable models used for camping or back-packing are also available. It is often referred to as a bow saw in the North American hardware market, but that term traditionally refers to a different type of saw with a wooden frame. (Full article...) In forestry, quadratic mean diameter or QMD is a measure of central tendency which is considered more appropriate than arithmetic mean for characterizing the group of trees which have been measured. For n trees, QMD is calculated using the quadratic mean formula: ${\sqrt {\frac {\sum {D_{i}}^{2}}{n}}}$ where ${D_{i}}$ is the diameter at breast height of the ith tree. Compared to the arithmetic mean, QMD assigns greater weight to larger trees – QMD is always greater than or equal to arithmetic mean for a given set of trees. QMD can be used in timber cruises to estimate the standing volume of timber in a forest, because it has the practical advantage of being directly related to basal area, which in turn is directly related to volume. QMD can also be calculated as: ${\sqrt {\frac {BA}{k*n}}}$ where BA is stand basal area, n is the number of trees, and k is a constant based on measurement units - for BA in ft2 and DBH in inches, k=0.005454; for BA in m2 and DBH in cm, k=0.00007854. (Full article...) The economy of the Central African Republic is $2.321 billion by gross domestic product as of 2019, even lower than much smaller countries such as Barbados with an estimated annual per capita income of just $805 as measured by purchasing power parity in 2019. Sparsely populated and landlocked, the Central African Republic is overwhelmingly agrarian. The vast bulk of the population engages in subsistence farming and 55% of the country's GDP derives from agriculture. Subsistence agriculture, together with forestry, remains the backbone of the economy of the Central African Republic (CAR), with more than 70% of the population living in outlying areas. Principal food crops include cassava, peanuts, sorghum, millet, maize, sesame, and plantains. Principal cash crops for export include cotton, coffee, and tobacco. Timber has accounted for about 16% of export earnings and the diamond industry for nearly 54%. Central African Republic is a least developed country according to United Nations. (Full article...) An angle gauge is a tool used by foresters to determine which trees to measure when using a variable radius plot design in forest inventory. Using this tool a forester can quickly measure the trees that are in or out of the plot. An angle gauge is similar to a wedge prism though it must be held a fixed distance from the eye to work properly. Unlike the wedge prism, which is held over the plot center, the surveyor's eye is kept over plot-center when using an angle gauge. (Full article...) The Forestry Commission is a non-ministerial government department responsible for the management of publicly owned forests and the regulation of both public and private forestry in England. The Forestry Commission was previously also responsible for Forestry in Wales and Scotland. However, on 1 April 2013, Forestry Commission Wales merged with other agencies to become Natural Resources Wales, whilst two new bodies (Forestry and Land Scotland and Scottish Forestry) were established in Scotland on 1 April 2019. The Forestry Commission was established in 1919 to expand Britain's forests and woodland, which had been severely depleted during the First World War. The Commission bought large amounts of agricultural land on behalf of the state, eventually becoming the largest manager of land in Britain. Today, the Forestry Commission is divided into three divisions: Forestry England, Forestry Commission and Forest Research. Over time the purpose of the Commission broadened to include many other activities beyond timber production. One major activity is scientific research, some of which is carried out in research forests across Britain. Recreation is also important, with several outdoor activities being actively promoted. Protecting and improving biodiversity across England's forests are also part of the Forestry Commission's remit. The Commission received criticism for its reliance on conifers, particularly the uniform appearance of conifer forests and concerns over a lack of biodiversity. Furious protests from the general public and conservation groups accompanied attempts to privatise the organisation in 1993 and 2010. (Full article...) The Ministry of Agriculture, Forestry and Fisheries (農林水産省, Nōrin-suisan-shō) is a cabinet level ministry in the government of Japan responsible for oversight of the agriculture, forestry and fishing industries. Its acronym is MAFF. The current Minister of Agriculture, Forestry and Fisheries is Taku Etō. (Full article...) Like most states of the African Sahel, Chad has suffered desertification—the encroachment of the desert. Traditional herding practices and the need for firewood and wood for construction have exacerbated the problem. In the early 1980s, the country possessed between 135,000 and 160,000 square kilometres of forest and woodlands, representing a decline of almost 14% from the early 1960s. To what extent this decline was caused by climatic changes and to what extent by herding and cutting practices is unknown. Regulation was difficult because some people traditionally made their living selling wood and charcoal for fuel and wood for construction to people in the urban center. Although the government attempted to limit wood brought into the capital, the attempts have not been well managed, and unrestricted cutting of woodlands remained a problem. (Full article...) Forestry in Tasmania Australia has been conducted since early European settlement. The logging of old growth native forests in the state has been opposed by environmentalists and others via means such as lobbying, legislation and blockades. (Full article...) An arborist, or (less commonly) arboriculturist, is a professional in the practice of arboriculture, which is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants in dendrology and horticulture. Arborists generally focus on the health and safety of individual plants and trees, rather than managing forests or harvesting wood (silviculture or forestry). An arborist's scope of work is therefore distinct from that of either a forester or a logger. (Full article...) Continuous cover forestry (commonly referred to as "CCF") is an approach to the sustainable management of forests whereby forest stands are maintained in a permanently irregular structure, which is created and sustained through the selection and harvesting of individual trees. The term "continuous cover forestry" does not equate exactly to any one particular silvicultural system, but is typified by selection systems. For example, coppice with standards and Reiniger's target diameter harvesting are also continuous cover forestry. Different existing forest stands may require different silvicultural interventions to achieve a continuously productive irregular structure. Crucially, clearcutting and other rotational forest management systems are avoided. (Full article...) Hemispherical photography, also known as canopy photography, is a technique to estimate solar radiation and characterize plant canopy geometry using photographs taken looking upward through an extreme wide-angle lens or a fisheye lens (Rich 1990). Typically, the viewing angle approaches or equals 180-degrees, such that all sky directions are simultaneously visible. The resulting photographs record the geometry of visible sky, or conversely the geometry of sky obstruction by plant canopies or other near-ground features. This geometry can be measured precisely and used to calculate solar radiation transmitted through (or intercepted by) plant canopies, as well as to estimate aspects of canopy structure such as leaf area index. Detailed treatments of field and analytical methodology have been provided by Paul Rich (1989, 1990) and Robert Pearcy (1989). (Full article...) Growth and yield modelling is a branch of financial management. This method of modelling is also known as the Gordon constant growth model. In this method the cost of equity share capital is found by determining the sum of yield percentage and growth percentage.' ('Full article...) Scotland is ideal for tree growth, thanks to its mild winters, plentiful rainfall, fertile soil and hill-sheltered topography. As of 2019 about 18.5% of the country was wooded. Although this figure is well below the European Union (EU) average of 43%, it represents a significant increase compared to the figure of 100 years previously: in 1919 (at the end of the Great War) it was estimated that only 5% of the country's total land area was covered in forest. The Scottish Government's Draft Climate Change Plan has set an aim of increasing coverage to 21% of Scotland by 2032, with the rate of afforestation rising to 15,000 hectares per year by 2024. Approximately 4,700 km2 of Scotland's forests and woodlands are publicly owned by the Scottish Government via Forestry and Land Scotland, and these are termed the National Forest Estate. As of 2015, forestry contributed almost £1 billion to the Scottish economy, and the industry employed over 25,000 people. (Full article...) Pellet fuels (or pellets) are a type of solid fuel made from compressed organic material. Pellets can be made from any one of five general categories of biomass: industrial waste and co-products, food waste, agricultural residues, energy crops, and untreated lumber. Wood pellets are the most common type of pellet fuel and are generally made from compacted sawdust and related industrial wastes from the milling of lumber, manufacture of wood products and furniture, and construction. Other industrial waste sources include empty fruit bunches, palm kernel shells, coconut shells, and tree tops and branches discarded during logging operations. So-called "black pellets" are made of biomass, refined to resemble hard coal and were developed to be used in existing coal-fired power plants. Pellets are categorized by their heating value, moisture and ash content, and dimensions. They can be used as fuels for power generation, commercial or residential heating, and cooking. Pellets are extremely dense and can be produced with a low moisture content (below 10%) that allows them to be burned with a very high combustion efficiency. Further, their regular geometry and small size allow automatic feeding with very fine calibration. They can be fed to a burner by auger feeding or by pneumatic conveying. Their high density also permits compact storage and transport over long distance. They can be conveniently blown from a tanker to a storage bunker or silo on a customer's premises. A broad range of pellet stoves, central heating furnaces, and other heating appliances have been developed and marketed since the mid-1980s. With the surge in the price of fossil fuels since 2005, the demand for pellet heating has increased in Europe and North America, and a sizable industry is emerging. According to the International Energy Agency Task 40, wood pellet production has more than doubled between 2006 and 2010 to over 14 million tons. In a 2012 report, the Biomass Energy Resource Center says that it expects wood pellet production in North America to double again in the next five years. (Full article...) In forestry, periodic annual increment (PAI) is the change in the size of a tree between the beginning and ending of a growth period, divided by the number of years that was designated as the growing period. For sigmoid growth, the graph of PAI increases rapidly and then quickly declines, approaching zero. PAI may go negative if a tree loses volume due to damage or disease. Periodic annual increment is commonly used instead of current annual increment as a basis for computing growth per cent. Growth per cent indicates the rate of increase with relation to the wood capital required for its production, this is usually based on a single year's growth. (Full article...) A hand compass (also hand bearing compass or sighting compass) is a compact magnetic compass capable of one-hand use and fitted with a sighting device to record a precise bearing or azimuth to a given target or to determine a location. Hand or sighting compasses include instruments with simple notch-and-post alignment ("gunsights"), prismatic sights, direct or lensatic sights, and mirror/vee (reflected-image) sights. With the additional precision offered by the sighting arrangement, and depending upon construction, sighting compasses provide increased accuracy when measuring precise bearings to an objective. The term hand compass is used by some in the forestry and surveying professions to refer to a certain type of hand compass optimized for use in those fields, also known as a forester or cruiser compass. A hand compass may also include the various one-hand or 'pocket' versions of the surveyor's or geologist's transit. (Full article...) The Society of American Foresters was founded on November 30, 1900 by Gifford Pinchot and seven colleagues in the U.S. Department of Agriculture's Division of Forestry. (Full article...) This is a list of countries and territories of the world according to the total area covered by forests, based on data published by the Food and Agriculture Organization of the United Nations (FAO). In 2010, the world had 3.92 billion hectares (ha) of tree cover, extending over 30% of its land area. In 2020, the world had a total forest area of 4.06 billion ha, which was 31 percent of the total land area. This area is equivalent to 0.52 ha per person – although forests are not distributed equally among the world's people or geographically. The tropical domain has the largest proportion of the world's forests (45 percent), followed by the boreal, temperate and subtropical domains. More than half (54 percent) of the world's forests is in only five countries – the Russian Federation (20.1%), Brazil (12.2%), Canada (8.6%), the United States of America (7.6%) and China (5.4%). Many of the world's forests are being damaged and degraded or are disappearing altogether. Their capacity to provide tangible goods, such as fiber, food, and medicines, as well as essential ecological services, including habitat for biodiversity, carbon storage, and moderation of freshwater flows, is under greater threat than ever before.According to World Resource Institute in Washington, between 2000 and 2020 the world lost 101 million hectares (Mha) of tree cover, mostly tropical and subtropical forests (92%). The FAO is compiling a new global assessment due to be published in 2025. (Full article...) Aldo Leopold (January 11, 1887 – April 21, 1948) was an American writer, philosopher, naturalist, scientist, ecologist, forester, conservationist, and environmentalist. He was a professor at the University of Wisconsin and is best known for his book A Sand County Almanac (1949), which has been translated into fourteen languages and has sold more than two million copies. Leopold was influential in the development of modern environmental ethics and in the movement for wilderness conservation. His ethics of nature and wildlife preservation had a profound impact on the environmental movement, with his ecocentric or holistic ethics regarding land. He emphasized biodiversity and ecology and was a founder of the science of wildlife management. (Full article...) A cant hook or pike or a hooked pike is a traditional logging tool consisting of a wooden lever handle with a movable metal hook called a dog at one end, used for handling and turning logs and cants, especially in sawmills. A cant dog has a blunt end, or possibly small teeth for friction. A peavey or peavey hook is similar but has a spike in the working end of the handle. Many lumberjacks use the terms interchangeably. A peavey is generally from 30 to 50 inches (0.76 to 1.27 metres) long. The spike is rammed into a log, then a hook (at the end of an arm attached to a pivot a short distance up the handle) grabs the log at a second place. Once engaged, the handle gives the operator leverage to roll or slide or float the log to a new place. The peavey was named for blacksmith Joseph Peavey of Maine who invented the tool as a refinement to the cant hook in the late 1850s. The Peavey Manufacturing Co. is still located in Eddington, Maine, and manufactures several variations. From early times to about 1910, the peavey was written about with various spellings such as "pevy" and "pivie". (Full article...)

