Cubic metre per second

(Redirected from Cumecs)

Cubic metre per second or cubic meter per second in American English (symbol m3 ⋅ s−1 or m3/s) is the unit of volumetric flow rate in the International System of Units (SI). It corresponds to the exchange or movement of the volume of a cube with sides of one metre (39.37 in) in length (a cubic meter, originally a stere) each second. It is popularly used for water flow, especially in rivers and streams, and fractions for