List of sharks

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Aulohalaelurus is a genus of catsharks in the family Scyliorhinidae. (Full article...) The shortfin mako shark (/ˈmɑːkoʊˌ ˈmeɪ-/; Māori: /ˈmaːko/; Isurus oxyrinchus), also known as the shortfin mako, blue pointer, or bonito shark, is a large mackerel shark. It is commonly referred to as the mako shark, as is the longfin mako shark (Isurus paucus). The fastest known shark species, able to reach speeds of 74 km/h (46 mph) in bursts, the shortfin mako can attain a size of 4 m (13 ft) in length and weigh 570 kg (1,260 lb). The species is classified as Endangered by the IUCN. (Full article...) Lamiopsis is a genus of shark in the family Carcharhinidae found in Indian and Pacific Ocean. This genus was previously considered to be monotypic. However, a recent taxonomic study revealed that the western central Pacific populations were a separate species. (Full article...) The Sarawak pygmy swellshark (Cephaloscyllium sarawakensis) is a species of catshark, belonging to the family Scyliorhinidae. It is found in the benthic zone near the edge of the Pacific continental shelf, at depths of 118–165 m. (Full article...) The Borneo broadfin shark or broadfin shark (Lamiopsis tephrodes) is a species of requiem shark, and part of the family Carcharhinidae. (Full article...) The birdbeak dogfish (Deania calcea) is a dogfish shark of the family Centrophoridae found in the Pacific Ocean around Honshū, Japan, southern Australia, New Zealand, and Chile, and in the Atlantic Ocean from Iceland south to the Cape of Good Hope. The birdbeak dogfish has a very long, narrow snout, no anal fin, two long and low dorsal fins with grooved spines, small rectangular pectoral fins, and pitchfork-like denticles. It lives at depths between 73 and 1,450 m. It is ovoviviparous with up to 12 pups per litter. It eats bony fish and shrimp. In June 2018 the New Zealand Department of Conservation classified the birdbeak dogfish as "Not Threatened" under the New Zealand Threat Classification System. A study published in the Journal of the Marine Biological Association of the United Kingdom evaluated the reproductive strategy of the female deep-water shark birdbeak dogfish. This research article discovers that there is a close relationship that exists between Hg level of pregnant females and the Hg level of their embryos, which indicates that there is a transfer of mercury from maternal sources. Therefore, there is a matrophoric strategy for the birdbeak dogfish that are ovoviviparous. With the rise of fisheries, the birdbeak dogfish is being consumed at higher rates. It has been found to be a good source of minerals, such as potassium and sodium. However, there have been health risks associated with frequent consumption of female dogfish. (Full article...) The Portuguese dogfish (Centroscymnus coelolepis) or Portuguese shark, is a species of sleeper shark of the family Somniosidae. This globally distributed species has been reported down to a depth of 3,675 m (12,057 ft), making it the deepest-living shark known. It inhabits lower continental slopes and abyssal plains, usually staying near the bottom. Stocky and dark brown in color, the Portuguese dogfish can be distinguished from similar-looking species (such as the kitefin shark, Dalatias licha) by the small spines in front of its dorsal fins. Its dermal denticles are also unusual, resembling the scales of a bony fish. This species typically reaches 0.9–1 m (3.0–3.3 ft) in length; sharks in the Mediterranean Sea are much smaller and have distinct depth and food preferences. Relatively common, the Portuguese dogfish is an active hunter capable of tackling fast, large prey. It feeds mainly on cephalopods and fishes, though it also consumes invertebrates and cetacean carrion. This shark has acute vision optimized for detecting the bioluminescence of its prey, as sunlight does not reach the depths at which it lives. The Portuguese dogfish is aplacental viviparous, with the young provisioned by yolk and perhaps uterine fluid. The females give birth to up to 29 young after a gestation period of over one year. Valued for its liver oil and to a lesser extent meat, Portuguese dogfish are important to deepwater commercial fisheries operating off Portugal, the British Isles, Japan, and Australia. These fishing pressures and the low reproductive rate of this species have led the International Union for Conservation of Nature (IUCN) to assess it as Near Threatened. (Full article...) The narrowhead catshark (Bythaelurus tenuicephalus) is a catshark of the family Scyliorhinidae. This species is described based on one adult and one juvenile male specimen from off Tanzania and Mozambique in the western Indian Ocean. The species differs from its congeners by its slender head and snout, which is only slightly bell-shaped in dorsoventral view without distinct lateral indention. It further differs from B. clevai by attaining a smaller maximum size and having a color pattern of fewer and smaller blotches, larger oral papillae, a shorter snout, and broader claspers without knob-like apex and with a smaller envelope and a subtriangular exorhipidion. Compared to B. hispidus, the species has a longer snout, a longer dorsal-caudal space, broader clasper without knob-like apex, and fewer vertebral centra. In contrast to B. lutarius, B. tenuicephalus attains a smaller size and has a blotched coloration, numerous oral papillae, shorter anterior nasal flaps, a longer caudal fin, a shorter pelvic anal space, and shorter and broader claspers. (Full article...) The longfin mako shark (Isurus paucus) is a species of mackerel shark in the family Lamnidae, with a probable worldwide distribution in temperate and tropical waters. An uncommon species, it is typically lumped together under the name "mako" with its better-known relative, the shortfin mako shark (I. oxyrinchus). The longfin mako is a pelagic species found in moderately deep water, having been reported to a depth of 220 m (720 ft). Growing to a maximum length of 4.3 m (14 ft), the slimmer build and long, broad pectoral fins of this shark suggest that it is a slower and less active swimmer than the shortfin mako. Longfin mako sharks are predators that feed on small schooling bony fishes and cephalopods. Whether this shark is capable of elevating its body temperature above that of the surrounding water like the other members of its family is uncertain, though it possesses the requisite physiological adaptations. Reproduction in this species is aplacental viviparous, meaning the embryos hatch from eggs inside the uterus. In the later stages of development, the unborn young are fed nonviable eggs by the mother (oophagy). The litter size is typically two, but may be as many as eight. The longfin mako is of limited commercial value, as its meat and fins are of lower quality than those of other pelagic sharks; however, it is caught unintentionally in low numbers across its range. The International Union for Conservation of Nature has assessed this species as endangered due to its rarity, low reproductive rate, and continuing bycatch mortality. In 2019, alongside the shortfin mako, the IUCN listed the longfin mako as "Endangered". (Full article...) The dense-scale lanternshark (Etmopterus pycnolepis) is a shark of the family Etmopteridae found in the southeast Pacific off Peru and Chile. (Full article...) The false lanternshark or false pygmy shark (Etmopterus pseudosqualiolus) is a shark of the family Etmopteridae found in the western Pacific from the Norfolk Ridge and Lord Howe Ridge off New Caledonia. (Full article...) The blue shark (Prionace glauca), also known as the great blue shark, is a species of requiem shark, in the family Carcharhinidae, which inhabits deep waters in the world's temperate and tropical oceans. Averaging around 3.1 m (10 ft) and preferring cooler waters, the blue shark migrates long distances, such as from New England to South America. It is listed as Near Threatened by the IUCN. Although generally lethargic, they can move very quickly. Blue sharks are viviparous and are noted for large litters of 25 to over 100 pups. They feed primarily on small fish and squid, although they can take larger prey. Maximum lifespan is still unknown, but it is believed that they can live up to 20 years. (Full article...) The broadnose catshark (Apristurus investigatoris) is a catshark of the family Scyliorhinidae, the holotype and only specimen being found in deep water in the Andaman Sea in the Indian Ocean between 16 and 10°N. Its length is around 26 cm, although this measurement was taken from an immature specimen. The reproduction of this catshark is oviparous. The threats are not exactly known but it may be deepwater fisheries. (Full article...) The porbeagle or porbeagle shark (Lamna nasus) is a species of mackerel shark in the family Lamnidae, distributed widely in the cold and temperate marine waters of the North Atlantic and Southern Hemisphere. In the North Pacific, its ecological equivalent is the closely related salmon shark (L. ditropis). It typically reaches 2.5 m (8.2 ft) in length and a weight of 135 kg (298 lb); North Atlantic sharks grow larger than Southern Hemisphere sharks and differ in coloration and aspects of life history. Gray above and white below, the porbeagle has a very stout midsection that tapers towards the long, pointed snout and the narrow base of the tail. It has large pectoral and first dorsal fins, tiny pelvic, second dorsal, and anal fins, and a crescent-shaped caudal fin. The most distinctive features of this species are its three-cusped teeth, the white blotch at the aft base of its first dorsal fin, and the two pairs of lateral keels on its tail. The porbeagle is an opportunistic hunter that preys mainly on bony fishes and cephalopods throughout the water column, including the bottom. Most commonly found over food-rich banks on the outer continental shelf, it makes occasional forays both close to shore and into the open ocean to a depth of 1,360 m (4,460 ft). It also conducts long-distance seasonal migrations, generally shifting between shallower and deeper water. The porbeagle is fast and highly active, with physiological adaptations that enable it to maintain a higher body temperature than the surrounding water. It can be solitary or gregarious, and has been known to perform seemingly playful behavior. This shark is aplacental viviparous with oophagy, developing embryos being retained within the mother's uterus and subsisting on non-viable eggs. Females typically bear four pups every year. Only a few shark attacks of uncertain provenance have been attributed to the porbeagle. It is well regarded as a game fish by recreational anglers. The meat and fins of the porbeagle are highly valued, which has led to a long history of intense human exploitation. However, this species cannot sustain heavy fishing pressure due to its low reproductive capacity. Direct commercial fishing for the porbeagle, principally by Norwegian longliners, led to stock collapses in the eastern North Atlantic in the 1950s, and the western North Atlantic in the 1960s. The porbeagle continues to be caught throughout its range, both intentionally and as bycatch, with varying degrees of monitoring and management. The International Union for Conservation of Nature (IUCN) has assessed the porbeagle as vulnerable worldwide, and as either endangered or critically endangered in different parts of its northern range. (Full article...) The pale spotted catshark, Asymbolus pallidus, is a cat shark of the family Scyliorhinidae found only off Queensland, at depths of between 225 and 400 m. Its length is up to 44 cm. (Full article...) The spotted estuary smooth-hound or rig (Mustelus lenticulatus) is a houndshark of the family Triakidae, found on the continental shelves and in estuaries around New Zealand. It is closely related to the gummy shark (Mustelus antarcticus) of Australia. Males can grow up to a length of 125 cm, while females can reach a length of 151 cm. It is commercially fished, and is commonly served in fish and chip shops in New Zealand under the name "lemonfish". In June 2018 the New Zealand Department of Conservation classified the spotted estuary smooth-hound as "not threatened" with the qualifier "conservation dependent" under the New Zealand Threat Classification System. (Full article...) The deepwater catshark (Apristurus profundorum) is a catshark of the family Scyliorhinidae, found in the western Atlantic from Delaware Bay to Suriname, and in the eastern Atlantic from Morocco to northwest Africa. An important key factor to understanding these creatures is ageing, many deepwater Apristurus profundorum have poorly calcified vertebrae that lack visible growth bands, and most do not have dorsal fin spines that can be used for ageing. Other methods, such as captive growth and tag-recapture, are also limited in their suitability for deepwater chondrichthyans due to difficulties in the deep sea. (Full article...) The whale shark (Rhincodon typus) is a slow-moving, filter-feeding carpet shark and the largest known extant fish species. The largest confirmed individual had a length of 18.8 m (61.7 ft). The whale shark holds many records for size in the animal kingdom, most notably being by far the most massive living non-cetacean animal. It is the sole member of the genus Rhincodon and the only extant member of the family Rhincodontidae, which belongs to the subclass Elasmobranchii in the class Chondrichthyes. Before 1984 it was classified as Rhiniodon into Rhinodontidae. Whale sharks inhabit the open waters of all tropical oceans. They are rarely found in water below 21 °C (70 °F). Whale sharks' lifespans are estimated to be between 80 and 130 years, based on studies of their vertebral growth bands and the growth rates of free-swimming sharks. Whale sharks have very large mouths and are filter feeders, which is a feeding mode that occurs in only two other sharks, the megamouth shark and the basking shark. They feed almost exclusively on plankton and small fishes and pose no threat to humans. The species was distinguished in April 1828 after the harpooning of a 4.6 m (15 ft) specimen in Table Bay, South Africa. Andrew Smith, a military doctor associated with British troops stationed in Cape Town, described it the following year. The name "whale shark" refers to the animal's appearance and large size; it is a fish, not a mammal, and (like all sharks) is not closely related to whales. In addition, its filter feeding habits are similar to baleen whales. (Full article...) The Australian sawtail catshark (Figaro boardmani) is a common species of catshark, and part of the family Scyliorhinidae, endemic to southern Australian waters. It is found on or near the bottom of the outer continental shelf and upper continental slope, at depths of 85 to 823 m (279 to 2,700 ft). This slim-bodied species is characterized by crests of enlarged dermal denticles along both the dorsal and ventral edges of its caudal fin and caudal peduncle, along with a color pattern of broad, dark saddles outlined in white. It can grow to 61 cm (24 in) in length. The Australian sawtail catshark feeds mainly on fishes, crustaceans, and cephalopods. Females are oviparous and lay eggs enclosed by capsules. This species is often caught incidentally by commercial bottom trawl fisheries, but is not significantly threatened by fishing activity. Thus, it has been assessed as of Least Concern by the International Union for Conservation of Nature (IUCN). (Full article...) The reticulated swellshark (Cephaloscyllium fasciatum) is a catshark of the family Scyliorhinidae. The Reticulated swellshark is found in the western Pacific Ocean between latitudes 21° N and 28° S, at depths between 220 and 450 m. It is a blunt snouted shark with an inflatable stomach, narrow eye slits and a pattern of spots and lines covering its body. It can grow up to 80 cm in length. (Full article...) The hammerhead sharks are a group of sharks that form the family Sphyrnidae, named for the unusual and distinctive form of their heads, which are flattened and laterally extended into a cephalofoil (a T-shape or "hammer"). The shark's eyes are placed one on either end of this T-shaped structure, with their small mouths directly centered and underneath. Most hammerhead species are placed in the genus Sphyrna, while the winghead shark is placed in its own genus, Eusphyra. Many different— but not necessarily mutually exclusive—functions have been postulated for the cephalofoil, including sensory reception, manoeuvering, and prey manipulation. The cephalofoil gives the shark superior binocular vision and depth perception. Hammerheads are found worldwide, preferring life in warmer waters along coastlines and continental shelves. Unlike most sharks, some hammerhead species will congregate and swim in large schools during the day, becoming solitary hunters at night. (Full article...) The onefin catshark (Pentanchus profundicolus) is a species of catshark, and part of the family Scyliorhinidae. It is the only member of its genus. (Full article...) The Australian sharpnose shark (Rhizoprionodon taylori) is a requiem shark, belonging to the family Carcharhinidae. It is found in the tropical waters of the western Pacific Ocean off Papua New Guinea and northern Australia, between latitudes 8°N and 28°S, from the surface to a depth of 110 m. It can grow up to a length around 70 cm. The Australian sharpnose shark is well known for its fast growth rate, which allows it to reach maturity at around one year of age. (Full article...)

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Notorynchus is a genus of deepwater sharks in the family Hexanchidae. There is one extant species. (Full article...) The smallbelly catshark (Apristurus indicus) is a catshark of the family Scyliorhinidae found in the western Indian Ocean near Somalia, the Gulf of Aden, and Oman, at depths between 1,300 and 1,840 m. Its length is up to 34 cm, although this measurement is of an immature specimen. The smallbelly catshark is not well known. It is found on continental slopes, and is probably caught by bottom trawlers. The reproduction of the smallbelly catshark is oviparous. (Full article...) The angular angelshark or Squantina guggenheim are sharks of the Squantina genus in the Squantinidae family. They originate in Brazil, Uruguay and Argentina while living in marine, brackish and demersal environments at depth of approximately 4-360m. Their typical food sources consist of bony fish, crustaceans, and mollusks. (Full article...) The Japanese spurdog (Squalus japonicus) is a dogfish, a member of the family Squalidae. It is found in the western Pacific Ocean – southeastern Japan and the East China Sea, including the Republic of Korea, the Philippines, and the Arafura Sea. It occurs in temperate and tropical waters along the continental shelf and slopes and primarily feeds on teleost fish and squid. It is caught as bycatch in commercial fishing, which has caused populations to decline. (Full article...) Oxynotus is a genus of sharks in the order Squaliformes, commonly known as the rough sharks. It is the only extant genus in the family Oxynotidae. They live in deep waters in the Atlantic and western Pacific Oceans. Rough sharks are small to medium in size, ranging from 49 to 150 cm (1.61 to 4.92 ft) in adult body length, depending on species. Their bodies are compressed, giving them a triangular cross-section. They have two large dorsal fins, each with a sharp spine, and with the first fin placed far forward above the head. Even more so than their relatives, the dogfishes, they have rough and prickly skin. Unusually among sharks, they also possess a luminous organ. (Full article...) The sherwood dogfish or Sherwood's dogfish (Scymnodalatias sherwoodi) is a very rare sleeper shark of the family Somniosidae, found only around New Zealand. The only specimen studied was about 80 cm long. The sherwood dogfish is ovoviviparous. (Full article...) Glyphis is a genus in the family Carcharhinidae, commonly known as the river sharks. They live in rivers or coastal regions in and around south-east Asia, Africa and parts of Australia. (Full article...) The grey sharpnose shark, Rhizoprionodon oligolinx, is a requiem shark of the family Carcharhinidae. It is found in the tropical waters of the Indo-West Pacific Oceans, between latitudes 30° N and 18° S, from the surface to a depth of 36 m. It can reach a length of about 70 cm. It is fished in the Gazetteer Indo-West Pacific and the waters from the Persian Gulf east to Thailand, Indonesia, China, and Japan. It has also been found in the Gulf of Carpentaria and Palau. In appearance and size, this species is very close to Rhizoprionodon taylori. The diet of the grey sharpnose shark consists of crustaceans, fishes, and cephalopods. It is commonly caught by inshore demersal gillnet fisheries, especially off Java for fish meal and its fins. It is also killed for human consumption, fresh or dried salted. It is considered to be harmless to people. (Full article...) The longnose velvet dogfish (Centroselachus crepidater) is a sleeper shark of the family Somniosidae, found circumglobally in southern hemisphere subtropical seas, at depths of between 230 and 1,500 m. It reaches a length of 130 cm. It has a diet consisting of predominantly mesopelagic fishes and squids. (Full article...) The plunket shark or Plunket's shark (Scymnodon plunketi) is a sleeper shark of the family Somniosidae, found around south eastern Australia, and New Zealand, at depths of between 220 and 1,550 m over continental shelves. It reaches a length of 130 cm. (Full article...) The common thresher (Alopias vulpinus), also known as Atlantic thresher, is the largest species of thresher shark, family Alopiidae, reaching some 6 m (20 ft) in length. About half of its length consists of the elongated upper lobe of its caudal fin. With a streamlined body, short pointed snout, and modestly sized eyes, the common thresher resembles (and has often been confused with) the pelagic thresher (A. pelagicus). It can be distinguished from the latter species by the white of its belly extending in a band over the bases of its pectoral fins. The common thresher is distributed worldwide in tropical and temperate waters, though it prefers cooler temperatures. It can be found both close to shore and in the open ocean, from the surface to a depth of 550 m (1,800 ft). It is seasonally migratory and spends summers at lower latitudes. The long tail of the common thresher, the source of many fanciful tales through history, is used in a whip-like fashion to deliver incapacitating blows to its prey. This species feeds mainly on small schooling forage fishes such as herrings and anchovies. It is a fast, strong swimmer that has been known to leap clear of the water, and possesses physiological adaptations that allow it to maintain an internal body temperature warmer than that of the surrounding sea water. The common thresher has an aplacental viviparous mode of reproduction, with oophagous embryos that feed on undeveloped eggs ovulated by their mother. Females typically give birth to four pups at a time, following a gestation period of nine months. Despite its size, the common thresher is minimally dangerous to humans due to its relatively small teeth and timid disposition. It is highly valued by commercial fishers for its meat, fins, hide, and liver oil; large numbers are taken by longline and gillnet fisheries throughout its range. This shark is also esteemed by recreational anglers for the exceptional fight it offers on hook-and-line. The common thresher has a low rate of reproduction and cannot withstand heavy fishing pressure for long, a case in point being the rapid collapse of the thresher shark fishery off California in the 1980s. With commercial exploitation increasing in many parts of the world, the International Union for Conservation of Nature has assessed this species as vulnerable. (Full article...) The Japanese topeshark (Hemitriakis japanica) is a species of houndshark, in the family Triakidae. It can reach a length of up to 1.1 m. It is found in the subtropical northwest Pacific from China, Taiwan, Korea, and Japan, between latitudes 40° N and 21° N. (Full article...) The grey sharpnose shark, Rhizoprionodon oligolinx, is a requiem shark of the family Carcharhinidae. It is found in the tropical waters of the Indo-West Pacific Oceans, between latitudes 30° N and 18° S, from the surface to a depth of 36 m. It can reach a length of about 70 cm. It is fished in the Gazetteer Indo-West Pacific and the waters from the Persian Gulf east to Thailand, Indonesia, China, and Japan. It has also been found in the Gulf of Carpentaria and Palau. In appearance and size, this species is very close to Rhizoprionodon taylori. The diet of the grey sharpnose shark consists of crustaceans, fishes, and cephalopods. It is commonly caught by inshore demersal gillnet fisheries, especially off Java for fish meal and its fins. It is also killed for human consumption, fresh or dried salted. It is considered to be harmless to people. (Full article...) Carcharhinus is the type genus of the family Carcharhinidae, the requiem sharks. One of 12 genera in its family, it contains over half of the species therein. It contains 35 extant and eight extinct species to date, with likely more species yet to be described. (Full article...) The reticulated swellshark (Cephaloscyllium fasciatum) is a catshark of the family Scyliorhinidae. The Reticulated swellshark is found in the western Pacific Ocean between latitudes 21° N and 28° S, at depths between 220 and 450 m. It is a blunt snouted shark with an inflatable stomach, narrow eye slits and a pattern of spots and lines covering its body. It can grow up to 80 cm in length. (Full article...) Thresher sharks are large mackerel sharks of the family Alopiidae found in all temperate and tropical oceans of the world; the family contains three extant species, all within the genus Alopias. All three thresher shark species have been listed as vulnerable by the World Conservation Union since 2007 (IUCN). All three are popular big-game sport fish, and additionally they are hunted commercially for their meat, livers (for shark liver oil), skin (for shagreen) and fins (for use in delicacies such as shark-fin soup). Despite being active predatory fish, thresher sharks do not appear to be a threat to humans. (Full article...) Springer's sawtail catshark (Galeus springeri) is a species of catshark, belonging to the family Scyliorhinidae, found in waters 457–699 m (1,499–2,293 ft) deep off the islands of the Antilles, from Cuba to the Leewards. A small, slim-bodied species reaching a length of 48 cm (19 in), the Springer's sawtail catshark can be identified by its color pattern of horizontal dark stripes in front of the first dorsal fin, and dark dorsal saddles behind. It is additionally characterized by the presence of saw-toothed crests, made of enlarged dermal denticles along both the dorsal and the ventral edges of the caudal fin. The Springer's sawtail catshark is oviparous. (Full article...) The Kermadec spiny dogfish (Squalus raoulensis) is a dogfish described in 2007. It is a member of the family Squalidae, found off the Kermadec Islands. The length of the longest specimen measured is 68.1 cm (26.8 in). In June 2018 the New Zealand Department of Conservation classified the Kermadec spiny dogfish as "Data Deficient" under the New Zealand Threat Classification System. (Full article...) The sand tiger shark (Carcharias taurus), gray nurse shark, spotted ragged-tooth shark or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf, from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth of around 191 m (627 ft). They dwell in the waters of Japan, Australia, South Africa, and the east coasts of North and South America. The sand tiger shark also inhabited the Mediterranean, however it was last seen there in 2003 and is presumed extinct in the region. Despite its common names, it is not closely related to either the tiger shark (Galeocerdo cuvier) or the nurse shark (Ginglymostoma cirratum). Despite its fearsome appearance and strong swimming ability, it is a relatively placid and slow-moving shark with no confirmed human fatalities. This species has a sharp, pointy head, and a bulky body. The sand tiger's length can reach 3.2 m (10.5 ft) but is normally 2.2–2.5 m in length. They are grey with reddish-brown spots on their backs. Shivers (groups) have been observed to hunt large schools of fish. Their diet consists of bony fish, crustaceans, squid, skates and other sharks. Unlike other sharks, the sand tiger can gulp air from the surface, allowing it to be suspended in the water column with minimal effort. During pregnancy, the most developed embryo will feed on its siblings, a reproductive strategy known as intrauterine cannibalism i.e. "embryophagy" or, more colorfully, adelphophagy—literally "eating one's brother". The sand tiger is categorized as critically endangered on the International Union for Conservation of Nature Red List. It is the most widely kept large shark in public aquariums owing to its tolerance for captivity. (Full article...) The Australian sawtail catshark (Figaro boardmani) is a common species of catshark, and part of the family Scyliorhinidae, endemic to southern Australian waters. It is found on or near the bottom of the outer continental shelf and upper continental slope, at depths of 85 to 823 m (279 to 2,700 ft). This slim-bodied species is characterized by crests of enlarged dermal denticles along both the dorsal and ventral edges of its caudal fin and caudal peduncle, along with a color pattern of broad, dark saddles outlined in white. It can grow to 61 cm (24 in) in length. The Australian sawtail catshark feeds mainly on fishes, crustaceans, and cephalopods. Females are oviparous and lay eggs enclosed by capsules. This species is often caught incidentally by commercial bottom trawl fisheries, but is not significantly threatened by fishing activity. Thus, it has been assessed as of Least Concern by the International Union for Conservation of Nature (IUCN). (Full article...) The broadnose sevengill shark (Notorynchus cepedianus) is the only extant member of the genus Notorynchus, in the family Hexanchidae. It is recognizable because of its seven gill slits, while most shark species have five gill slits, with the exception of the members of the order Hexanchiformes and the sixgill sawshark. This shark has a large, thick body, with a broad head and blunt snout. The top jaw has jagged, cusped teeth and the bottom jaw has comb-shaped teeth. Its single dorsal fin is set far back along the spine towards the caudal fin, and is behind the pelvic fins. In this shark the upper caudal fin is much longer than the lower, and is slightly notched near the tip. Like many sharks, this sevengill is counter-shaded. Its dorsal surface is silver-gray to brown in order to blend with the dark water and substrate when viewed from above. In counter to this, its ventral surface is very pale, blending with the sunlit water when viewed from below. The body and fins are covered in a scattering of small black & white spots. In juveniles, their fins often have white margins. It is also known as sevengill shark or simply sevengill and was formerly known as cow shark and mud shark; it is called sevengill due to its seven gill slits. Because of this, it was listed along with the sharpnose sevengill shark (Heptranchias perlo) by Guinness World Records as having the most gill slits. It is similar to the sharpnose sevengill shark but the latter has a pointed snout and lacks spots on its dorsal surface. The sevengill species are also related to ancient sharks as fossils from the Jurassic Period (200 to 145 million years ago) also had seven gills. As recently as the 1930s and 1940s, the shark was targeted by fisheries along the coast of California and, once the commercial fishery receded, recreational fishing of the shark started in the 1980s and 1990s. (Full article...) The smallfin catshark (Apristurus parvipinnis) is a catshark of the family Scyliorhinidae in the order Carcharhiniformes, found in the western Atlantic at depths between 635 and 1,115 m. Its length is up to 48 cm. (Full article...) The barbeled houndshark (Leptocharias smithii) is a species of ground shark and the only member of the family Leptochariidae. This demersal species is found in the coastal waters of the eastern Atlantic Ocean from Mauritania to Angola, at depths of 10–75 m (33–246 ft). It favors muddy habitats, particularly around river mouths. The barbeled houndshark is characterized by a very slender body, nasal barbels, long furrows at the corners of the mouth, and sexually dimorphic teeth. Its maximum known length is 82 cm (32 in). Likely strong-swimming and opportunistic, the barbeled houndshark has been known to ingest bony fishes, invertebrates, fish eggs, and even inedible objects. It is viviparous with females bearing litters of 7 young; the developing embryos are sustained via a unique globular placental structure. The International Union for Conservation of Nature (IUCN) has assessed the barbeled houndshark as Vulnerable, as heavy fishing pressure occurs throughout its range and it is used for meat and leather. (Full article...) The Mexican hornshark (Heterodontus mexicanus) is a bullhead shark of the family Heterodontidae. This shark is grey-brown in color, with black spots scattered on the fins and body. It has a cylindrical trunk, conical head, and small spiracles behind the eyes. The snout of the Mexican hornshark is very round and blunt. Like all members of the order Heterodontiformes, this shark has fin spines in front of both of its dorsal fins. The first dorsal fin originates before the pectoral fins, while the second dorsal fin originates behind the pelvic fins. The Mexican hornshark reaches a maximum length around 70 cm, but usually reaches between 50 and 60 cm on average. Young hornsharks hatch around 14 cm. (Full article...) The yellowspotted catshark (Scyliorhinus capensis) is a rare catshark of the family Scyliorhinidae. It is found in the southeast Atlantic, from Lüderitz, Namibia to central Natal, South Africa, between latitudes 0° and 37° S. It can grow up to a length of about 1.22 metres (4 ft 0 in). The reproduction of this catshark is oviparous. (Full article...)

List of dams and reservoirs

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The Stung Treng Dam is a proposed hydroelectric dam on the Mekong River in Stung Treng Province, Cambodia. It would be located on the mainstream of the Lower Mekong River. The project is controversial for several reasons, including its possible impact on the fisheries, as well as other ecological and environmental factors. (Full article...) Angat Dam (Tagalog: [aŋˈɡat]) is a concrete water reservoir embankment hydroelectric dam in the Philippines that supplies Metro Manila and nearby provinces with water. It was a part of the Angat-Ipo-La Mesa water system. The reservoir supplies about 90 percent of raw water requirements for Metro Manila through the facilities of the Metropolitan Waterworks and Sewerage System and it irrigates about 28,000 hectares of farmland in the provinces of Bulacan and Pampanga. (Full article...) Toker Dam is the fourth largest dam in Eritrea. Construction was begun in 1997 and completed in 2001, despite having to be halted for a few months in 1998 when Ethiopia and Eritrea were at war. Its primary designer was Natural Resources Consulting Engineers from Colorado, USA. Furthermore, NRCE Inc., was the primary consultant on the project. The construction contractor was Keagnam of South Korea. The project was designed to provide modern and effective service to the City of Asmara and neighboring villages. It further provides safe drinking water for the local population. The dam is a roller compacted concrete dam, and was one of the highest in sub-Saharan Africa at the time it was built. (Full article...) The Mesochora Dam is concrete-face rock-fill dam on the Acheloos River near Mesochora in Trikala, Greece. The 150 m (490 ft) tall dam is part of the Acheloos River Diversion which is intended to divert a portion of the Acheloos west to irrigate 240,000–380,000 ha (590,000–940,000 acres) in the Thessaly plains. The project includes the Mesochora, Sykia, Mouzaki and Pyli Dams along with a 17.4 km (10.8 mi) long channel. The idea for an Acheloos to Thessaly diversion project was first envisioned in the 1930s but a lack of funding precluded construction. Interest in the project was revived in 1984 and what was supposed to be a small dam at Mesochora apart from the diversion project was increased in size to support to river diversion. Over the next several years there was a series of legal battles that led to construction stalling, most recently in 2005. Opponents of the scheme cite significant changes to the environment, flooding of villages and that the scheme will divert 600,000,000 m3 (490,000 acre⋅ft) of water annually from the Acheloos. Supporters call on the benefit to the lucrative cotton crops it will help irrigate and the dam's planned 162 MW hydroelectric power plant. The Mesochora Dam was completed in January 2001 but the reservoir has yet to be filled and the power plant has subsequently not been commissioned due to legal battles. (Full article...) The Alpe Gera Dam is a gravity dam on the Cormor River in a lateral valley of Valmalenco 17 km (11 mi) northeast of Sondrio in the Lombardy region of Italy. It is 174 m (571 ft) tall and supports a 35 MW hydroelectric power station. The dam was constructed between 1958 and 1964 and is best known for the concrete placement techniques used during its construction. Instead of concrete being poured into conventional monoliths, it was poured in layers with a lean mix. Next, the concrete was settled with immersed vibrators and then contraction joints were cut into the layer. These methods were not only cost-saving but instrumental in the development of roller-compacted concrete in dam construction. (Full article...) The Mratinje Dam (Montenegrin: Брана Мратиње, romanized: Brana Mratinje) is a concrete arch dam in the canyon of the Piva River in Montenegro. The dam was completed in 1975 with designs by Energoprojekt. Its construction resulted in the flooding of the Piva Canyon and the creation of the Piva Lake, which, with its 12.5 km², is the second largest lake in Montenegro. The dam is 220 metres (720 ft) high, one of the highest in Europe. The dam is 268 metres (879 ft) long and 4.5 metres (15 ft) thick at the crest, while it is 30 metres (98 ft) long and 36 metres (118 ft) thick at the base. The foundations go as deep as 38 metres (125 ft) into the ground. 820,000 cubic metres (1,070,000 cu yd) of concrete and 5,000 tonnes of steel were built into the dam. The hydroelectric power station at Mratinje is capable of producing 860 gigawatt-hours per annum. It has three turbines and generators, each with a generation capacity of 120 MW. The location of the 16th century Piva Monastery was flooded by the lake, so while the dam was built, the monastery was broken into pieces and moved to a higher ground, 3.5 km away. It was reconstructed in the original way. (Full article...) Djorf Torba Dam is a dam in Kenadsa District, Béchar Province, Algeria, crossing the Oued Guir about 50 kilometres (31 mi) west of the capital, Béchar. It is used for the purposes of irrigation and water supply. The area around the head of the dam features a number of notable ancient monuments. The dam has resulted in a significant reduction in the flow of Oued Guir and Oued Saoura in locations downstream of the dam. (Full article...) The El Cajón Dam, officially known as Central Hidroeléctrica Francisco Morazán, is a hydroelectric power plant located in Western Honduras. The dam impounds the Comayagua River, which derives its large volume from two large tributaries, the Humuya River and the Sulaco River. El Cajón is a double arch dam, which uses parabolic geometry in horizontal and vertical axises to spread the weight of the impounded water to canyon walls which act as buttresses. Overall, the dam is the fifth highest dam in the Americas and the 15 th highest in the world, as well as the highest arch dam in the western hemisphere, and the sixth highest worldwide. (Full article...) Vinodol Hydro Power Plant is a large power plant in Croatia that has three turbines with a nominal capacity of 30 MW each having a total capacity of 90 MW. It is operated by Hrvatska elektroprivreda. (Full article...) The Stânca–Costești Dam (Romanian: Barajul Stânca–Costești) is a dam on the Prut River and a checkpoint between Moldova and Romania. The dam is located between Costești (Moldova) and Stânca (Romania). (Full article...)

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The Dubăsari Dam (also HPP Dubasari, Romanian: Hidroelectrocentrala de la Dubăsari) is a hydroelectric dam at the Dniester river near Dubăsari in Transnistria, Moldova. It was built in 1951–1954. The installed capacity of the hydroelectric power station is 48 MW. The Dubăsari Dam creates the Dubăsari reservoir (Romanian: Rezervuarul Dubăsari). The reservoir is 128 kilometres (80 mi) long and has an average width of 528 metres (1,732 ft). Water surface area is equal to 67.5 square kilometres (26.1 sq mi). (Full article...) The Papenoo Hydroelectric Power Station is located near the commune of Papenoo on the island Tahiti in the overseas country of France, French Polynesia. It has an installed capacity of 28 MW and was constructed between 1989 and 1994. The hydroelectric power station is owned by Electricite de Tahiti SA. It is the largest hydroelectric power station in Tahiti. It uses water provided by five reservoirs high up in the Papenoo Valley, above the commune. Each reservoir is created on the Papenoo River or a tributary by an embankment dam. From highest in elevation to lowest; Vaitapaa Dam at , which lies at an elevation of 411 m (1,348 ft) above sea level, is 15 m (49 ft) tall. It withholds a reservoir of 8,000 m3 (6.5 acre⋅ft). Next, at an elevation of 400 m (1,300 ft), Tahinu Dam, at is 33 m (108 ft) high and withholds a larger reservoir of 1,500,000 m3 (1,200 acre⋅ft). It is the tallest dam in Tahiti. Moving down is Vainavenave Dam at which lies at 399 m (1,309 ft) above sea level, is 29 m (95 ft) tall, and withholds a reservoir of 150,000 m3 (120 acre⋅ft). Fourth down the valley is the Vaituoru Dam at an elevation of 200 m (660 ft) with a reservoir capacity of 100,000 m3 (81 acre⋅ft). It is located at . Finally is the Tevaiohiro Dam at 85 m (279 ft) above sea level with a reservoir volume of 150,000 m3 (120 acre⋅ft). It is located at . Water from the reservoirs is sent to three separate power stations via 25.5 km (15.8 mi) of penstock. The power station highest in elevation, Papenoo 1 contains four 4 MW Pelton-turbine-generators and is located at . Next downstream is Papenoo 2 at which contains one 4 MW Pelton turbine-generators. Lastly, Papenoo 3 contains two 4 MW Pelton turbine-generators and is located at . (Full article...) The Taipingwan Dam (T'aep'yŏngman Dam) is a gravity dam on the lower Yalu River between China and North Korea. It is located about 30 km (19 mi) northeast of Dandong, Liaoning Province and Sinuiju, North Pyongan Province. The dam was first designed in 1978 and construction began in October 1982. The river was diverted in September 1983 and the first generator was operational on 25 December 1986. The three remaining generators were commissioned in 1987, and the dam was complete in July of that year. China built the dam and operates its 190 MW power station. Power from the dam is used by both China and North Korea. (Full article...) The Agua del Toro Dam is an arch dam on the Diamante River about 63 kilometres (39 mi) west of San Rafael in Mendoza Province, Argentina. The primary purpose of the dam is hydroelectric power generation and it supports a 150 megawatts (200,000 hp) power station located downstream. Construction on the dam began in 1966, and it was completed in 1973. The power station was started the same year and commissioned in 1982. The dam and power station is part of the Rio Diamante System which is owned jointly by Hidroeléctrica Diamante (HIDISA) and Hidroeléctrica de los Nihuiles (HINISA). (Full article...) The Tisza Dam, also known as the Kisköre Dam is a gravity dam on the Tisza River near Kisköre in Heves county, Hungary. It is the tallest dam in the country and also creates the largest reservoir in the country, Lake Tisza. It is a multi-purpose dam its purpose includes flood control and recreation. With a ship lock, it provides for navigation. Additionally, it supports a 28 MW hydroelectric power station, the largest in the country. Construction on the dam began in 1968 and it along with the power station were completed in 1973. (Full article...) The Yali Falls Dam is the second largest dam in Vietnam, located in Gia Lai and Kon Tum provinces on the Krong Poko, a tributary of the Sesan River, in the Central Highlands of Vietnam, about 70 kilometres (43 mi) upstream of the Cambodian border. The 69-metre (226 ft)-high dam was begun in 1993 and sealed in 1996, with the 64.5 square kilometres (24.9 sq mi) reservoir filled by 1998. It aims to generate 720 MW of hydropower. Like many large dam projects, it has been highly criticised, for causing flooding, damaging fisheries and for the lack of consultation with Cambodian authorities. Amongst those opposing the dam are the Sesan-Srepok-Sesong Protection Network (3SPN), organising 59 villages in northeast Cambodia to promote the environment in the three river basins and supported by Oxfam. (Full article...) The Wadi Qattara Dam, also referred to as Gattara or Al-Qattarah, is a clay-fill embankment dam located on Wadi Al-Qattara, 33 km (21 mi) east of Benghazi in Libya. Together with a secondary dam located 10 km (6 mi) downstream at and seven drop structures, the scheme was constructed after floods damaged the Benghazi area in 1938 and 1954. They were also constructed for irrigation water supply. Construction of the dams began in 1968 and was completed in 1971. However, a flood in 1979 severely damaged the main dam and destroyed the secondary dam downstream. The main dam was rehabilitated and the secondary dam was replaced with a rock-fill dam between 2000 and 2004 at a cost of US$30 million. The main dam was heightened 7 m (23 ft) and its total discharge capacity was increased to 240 m3/s (8,476 cu ft/s). Both dams were designed by Coyne et Bellier. (Full article...) The Grand Ethiopian Renaissance Dam (GERD or TaIHiGe; Amharic: ታላቁ የኢትዮጵያ ሕዳሴ ግድብ, romanized: Tālāqu ye-Ītyōppyā Hidāsē Gidib, Tigrinya: ግድብ ሕዳሰ ኢትዮጵያ, Oromo: Hidha Haaromsaa Guddicha Itoophiyaa), formerly known as the Millennium Dam and sometimes referred to as the Hidase Dam (Amharic: ሕዳሴ ግድብ, romanized: Hidāsē Gidib, Oromo: Hidha Hidāsē), is a gravity dam on the Blue Nile River in Ethiopia. The dam is in the Benishangul-Gumuz Region of Ethiopia, about 14 km (9 mi) east of the border with Sudan. Constructed between 2011 and 2020, the dam's primary purpose is electricity production to relieve Ethiopia's acute energy shortage and to export electricity to neighbouring countries. With a planned installed capacity of 5.15 gigawatts, when completed, the dam would be the largest hydroelectric power plant in Africa and among the 20 largest in the world. First phase of filling the reservoir began in July 2020 and in August 2020 water level increased to 540 meters (40 meters higher than the bottom of the river which is at 500 meters above sea level). The second phase of filling was completed on 19 July 2021, with water levels increased to around 575 meters. The third filling was completed on 12 August 2022 to a level of 600 metres (2,000 ft). The fourth filling was completed on 10 September 2023 with water levels at around 625 metres (2,051 ft). On 20 February 2022, the dam produced electricity for the first time, delivering it to the grid at a rate of 375 MW. A second 375 MW turbine was commissioned in August 2022. (Full article...) The Kifini Dam (greek Φράγμα της Τίρυνθας), also known as the Tiryns Dam, is a man-made dam constructed during the Mycenaean Period of 1260 B.C.E to divert the Lakissa River in Greece (Argolis, Nea Tirintha, ). It is located 900 m north of Agios Adrianos, 2 km east of Nea Tiryntha and 4 km east of the Mycenaean Palace of Tiryns. (Full article...) Huites Dam, officially known as Luis Donaldo Colosio Dam, is located on the Rio Fuerte in northwestern Sinaloa, Mexico 130 kilometres (81 mi) northeast of Los Mochis. The 162-metre (531 ft)-high, hybrid concrete arch-gravity dam impounds a reservoir called Lago Huites or Presa Luís Donaldo Colosio and is owned by the Comisión Federal de Electricidad. The construction of a dam on the upper Rio Fuerte was considered since the 1940s but the first detailed studies were not made until 1974–1977. Construction started in 1992 with the excavation of a diversion channel around the dam site and the implementation of a pair of cofferdams to protect the site from floods. About 485,000 cubic metres (634,000 cu yd) of material was excavated from the site before construction on the actual dam could begin. Placement of the 2,980,000 cubic metres (3,900,000 cu yd) of concrete in the dam, hydroelectric power plant and spillway structures was completed in 29 months, with the workforce peaking at 2,671 in May 1993. Construction was completed in 1995 at a cost of roughly US$ 212 million. The dam's two generators were commissioned on 15 September 1996. The impounded water behind the dam forms a reservoir with a capacity of 4.568 cubic kilometres (3,703,000 acre⋅ft), of which 2.908 cubic kilometres (2,358,000 acre⋅ft) is active capacity and 2.408 cubic kilometres (1,952,000 acre⋅ft) is reserved for irrigation and power production. About 1.102 cubic kilometres (893,000 acre⋅ft) are given exclusively for flood control. Floodwaters are released through a spillway on the south side of the dam, controlled by four 15.5 m × 21.0 m (50.9 ft × 68.9 ft) radial gates. Water stored in the reservoir is used to provide irrigation to 89,700 hectares (222,000 acres) of land in the Fuerte River valley. The dam's power plant has two Francis turbines with a combined generating capacity of 422 megawatts (MW) and produces an average of 875 million KWh annually. At full capacity, the plant utilizes a water flow of 235 m3/s (8,300 cu ft/s). (Full article...) Glomfjord power plant is a hydroelectric power plant in the village of Glomfjord in the municipality of Meløy in Nordland county, Norway. It gets its water from Nedre Navervatn lake which is located about 465 metres (1,526 ft) above sea level. The plant also house a newer 2.4MW Francis generator taking water from Fykanvatn lake as well. The outlet of the plant is the Glomfjorden and then the Norwegian Sea. The plant is currently owned by Statkraft. (Full article...) The Đa Nhim Hydroelectric Power Station is a power station on the Đa Nhim River in Vietnam. Phase 1 construction started in April 1961 and was finished in January 1964. It has installed capacity of 160 MW. Đa Nhim Lake is at an altitude of 1,042 metres (3,419 ft). It was the first hydroelectric power station in South Vietnam. Electricity produced here supplied the central region of Vietnam but was unable to reach the large industrial centres in Saigon and Bien Hoa, which had to rely on oil for electricity generation. Two large pipes, crossing the road, carrying water from a height of 1,000 metres to Đa Nhim lake, drive the turbines of the hydropower plant. (Full article...) The Papenoo Hydroelectric Power Station is located near the commune of Papenoo on the island Tahiti in the overseas country of France, French Polynesia. It has an installed capacity of 28 MW and was constructed between 1989 and 1994. The hydroelectric power station is owned by Electricite de Tahiti SA. It is the largest hydroelectric power station in Tahiti. It uses water provided by five reservoirs high up in the Papenoo Valley, above the commune. Each reservoir is created on the Papenoo River or a tributary by an embankment dam. From highest in elevation to lowest; Vaitapaa Dam at , which lies at an elevation of 411 m (1,348 ft) above sea level, is 15 m (49 ft) tall. It withholds a reservoir of 8,000 m3 (6.5 acre⋅ft). Next, at an elevation of 400 m (1,300 ft), Tahinu Dam, at is 33 m (108 ft) high and withholds a larger reservoir of 1,500,000 m3 (1,200 acre⋅ft). It is the tallest dam in Tahiti. Moving down is Vainavenave Dam at which lies at 399 m (1,309 ft) above sea level, is 29 m (95 ft) tall, and withholds a reservoir of 150,000 m3 (120 acre⋅ft). Fourth down the valley is the Vaituoru Dam at an elevation of 200 m (660 ft) with a reservoir capacity of 100,000 m3 (81 acre⋅ft). It is located at . Finally is the Tevaiohiro Dam at 85 m (279 ft) above sea level with a reservoir volume of 150,000 m3 (120 acre⋅ft). It is located at . Water from the reservoirs is sent to three separate power stations via 25.5 km (15.8 mi) of penstock. The power station highest in elevation, Papenoo 1 contains four 4 MW Pelton-turbine-generators and is located at . Next downstream is Papenoo 2 at which contains one 4 MW Pelton turbine-generators. Lastly, Papenoo 3 contains two 4 MW Pelton turbine-generators and is located at . (Full article...) Tendaho Dam is an earth-filled dam in the eastern Afar Region of Ethiopia. It is situated on the Awash River, and its reservoir also receives the output of the Mille River. The dam is a project of the Ethiopian Water Works Construction Enterprise (EWWCE). Project planning began in 2005, with construction occurring from 2010 to 2014. The dam is aimed at providing irrigation primarily for the Tendaho Sugar Factory sugar cane plantation., as well as drinking water for the region. Out of the 60,000 hectares of land planned to be irrigated, 10,000 would be allotted for social services and the community, and the remaining 50,000 hectares for cultivating sugar cane for the sugar factory. The nearest towns are Logiya, situated just north of the dam, and Semera, which has an airstrip (Semera Airport) and a university. (Full article...) The Tangevaerket Dam is an earth-fill embankment dam on the Gudenå River just east of the village of Tange in Viborg Municipality, Denmark. The primary purpose of the dam is hydroelectric power production and it supports a 3.3 MW power station which is the largest in the nation. The dam and power station were designed by Kristian Thomsen and S. A. Angelo in 1909. Construction did not begin until an agreement was reached with the Gudenå Commission. To build the dam, 500 men moved, by hand, about 300,000 m3 (390,000 cu yd) of earth. The power station was commissioned on 20 December 1920 and the reservoir flooded five homes and 22 farms. Its inauguration occurred on 8 January 1921. To produce power, water from the reservoir moves down a 500 m (1,600 ft) long and 6 m (20 ft) deep channel to the power station which houses three 1.1 MW Francis turbine-generators. The dam is also equipped with a fish ladder. The power station's original concession for power production was set for 80 years. The concession has since been prolonged several times. Last in 2015 where it was prolonged by another 30 years. (Full article...) The Cingino Dam is a gravity masonry dam located 7 kilometres (4 mi) southwest of Antrona Schieranco, Province of Verbano-Cusio-Ossola in Piedmont, Italy. The dam creates Lago Cingino (or Cingino reservoir) which is fed by the Antigine and Troncone streams. The reservoir has a surface area of 0.14 square kilometres (0.1 sq mi) and is maximum 2,262 metres (7,421 ft) above sea level, typically 2,250 metres (7,382 ft). It is one of five reservoirs within a hydroelectric complex in the Valle Antrona and helps supply the Campliccioli Power Plant with water for power production. The dam became an internet sensation due to pictures of Alpine Ibex that climb up its steep downstream face in order to lick salt off the stones. A video shared by the BBC's Forces of Nature with Brian Cox has been viewed over 208 million times as of May 2022. Despite the picturesque setting, Atlas Obscura describes the dam as "otherwise unremarkable." (Full article...) The Koshi Barrage is a sluice across the Koshi river that carries vehicular, bicycle, and pedestrian traffic between Saptari district and Sunsari district of Nepal. It is near the International border with India. It was built between 1958 and 1962 and has 56 gates. It was constructed after the Koshi Agreement was signed between the Government of Nepal and India on April 25, 1954. The barrage was designed and built by Joseph and Company Limited, India. The Koshi Tappu Wildlife Reserve is roughly 3–4 miles north of the barrage. (Full article...) The Péligre Dam is a gravity dam located off the Centre department on the Artibonite River of Haiti. At 72 m (236 ft) it is the tallest dam in Haiti. The dam was created as a flood-control and an energy-providing measure in the Artibonite River Valley during the 1950s, as part of the Artibonite Valley Agricultural Project. This dam impounds Lake Péligre. Despite its purpose of providing energy throughout Haiti, many contend that the energy provided by the dam is not distributed equitably. Furthermore, the dam has had significant environmental, social, and health consequences on the local people, who were forced to relocate as a result of the dam's completion. These are points of concern to academics, journalists, and human rights activists who, noting heavy North American involvement in the planning and construction of the dam, believe that neoliberal influences may be at play. (Full article...) La Esmeralda Dam is an embankment dam on the Batá River northwest of Santa María in Boyacá Department, Neira Province, Valle de Tenza (Tenza Valley) Colombia, 52 km to south of Tunja city. The primary purpose of the dam is hydroelectric power production and it is part of the Chivor Hydroelectric Project. Water from the Batá is diverted by the dam to a power station that discharges to the Lengupá River. The power station supplies 8% of Colombia's power demand. (Full article...) The Aldeadávila Dam is a Spanish concrete arch-gravity dam, straddling the border between Spain and Portugal on the Duero River (Douro in Portuguese). The nearest town is Aldeadávila de la Ribera in the Province of Salamanca, about 11.3 kilometres (7.0 mi) to the east. The nearest Portuguese town is Fornos in Bragança District, about 8 kilometres (5.0 mi) to the southwest. The Portuguese side of the river around the dam site lies within the Arribes del Duero Natural Park. (Full article...)

List of mountain ranges

{{ Transclude list item excerpts as random slideshow | List of mountain ranges | section=Mountain ranges on Earth }} Select from Earth section, avoiding Moon

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The Chic-Choc Mountains, also spelled Shick Shocks, form a mountain range in the central region of the Gaspe Peninsula in Quebec, Canada. It is a part of the Notre Dame Mountains, which are a subrange of the Appalachians. (Full article...) The Kitzbühel Alps (German: Kitzbüheler Alpen or Kitzbühler Alpen) are a mountain range of the Central Eastern Alps surrounding the town of Kitzbühel in Tyrol, Austria. Geologically they are part of the western slate zone (greywacke zone). (Full article...) The Svecofennian orogeny is a series of related orogenies that resulted in the formation of much of the continental crust in what is today Sweden and Finland plus some minor parts of Russia. The orogenies lasted from about 2000 to 1800 million years ago during the Paleoproterozoic Era. The resulting orogen is known as the Svecofennian orogen or Svecofennides. To the west and southwest the Svecofennian orogen limits with the generally younger Transscandinavian Igneous Belt. It is assumed that the westernmost fringes of the Svecofennian orogen have been reworked by the Sveconorwegian orogeny just as the western parts of the Transscandinavian Igneous Belt has. The Svecofennian orogeny involved the accretion of numerous island arcs in such manner that the pre-existing craton grew with this new material from what is today northeast to the southwest. The accretion of the island arcs was also related to two other processes that occurred in the same period; the formation of magma that then cooled to form igneous rocks and the metamorphism of rocks. (Full article...) Mount Lebanon (Arabic: جَبَل لُبْنَان, jabal lubnān, Levantine Arabic pronunciation: [ˈʒabal ləbˈneːn]; Syriac: ܛܘܪ ܠܒ݂ܢܢ, ṭūr leḇnān, Syriac pronunciation: [tˤur lewˈnɔn], ṭūr lewnōn) is a mountain range in Lebanon. It is about 170 km (110 mi) long and averages above 2,500 m (8,200 ft) in elevation, with its peak at 3,088 m (10,131 ft). The range provides a typical alpine climate year-round. Mount Lebanon is well-known for its snow-covered mountains, home to surviving Lebanese cedar forests and diverse high-altitude flora and fauna. The name Lebanon itself originates from the white, snow-covered tops of this mountain range. (Full article...) The Tushar Mountains are the third-highest mountain range in Utah after the Uinta Mountains and the La Sal Range. Located in the Fishlake National Forest, Delano Peak, 12,174 ft (3,711 m) NAVD 88, is the highest point in both Beaver and Piute counties and has a prominence of 4,689 ft (1,429 m). Delano Peak is named for Columbus Delano (1809–1896), Secretary of the Interior, during the Grant administration. The Tushars receive an ample amount of snow annually even though they are situated within the rainshadow of the Sierra Nevada range in California and the Snake Range located in Nevada. The main part of the range is in Beaver, Piute and Sevier counties. The northwestern corner extends into the southeastern corner of Millard County, and the southern end extends into the corners of Garfield and Iron counties. The Tushars are bounded roughly by I-15 to the west, I-70 to the north, US–89 to the east and U–20 to the south. U–153 crosses the southern part of the range between Beaver and Junction. (Full article...) Skanderbeg Mountains (Albanian: Vargmalet e Skënderbeut), also known as Vargmalet Perëndimore, are a prominent mountain range situated in the northwestern section of the Central Mountain Region of Albania. The range stretches approximately 100 km (62 mi), making it the longest in the country. It extends from the Gjadër river valley in the northwest to the Shkumbin river valley in the southeast; and from the trough of Mat in the east, to the plains between Lezhë, Tirana and Lower Shkodër in the west. The eastern side of the range is composed primarily of limestone from the Triassic-Jurassic era, separated into distinct blocks, while the western side is composed of limestone from the Ordovician and the Cretaceous-Paleogene eras, forming belts amid the Paleogene flysch. Ultrabasic rocks are also present, and the older flysch appears in the form of surface bands on the eastern side of the range. (Full article...) The Verkhoyansk Range (Russian: Верхоянский хребет, Verhojanskiy Hrebet; Yakut: Үөһээ Дьааҥы сис хайата, Üöhee Caaŋı sis xayata) is a mountain range in the Sakha Republic, Russia near the settlement of Verkhoyansk, well-known for its frigid climate. It is part of the East Siberian Mountains. The range lies just west of the boundary of the Eurasian and the North American tectonic plates. The mountains were formed by folding, and represent an anticline. The Verkhoyansk Range was covered by glaciers during the Last Glacial Period and the mountains in the northern section, such as the Orulgan Range, display a typical Alpine relief. There are coal, silver, lead, tin, and zinc deposits in the mountains. (Full article...) The Tapuae-o-Uenuku / Hector Mountains are a mountain range in the New Zealand region of Otago, near the resort town of Queenstown and just south of the more famous Remarkables. For most of its length, the mountains run adjacent to the southern reaches of Lake Wakatipu, before extending approximately 14 kilometres (8.7 mi) further south, past the glacial moraine at Kingston on the southern end of the lake. On their eastern side, the mountains mark the edge of the Nevis valley, a largely tussocked area which saw significant activity during the Otago Gold Rush of the 1860s. Historically, the mountains were an important mahinga kai (food gathering-place) for Ngāi Tahu and other local Māori iwi, who used the area to hunt for weka and gather tikumu while visiting the region. Many of the peaks in the range remain unnamed, a group which – until 2013 – included its highest point. Following a joint process between Ngāi Tahu and the Central Otago District Council, four new names were added to the region in 2013, including the adoption of the range's current dual name. This included the name of Mount Tūwhakarōria for the highest point of the range, as well as Te Karearea Peak for another prominent point as seen from Cromwell and Lake Te Kōhua for the small lake between the two. (Full article...) The Garnet Range, highest point Old Baldy Mountain, elevation 7,511 feet (2,289 m), is a mountain range northeast of Drummond, Montana in Powell County, Montana. A popular historic site, Garnet Ghost Town, is in the Garnet Range. Situated on Bureau of Land Management (BLM) land, the ghost town is the remnant of a mining settlement that was inhabited from the late 1800s to the 1930s. The town's population reached several thousand during its peak. A visitor center and self-guided tours are available. Although heavily forested, no portion of the Garnet Range is part of the National Forest system. The BLM owns much of the range, including the 11,580-acre Wales Creek Wilderness Study Area. The Wales Creek WSA is the last major drainage area without a road in the western Garnets, and features dense forests of lodgepole pine, spruce, Douglas fir, larch, aspen, and subalpine fir. Wales Creek WSA also hosts a thriving moose herd, goshawk nesting sites, a native cutthroat trout fishery, and four hot springs used in the past by miners and now by skiers and hunters. Another BLM Wilderness Study Area is in the eastern Garnets: the 11,380-acre Hoodoo Mountain WSA. This WSA is separated from unprotected BLM land in the Gallagher Creek drainage by a dirt road. Petrified wood is found along streams in the Gallagher Creek area. On the southern slope of the Garnets near the town of Drummond, the BLM's Rattler Gulch Area of Critical Environmental Concern protects 20 acres of exposed Madison Group limestone cliffs. Parking is provided, as Rattler Gulch is a popular rock-climbing area. Grizzly bears have recently been confirmed inhabiting the Garnets. (Full article...) Stogovo (Macedonian: Стогово; Albanian: Stogovë) is a mountain in the western part of North Macedonia. It has impressive peaks: Golem Rid (2278 m), Babin Srt (2242 m), Kanesh and many more higher than 2000 meters above the sea level. Mountain Stogovo can be easily reached by bus that goes from the capital of North Macedonia – Skopje to the town of Debar, at the place called "Boshkov most" (bridge). The nature is almost totally preserved on the range, because this mountain is far away from the large populated areas in the country and it is not frequently visited by mountain climbers. (Full article...) The Lilloise Range or Lilloise Mountains (Danish: Lilloise Bjerge) is a mountain range in King Christian IX Land, eastern Greenland. Administratively this range is part of the Sermersooq Municipality. In petrology the Lilloise Intrusion is named after this range. (Full article...) Cordón de Lila is a mountain range of the Andes located in northern Chile, south of Salar de Atacama. Geologically it is made up of a batholith of Cambrian and Ordovician age. The rocks of Cordón de Lila are the result of pre-Andean magmatism that occurred during the Famatinian orogeny. The compositions of the plutonic rocks are granodiorite and monzogranite that are either metaluminous or marginally peraluminous. These rocks are remnants of the magmatism along the western rim of the Famatinian orogeny. (Full article...) The Silvretta Alps are a mountain range of the Central Eastern Alps shared by Tirol, Vorarlberg (both in Austria) and Graubünden (Switzerland). The Austrian states of Tirol and Vorarlberg are connected by a pass road (Silvretta Hochalpenstraße at 2032 m). The majority of the peaks are elevated above three thousand metres and are surrounded by glaciers. Thus, the area is also known as the "Blue Silvretta". (Full article...) Snowdonia, or Eryri (pronounced [ɛrəri] ), is a mountainous region and national park in North Wales. It contains all 15 mountains in Wales over 3000 feet high, including the country's highest, Snowdon (Yr Wyddfa), which is 1,085 metres (3,560 ft) tall. These peaks are all part of the Snowdon, Glyderau, and Carneddau ranges in the north of the region. The shorter Moelwynion and Moel Hebog ranges lie immediately to the south. The national park has an area of 823 square miles (2,130 km2) (the fourth-largest in the UK), and covers most of central and southern Gwynedd and the western part of Conwy County Borough. This is much larger than the area traditionally considered Snowdonia, and in addition to the five ranges above includes the Rhinogydd, Cadair Idris, and Aran ranges and the Dyfi Hills. It also includes most of the coast between Porthmadog and Aberdyfi. The park was the first of the three national parks of Wales to be designated, in October 1951, and the third in the UK after the Peak District and Lake District, which were established in April and May 1951 respectively. The park received 3.89 million visitors in 2015. (Full article...) The Little Snowy Mountains are a small mountain range in central Montana about 25 miles (40 km) southeast of Lewistown. The range lies mostly in Fergus County, but the southern part of the range extends into Golden Valley and Musselshell counties. The range is a lower continuation of the Big Snowy Mountains which lie immediately to the west. The small Pike Creek Hills are 12 miles (19 km) to the east. The mountain pass between the Big and Little Snowies is at 6,018 feet (1,834 m) where Red Hill Road crosses the range. The pass elevation is considerably lower than the peaks of the Big Snowy range, but only about 200 feet (61 m) lower than the highest of the Little Snowy Range which are just northeast of the pass. Bold Butte, a named highpoint near the center of the range, has an elevation of 5,624 feet (1,714 m). The South Fork Flatwillow Creek runs from the north side of the pass near Red Hill and east along the north side of the range. Willow Creek and various tributaries drain most of the range to the south and flows into the Musselshell River on to the southeast. (Full article...) The Bonnington Range is a subrange of the Selkirk Mountains of the Columbia Mountains in southeastern British Columbia, Canada, located between Salmo River and Columbia River south of Nelson. (Full article...) The Borborema Plateau (Portuguese Planalto da Borborema, also known as the Serra da Borborema) is a plateau in northeastern Brazil which extends across the states of Pernambuco, Paraíba, and Rio Grande do Norte. The plateau is the northeasternmost portion of the Brazilian Highlands and is the most relevant watershed of its region. It ranges approximately 400 kilometres (250 mi) from north to south and 200 kilometres (120 mi) from east to west. More than 100 rivers originate from the plateau, including the Moxotó, Mundaú, Pajeú, Paraíba do Norte, Seridó, and Una. The Borborema Plateau serves as an orographic barrier, despite its relatively low elevation, against the moist easterly winds of the Atlantic Ocean. Areas west of the plateau, which make up part of the sertão, are arid and prone to drought. The Pajeú River, the largest tributary of the São Francisco River, originates from the Borborema. (Full article...) The Bakossi Mountains are a mountain range that forms part of the Cameroon line of active and extinct volcanoes in western Cameroon, covering about 230,000 square kilometres (89,000 sq mi). The mountains lie in the regions of Littoral and the Southwest. The highest peak in this range is Mount Kupe at 2,064 metres (6,772 ft). They contain a large area of cloud forest, and have considerable ecological interest. The mountains are home to the Bakossi people. The climate is tropical, with rainfall throughout the year. The drier season lasts from November to March, with cold nights and hot days. The rainy season starts in April and peaks between late August and the end of October. The soil is fertile, supporting coffee and cocoa as cash crops. The mountains hold the Bakossi Forest Reserve, a 5,517 square kilometres (2,130 sq mi) reserve created in 1956. In 2000, the main section of the reserve was designated a protection forest. All logging was banned and Kupe became a "strict nature reserve". The local Bakossi people participated in delineating the boundaries. The Forest Reserve in turn contains the Bakossi National Park, created by a decree in early 2008. The park covers 29,320 hectares (72,500 acres), and was justified on the basis of preserving plant diversification. (Full article...) The Bistra (Macedonian: Бистра) is a massif in North Macedonia. The massif has several summits higher than 2,000 metres, with the highest being Medenica at 2,163 metres above sea level. Limestone erosion on the mountain has created limestone fields. In the limestone region of the Bistra, there are fourteen limestone fields: Tonivoda, Govedarnik, Bardaš, Sultanica, Solomunica, Suvo Pole, Small and Big Brzovec, Čukni Topanica, Lower and Upper Poljce, Tri Bari, Tri Groba and Lazaropole. Much of the mountain's area lies within the boundaries of the Mavrovo National Park. (Full article...) The Dickson Range is a subrange of the Chilcotin Ranges subset of the Pacific Ranges of the Coast Mountains in southwest-central British Columbia. It is located just west of the town of Gold Bridge between the valley of Slim Creek to the north (a tributary of Gun Creek) and Downton Lake Reservoir to the south. At its eastern foot is Gun Lake; its western limit is at a pass between Slim Creek and Nichols Creek (which feeds the upper Bridge River just before it enters Downton Lake) near the pass which separates the Bridge River basin from that of the Lord River, which feeds the Taseko Lakes. The range is approximately 3,500 km2 (1,400 sq mi) in area and about 35 km in length. Its highest Peak, Dickson Peak (a.k.a. Mount Dickson) is a stunning pyramidal peak towards the eastern end of the range, overlooking the middle Bridge River Valley to the east and also visible on the canyon road between Gold Bridge and Bralorne. The drop from Dickson's summit to Downton Lake is c.2075m (6775') in only 5 km (3.1 mi). Just southeast of Dickson Peak is Mount Penrose 2,634 m (8,642 ft), which a cockscomb-like summit which stands immediately above Gun Lake and its resort community. Penrose was named for Republican Senator Boies Penrose (November 1, 1860 – December 31, 1921) who climbed it in the 1920s while hunting with famed local big-game outfitter W.G. (Bill) Manson. Penrose was an avid outdoorsman and another mountain in the Flathead area of Montana also bears his name. Penrose is the best-known summit in the Dickson after Dickson Peak, but farther east along the range are Scherle Peak 2,677 m (8,783 ft) and Tillworth Mountain 2,631 m (8,632 ft). A peak named Sorcerer 2,602 m (8,537 ft) occupies a separate ridge on the northwest end of the range, adjacent to the Leckie Range just north across Slim Creek. To the north and northeast of the Dickson Range is the Spruce Lake Protected Area a.k.a. the "South Chilcotin", while to the northwest is Ts'ilʔos Provincial Park. (Full article...) The Šar Mountains (Serbian: Шар-планина, romanized: Šar-planina, Macedonian: Шар Планина, romanized: Šar Planina; colloquially also Šara, Cyrillic: Шара) or Sharr Mountains (Albanian: Malet e Sharrit) is a mountain range extending from southern Kosovo, to northwestern North Macedonia, to northeastern Albania. The sections in Kosovo, and in North Macedonia are national parks. Rugged and barren, the mountains are among the highest in the Balkans, with 30 peaks higher than 2,500 m (8,202 ft). (Full article...) The Tenmile Range is a mountain range in U.S. state of Colorado. The range is an extension of the Mosquito Range which is part of the Rocky Mountains. The two ranges are effectively the same range. They are split only by the Continental Divide and name. The Tenmile Range is on the north side of the divide, and the Mosquito on the south. The range is often referred to as the Tenmile-Mosquito Range. There are more than a dozen peaks in the range. Peak 1 is the northernmost peak. The sub-peaks of Mt. Victoria and Mt. Royal are located north of Peak 1. Tenmile Peak, south of Peak 1, is also known as Peak 2. Quandary Peak is the southernmost peak and highest point in the Range, elevation 14,271 feet. The range is famous for its skiing, both backcountry and resort areas. Breckenridge Ski Resort is in the range. The Tenmile Range includes Pacific Tarn, believed to be the highest named lake in the United States. Approximately 25,000 acres (100 km2) of the Tenmile Range is protected in the Camp Hale – Continental Divide National Monument. (Full article...) The Eastern Beskids or Eastern Beskyds (Ukrainian: Східні Бескиди, romanized: Skhidni Beskydy; Polish: Beskidy Wschodnie; Rusyn: Выходны Бескиды; Romanian: Beskizii Orientali) are a geological group of mountain ranges of the Beskids, within the Outer Eastern Carpathians. As a continuation of the Central Beskids, this mountain range includes the far southeastern corner of Poland, the far eastern corner of Slovakia, and stretches southward through western parts of Ukraine, up to the border of Romania. In Polish and Ukrainian terminology, the range is commonly called the "Eastern Beskids" (Ukrainian: Східні Бескиди; Polish: Beskidy Wschodnie), while in Slovakia, the term Meadowed Mountains (Slovak: Poloniny) is also used. The scope of those terms varies in accordance to different traditions and classifications. At the three-way border, portions of the Slovak Bukovec Mountains (Slovak: Bukovské vrchy), the Polish Bieszczady Mountains (Polish: Bieszczady Zachodnie), and the adjacent "Uzhanskyi National Nature Park" and Nadsianskyi Regional Landscape Park in Ukraine form the transnational East Carpathian Biosphere Reserve. (Full article...) The Drakensberg (Zulu: uKhahlamba, Sotho: Maloti, Afrikaans: Drakensberge) is the eastern portion of the Great Escarpment, which encloses the central Southern African plateau. The Great Escarpment reaches its greatest elevation – 2,000 to 3,482 metres (6,562 to 11,424 feet) within the border region of South Africa and Lesotho. The Drakensberg escarpment stretches for more than 1,000 kilometres (600 miles) from the Eastern Cape Province in the South, then successively forms, in order from south to north, the border between Lesotho and the Eastern Cape and the border between Lesotho and KwaZulu-Natal Province. Thereafter it forms the border between KwaZulu-Natal and the Free State, and next as the border between KwaZulu-Natal and Mpumalanga Province. The escarpment winds north from there, through Mpumalanga, where it includes features such as the Blyde River Canyon, Three Rondavels, and God's Window. It then extends farther north to Hoedspruit in southeastern Limpopo where it is known as 'Klein Drakensberg' by the Afrikaner. From Hoedspruit it extends west to Tzaneen, also in Limpopo Province, where it is known as the Wolkberg Mountains and Iron Crown Mountain. At 2,200 m (7,200 ft) above sea level, the Wolkberg is the highest elevation in Limpopo. The escarpment extends west again and at Mokopane it is known as the Strydpoort Mountains. (Full article...) The Mineral Mountains are a 28 miles (45 km) long mountain range located in eastern Beaver and southeastern Millard counties in southwestern Utah. The Escalante Desert is to its southwest, the Black Rock Desert volcanic field and the Sevier Desert are to the north and northwest. The Pavant Range and Tushar Mountains lie to the east. The west side of the range borders the small Milford Valley with the Star Range beyond. Beaver River flows past the south and west sides of the range. The river is impounded as Minersville Reservoir adjacent to the southeast margin of the range. Milford Flat at the Mineral Mountains was the origin of the Milford Flat Fire which burned eastwards beyond Interstate 15 and Cove Fort into the Tushar and Pavant mountains. The mountains are also the source of the ornamental stone known as Utah Picasso 'Jasper', being more correctly a type of limestone or marble. (Full article...)

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The Kreuzeck Group is a mountain range of the Central Eastern Alps. It may be considered either a separate range or part of the larger High Tauern chain. Administratively, the range belongs to the Austrian states of Carinthia and, in the westernmost part, Tyrol (i.e. East Tyrol). (Full article...) The Brenta Group or Brenta Dolomites (Italian: Dolomiti di Brenta) is a mountain range, and a subrange of the Rhaetian Alps in the Southern Limestone Alps mountain group. They are located in the Province of Trentino, in northeastern Italy. It is the only dolomitic group west of the Adige River. Therefore, geographically, they have not always been considered a part of the Dolomites mountain ranges. Geologically, however, they definitely are - and therefore sometimes called the "Western Dolomites". As part of the Dolomites, the Brenta Group has been officially recognized as UNESCO World Heritage Site under the World Heritage Convention. (Full article...) The Pelion Range is a mountain range in the Cradle Mountain-Lake St Clair National Park, Tasmania, Australia. The range is named after Mount Pelion in Greece. The Overland Track passes over the range through the Pelion Gap and consequently several peaks are popular walks. The range features a number of the highest mountains in Tasmania, including the state's highest peak, Mount Ossa, with an elevation of 1,617 metres (5,305 ft) above sea level. The range is mainly composed of Jurassic Dolerite. (Full article...) The McKay Range is a small, low mountain range in northwestern British Columbia, Canada, located on the southern coast of Graham Island in the Haida Gwaii. It has an area of 60 km2 and consists of hills. It is a subrange of the Queen Charlotte Mountains which in turn form part of the Insular Mountains. (Full article...) Sierra Baguales or Sierra de los Baguales is a mountain range in the southernmost Andes. Sierra Baguales is a 60 kilometres (37 mi) long east–west chain, secondary to the main chain of the Andes that lie further west. It lies along the border between Chile and Argentina near the localities of Puerto Natales and Río Turbio. (Full article...) The Sivalik Hills, also known as the Shivalik Hills and Churia Hills, are a mountain range of the outer Himalayas. The literal translation of "Sivalik" is 'tresses of Shiva'. The hills are known for their numerous fossils, and is also home to the Soanian Middle Paleolithic archaeological culture. (Full article...) The Arctic Cordillera is a terrestrial ecozone in northern Canada characterized by a vast, deeply dissected chain of mountain ranges extending along the northeastern flank of the Canadian Arctic Archipelago from Ellesmere Island to the northeasternmost part of the Labrador Peninsula in northern Labrador and northern Quebec, Canada. It spans most of the eastern coast of Nunavut with high glaciated peaks rising through ice fields and some of Canada's largest ice caps, including the Penny Ice Cap on Baffin Island. It is bounded to the east by Baffin Bay, Davis Strait and the Labrador Sea while its northern portion is bounded by the Arctic Ocean. The geographic range is composed along the provinces of Labrador: including Eastern Baffin, Devon Island, Ellesmere, Bylot Island, the Torngat Mountains, and some parts of the Northeastern fringe. The landscape is dominated by massive polar icefields, alpine glaciers, inland fjords, and large bordering bodies of water, distinctive of many similar arctic regions in the world. Although the terrain is infamous for its unforgiving conditions, humans maintained an established population of 1000 people – 80% of which were Inuit. In addition, the landscape is 75% covered by ice or exposed bedrock, with a continuous permafrost that persists throughout the year, making plant and animal life somewhat scarce. The temperature of the Arctic Cordillera ranges from 6 °C in summer, down to −16 °C in winter. Vegetation is largely absent in this area due to permanent ice and snow. (Full article...) The Metacomet Ridge, Metacomet Ridge Mountains, or Metacomet Range of southern New England is a narrow and steep fault-block mountain ridge known for its extensive cliff faces, scenic vistas, microclimate ecosystems, and rare or endangered plants. The ridge is an important recreation resource located within 10 miles (16 km) of more than 1.5 million people, offering four long-distance hiking trails and over a dozen parks and recreation areas, including several historic sites. It has been the focus of ongoing conservation efforts because of its natural, historic, and recreational value, involving municipal, state, and national agencies and nearly two dozen non-profit organizations. The Metacomet Ridge extends from Branford, Connecticut, on Long Island Sound, through the Connecticut River Valley region of Massachusetts, to northern Franklin County, Massachusetts, 2 miles (3 km) short of the Vermont and New Hampshire borders for a distance of 100 miles (160 km). It is geologically distinct from the nearby Appalachian Mountains and surrounding uplands, and is composed of volcanic basalt (also known as trap rock) and sedimentary rock in faulted and tilted layers many hundreds of feet thick. In most cases, the basalt layers are dominant, prevalent, and exposed. The ridge rises dramatically from much lower valley elevations, although only 1,200 feet (370 m) above sea level at its highest, with an average summit elevation of 725 feet (221 m). (Full article...) The Caucasus Mountains is a mountain range at the intersection of Asia and Europe. Stretching between the Black Sea and the Caspian Sea, they are surrounded by the Caucasus region and are home to Mount Elbrus, the highest peak in Europe at 5,642 metres (18,510 ft) above sea level. The Caucasus Mountains include the Greater Caucasus in the north and the Lesser Caucasus in the south. The Greater Caucasus runs west-northwest to east-southeast, from the Western Caucasus on the northeastern shore of the Black Sea to Baku on the Caspian Sea, near Georgia. The Lesser Caucasus runs parallel to the Greater about 100 km (62 mi) south. The Greater and Lesser Caucasus ranges are connected by the Likhi Range, and to the west and east of the Likhi Range lie the Colchis Plain and the Kur-Araz Lowland respectively. The Meskheti Range is a part of the Lesser Caucasus system. In the southeast, the Aras River separates the Lesser Caucasus from the Talysh Mountains which runs through the Greater Azerbaijan region. The Lesser Caucasus and the Armenian Highland constitute the Transcaucasian Highland, which at their western end converges with the highland plateau of Eastern Anatolia. The Caucasus Mountains were part of the Silk Road. (Full article...) Cristal Mountains (Portuguese: Serra do Cristal), also known as Santo Antônio Mountains, are located in Brazil, in the state of Minas Gerais. One of the tourist points of interests of the mountain range are Cristal Falls, they have 20 metres (66 ft) of height. (Full article...) Ben Nevis (/ˈnɛvɪs/ NEV-iss; Scottish Gaelic: Beinn Nibheis, Scottish Gaelic pronunciation: [pe(ɲ) ˈɲivɪʃ]) is the highest mountain in Scotland, the United Kingdom, and the British Isles. The summit is 1,345 metres (4,413 ft) above sea level and is the highest land in any direction for 739 kilometres (459 miles). Ben Nevis stands at the western end of the Grampian Mountains in the Highland region of Lochaber, close to the town of Fort William. The mountain is a popular destination, attracting an estimated 130,000 ascents a year, around three-quarters of which use the Mountain Track from Glen Nevis. The 700-metre (2,300 ft) cliffs of the north face are among the highest in Scotland, providing classic scrambles and rock climbs of all difficulties for climbers and mountaineers. They are also the principal locations in Scotland for ice climbing. The summit, which is the collapsed dome of an ancient volcano, features the ruins of an observatory which was continuously staffed between 1883 and 1904. The meteorological data collected during this period is still important for understanding Scottish mountain weather. C. T. R. Wilson was inspired to invent the cloud chamber after a period spent working at the observatory. (Full article...) The Transantarctic Mountains (abbreviated TAM) comprise a mountain range of uplifted rock (primarily sedimentary) in Antarctica which extends, with some interruptions, across the continent from Cape Adare in northern Victoria Land to Coats Land. These mountains divide East Antarctica and West Antarctica. They include a number of separately named mountain groups, which are often again subdivided into smaller ranges. The range was first sighted by James Clark Ross in 1841 at what was later named the Ross Ice Shelf in his honour. It was first crossed during the British National Antarctic Expedition of 1901-1904. (Full article...) The Cordillera de la Ramada (Spanish for "Range of the Shelter", also called Cordón de la Ramada, in which cordón means 'ribbon' or 'rope', is a mountain range in the San Juan province of Argentina, forming part of the Andes. Its highest peak is Mercedario at 6,720 metres (22,050 ft). The first ascents of several peaks in the range were achieved by a Polish expedition of 1934 organized by the Tatra Society and led by Konstanty Jodko-Narkiewicz, whose party consisted of S. W. Daszynski, J. K. Dorawski, A. Karpinski, S. Osiecki, and W. Ostrowski. They climbed Mercedario, Alma Negra, Pico Polaco, La Mesa, and Cerro Ramada. The range is clearly visible from the better-known Aconcagua, the highest mountain in the Americas at 6,962 metres (22,840 ft), which is 100 km south of Mercedario, with the result that some of the many climbers who frequent Aconcagua move on to this range, although the area is less easy to access. Thanks to heavy cloud cover, the whole range has formed large glaciers which come to their lower ends at about 4,000 metres (13,120 ft). La Mesa, at 6,200 metres (20,340 ft), has especially huge glaciers and is not often climbed. Long ridge traverses are necessary to climb it. Temperatures can be extreme in summer and winter, but the climate is stable in the autumn and the spring. The best time of year for climbing in the range is from mid-December to the end of February. In the lower country beneath the range there are substantial mining industries, producing limestone, dolomite, bentonite, marble, aggregates, calcite and feldspar, as well as silver and gold. Paleontologists have found fossils here of some of the earliest dinosaurs, including the Herrerasaurus and Eoraptor lunensis. Local wildlife includes condors, rheas, guanacos and vicuña. (Full article...) The Bonanza Range is a small mountain range on Vancouver Island, British Columbia, Canada, located in the area between the Nimpkish River and the Tsitika River. It has an area of 150 km2 and is a subrange of the Vancouver Island Ranges which in turn form part of the Insular Mountains. (Full article...) The Villgraten Mountains (German: Villgratner Berge) or Deferegg Alps (Deferegger Alpen), also called the Defreggen Mountains (Defreggengebirge, archaically also with "ff") are a subgroup of the Austrian Central Alps within the Eastern Alps of Europe. Together with the Ankogel Group, the Goldberg Group, the Glockner Group, the Schober Group, the Kreuzeck Group, the Granatspitze Group, the Venediger Group and the Rieserferner Group, the Villgraten Mountains are part of the major mountain range, the High Tauern. Their highest summit is the Weiße Spitze with a height of 2,962 m above sea level (AA). (Full article...) The Sierra de la Giganta is a mountain range of eastern Baja California Sur state, located on the southern Baja California Peninsula in northwestern Mexico. It is a mountain range of the Peninsular Ranges System, which extends 1,500 km (930 mi) from Southern California, through the Baja California Peninsula in Baja California and Baja California Sur states. (Full article...) The Chilcotin Ranges are a subdivision of the Pacific Ranges of the Coast Mountains (in some classifications they are a separate subdivision). They lie on the inland lea of the Pacific Ranges, abutting the Interior Plateau of British Columbia. Their northwestern end is near the head of the Klinaklini River and their southeast end is the Fraser River just north of Lillooet; their northern flank is the edge of the Plateau while their southern is the north bank of the Bridge River. In some reckonings they do not go all the way to the Fraser but end at the Yalakom River, which is the North Fork of the Bridge. They are not one range but a collection of ranges, often very distinct from each other. There are three major named subranges: Dickson Range Shulaps Range Camelsfoot Range (assigned to the Interior Plateau in some definitions) To the west of the western end of the Chilcotin Ranges, and considered by some to be part of the group, are: Pantheon Range Niut Range South of which are the Waddington Range and the Homathko Icefield. (Full article...) The Mantiqueira Mountains (Portuguese: Serra da Mantiqueira [literally: Mantiqueira Mountains Chain]) are a mountain range in Southeastern Brazil, with parts in the states of São Paulo, Minas Gerais and Rio de Janeiro. The name shows the range's great importance as a source of drinking water, and the waters supply a great number of important cities in the southeast of Brazil. From its brooks are formed the Jaguari River, which supplies the northern region of Greater São Paulo; most left-bank tributaries of the Paraíba do Sul River, which crosses a densely populated and highly industrialized region; and the Grande River, which is the source of the Paraná River, one of the longest and most important in South America and the river with the world's largest hydroelectric output, through a series of power plants way down the river to Argentina and Paraguay. Many springs of mineral water lie in the regions of Caxambu and São Lourenço in Minas Gerais, and Campos do Jordão and Serra Negra in São Paulo. (Full article...) The Old Man Range, also called Kopuwai, is a mountain range in Central Otago, in the South Island of New Zealand. It lies to the west of the valley of the Clutha River, close to the town of Alexandra and the artificial Lake Roxburgh. The range stretches north-south for a distance of some 40 kilometres (25 mi). Part of the range forms the border between the Otago and Southland Regions. The range's Māori name, Kopuwai, means "Water Swallower", and was the name of a mythical giant who lived in the area. The range rises to a narrow ridge at a height of just over 1,500 metres (4,900 ft). The highest points are the 1,682 metres (5,518 ft) Obelisk (also known as The Old Man, and from which the range gets its name) at (), and Hyde Rock (1,673 metres (5,489 ft)). The eastern flanks of the range are steep, falling away to the Clutha Valley. In contrast, the western flanks fall gently to a high plateau before rising to a lower ridge known as the Old Woman Range. The plateau which has areas of both bare rock and marsh, is the source of numerous creeks, most of them part of the catchment of the young Waikaia and Earnscleugh Rivers. The geology of the range is dominated by the schists of the Caples and Torlesse Terranes. The rock is a source of gold, and the area was worked during the Otago Gold Rush of the 1860s. Several remnants of the mining era can still be seen in the range. Much of the range is conservation land controlled by the New Zealand Department of Conservation (DOC), and divided between the Kopuwai and Bain Block Conservation Areas. Two more, much smaller, ranges of this name exist in New Zealand — a low range of hills in inland Canterbury, between Lakes Pukaki and Alexandrina, and a higher hill range in the Tasman District, close to Farewell Spit. (Full article...) The De Long Mountains are a mountain range in the North Slope Borough of the U.S. state of Alaska. The range is located at the west end of the Brooks Range and extends west from Uivaksak Creek and the head of the Kuna River. They were named in 1886 after the Arctic explorer George Washington De Long (1844–1881). The highest point is Black Mountain at 5,020 feet (1,530 m). (Full article...) The Everett Mountains are a mountain range located at Frobisher Bay on southern Baffin Island, Nunavut, Canada. Nunavut's capital city Iqaluit is protected by the Everett Mountains. The mountain range is a subrange of the Arctic Cordillera. (Full article...) Kožuf Mountain (Macedonian: Кожуф Планина or Tzena / Zona (Greek: Τζένα/Tzena, Ζώνα/Zona) is a mountain situated in the southern part of North Macedonia. Associated village names are Konopište, Kavadarci and Gevgelija. Smrdliva Voda is a mineral springwater site on its northeastern flank. Kavadarci Municipality and Gevgelija Municipality split the mountain. Its most western parts reach the river Blashnica, and the north-western side stretches in a line, from the Mrezhichko village via the village of Konopište, through the course of Boshava to the city of Demir Kapija. Kožuf is a specific mountain because it is the first natural barrier in North Macedonia that is directly exposed to the influences of the Mediterranean and the Aegean Sea. Its highest peak is Zelen Breg (or Portes), at 2,171 meters above the sea level. A new and modern ski center, whose construction began in 2001, was opened in 2009 on the mountain. (Full article...) The Rätikon is a mountain range of the Central Eastern Alps, located at the border between Vorarlberg, Liechtenstein and Graubünden. It is the geological border between the Eastern and Western Alps and stretches from the Montafon as far as the Rhine. In the south, the Prättigau is its limit, and in the north, it is the Walgau. In the east, it borders the Silvretta groups. The Rätikon mountain range derives its name from Raetia, a province of the Roman Empire, named after the Rhaetian (Raeti or Rhaeti) people. (Full article...) The Müller Mountains (Indonesian: Pegunungan Muller) are a mountain range in Central Borneo. The mountains extend along the northern border of Kalimantan, the Indonesia-administered parts of Borneo. The mountains are the source of the Kapuas River. The range is named after Georg Müller, a German engineer who traversed the mountains in the 1820s. (Full article...) Argentina, officially the Argentine Republic, is a country in the southern half of South America. Argentina covers an area of 2,780,400 km2 (1,073,500 sq mi), making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a federal state subdivided into twenty-three provinces, and one autonomous city, which is the federal capital and largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system. Argentina claims sovereignty over the Falkland Islands, South Georgia and the South Sandwich Islands, the Southern Patagonian Ice Field, and a part of Antarctica. The earliest recorded human presence in modern-day Argentina dates back to the Paleolithic period. The Inca Empire expanded to the northwest of the country in Pre-Columbian times. The country has its roots in Spanish colonization of the region during the 16th century. Argentina rose as the successor state of the Viceroyalty of the Río de la Plata, a Spanish overseas viceroyalty founded in 1776. The declaration and fight for independence (1810–1818) was followed by an extended civil war that lasted until 1861, culminating in the country's reorganization as a federation. The country thereafter enjoyed relative peace and stability, with several waves of European immigration, mainly Italians and Spaniards, influencing its culture and demography. Following the death of President Juan Perón in 1974, his widow and vice president, Isabel Perón, ascended to the presidency, before being overthrown in 1976. The following military junta, which was supported by the United States, persecuted and murdered thousands of political critics, activists, and leftists in the Dirty War, a period of state terrorism and civil unrest that lasted until the election of Raúl Alfonsín as president in 1983. Argentina is a regional power, and retains its historic status as a middle power in international affairs. A major non-NATO ally of the United States, Argentina is a developing country with the second-highest HDI (human development index) in Latin America after Chile. It maintains the second-largest economy in South America, and is a member of G-15 and G20. Argentina is also a founding member of the United Nations, World Bank, World Trade Organization, Mercosur, Community of Latin American and Caribbean States and the Organization of Ibero-American States. (Full article...)

List of dams and reservoirs (Africa)

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The Wadi Mejenin Dam is an embankment dam located on Wadi Mejenin, 64 km (40 mi) south of Tripoli in the Jabal al Gharbi District of Libya. Completed in 1972, the primary purpose of the dam is water supply for irrigation and flood control. (Full article...) Omatako Dam is an earth-fill embankment dam about 100 kilometres (62 mi) north of Okahandja in the Otjozondjupa Region of Namibia. It is named after the Omatako Mountains, and it dams the ephemeral Omatako River, with Omatako meaning "butt" in Oshiwambo, the name referring to the shape of the Omatako Mountains. The dam has a capacity of 43.49 million cubic metres (56,880,000 cu yd). Completed in 1981, it was originally envisaged to become part of the Eastern National Water Carrier, a scheme to supply water to Namibia's capital Windhoek from the Okavango River, 1,000 kilometres (620 mi) to the north on the Angolan border. The scheme was never completed. Omatako Dam today only contains floods and supplies water to the Von Bach Dam. As such, it is one of three dams supplying the capital Windhoek with water. (Full article...) The Manantali Dam (French: Barrage de Manantali) is a multi-purpose dam on the Bafing river in the Senegal River basin, 90 kilometres (56 mi) to the south-east of Bafoulabé, in Mali's Kayes Region. (Full article...) Kihansi Hydroelectric Power Station, is a 180 megawatts (241,384 hp) hydroelectric power station located in Kilombero District of southeast Morogoro Region in southern Tanzania. The power station is one of the largest dams in the country. The Tanzanian electricity company, Tanesco operates the power station on behalf of the government of Tanzania. (Full article...) The Meraldene Dam, or Barrage Meraldene, is an embankment dam on the Meraldene River, located at 3 km (2 mi) southwest of Thénia in Boumerdès Province within Kabylia in Algeria. (Full article...) The Keddara Dam, or Barrage Keddara, is an embankment dam 6 km (4 mi) northwest of Keddara on the Boudouaou River in Boumerdès Province, Algeria. Constructed between 1982 and 1987 by Yugoslav company Hidrotehnika, the primary purpose of the dam is water supply for irrigation and municipal use in Algiers which is located 35 km (22 mi) to the west. The dam's reservoir has a capacity of 146,500,000 m3 (118,769 acre⋅ft) which is collected from drainage and the Hamiz Dam 7.6 km (5 mi) to the west and the Beni Amrane Dam 17 km (11 mi) to the east. (Full article...) The Tsiazompaniry Dam is a buttress dam on the Varahina-South River, a tributary of the Ikopa River, near Tsiazompaniry in the Analamanga Region of Madagascar. The dam was constructed by a French firm in 1956. It creates Lake Tsiazompaniry, the largest reservoir in the country, which has a surface area of 31 km2 (12 sq mi) and a storage volume of 260,000,000 m3 (210,000 acre⋅ft). A second buttress dam, 1 km (0.62 mi) northwest of the main dam helps withhold the reservoir. Water released from the dam supplies a regulated flow to hydroelectric power station at the Antelomita Dam downstream. Efforts to install a 5.25 MW power station at the base of the dam began in 2011. (Full article...) The Al Massira Dam is a gravity dam located 70 kilometres (43 mi) south of Settat on the Oum Er-Rbia River in Settat Province, Morocco. Completed in 1979, the dam provides water for the irrigation of over 100,000 hectares (250,000 acres) of farmland in the Doukkala region. The dam's hydroelectric power plant also generates 221 gigawatt-hours (800 TJ) on average annually. The power station was commissioned in 1980. Just north of the dam is a rip rap saddle dam that supports water elevation in the reservoir. The dam's reservoir and wetlands were designated as a Ramsar site in 2005. In 2024 analysis of satellite images of the dam by the BBC revealed the volume of water was 3% of the amount present nine years previously. The country had suffered from six consecutive years of drought. The Moroccan water ministry told the BBC that use of the dam's water for irrigating farmland had been suspended since 2021, the water being reserved for supplying cities such as Casablanca and Marrakesh. Many of the springs in the Middle Atlas mountains, which feed the reservoir, had dried-up. Reduced snowfall at higher altitude had also contributed to less meltwater flowing into the streams feeding the dam. In August 2023 Morocco recorded a record highest-ever temperature of 50.4C which caused an increase in evaporation, adding to a reduction in water's level. (Full article...) The Kasserine Dam was a Roman dam at Kasserine (ancient Cillium), Tunisia. The curved structure which dates to the 2nd century AD is variously classified as arch-gravity dam or gravity dam. The dam consisted of a core of earth and rubble faced with mortared blocks of cut stone. The upstream face is vertical, while the downstream side steps down through six courses and then continues vertically for 3.8 m. The thickness at the crest is 4.9 m, and at the base 7.3 m. (Full article...) Weija Dam is a dam on the Densu River which supports the main water treatment plant for Accra in the Greater Accra Region of Ghana. It is operated by the Ghana Water Company.This supplies about 80 percent of the potable water for the entire city of Accra and its surrounding environs. Its construction began in 1974 and was completed in 1978 by Messrs Tahi, an Italian Company. (Full article...) Ruzizi IV Hydroelectric Power Station, is a proposed hydro-power plant, with planned capacity installation of 287 megawatts (385,000 hp) when completed. (Full article...) The Grand Poubara Dam is a gravity dam on the Ogooué River, about 15 kilometres (9.3 mi) south of Franceville in Gabon. The primary purpose of the dam is hydroelectric power generation, and it supports a 160 megawatts (210,000 hp) power station. (Full article...) Massingir Dam is a dam on the Rio dos Elefantes (Olifants or Lepelle), Gaza Province, Mozambique. It is named after the town of Massingir, in Massingir District. The Shingwedzi River flows close to the northeastern side of the reservoir and joins the Rio dos Elefantes about 12 kilometres (7.5 mi) downstream from the dam wall. (Full article...)

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Outline of underwater diving § Modes of underwater diving

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References

This section contains references and notes. It should be empty.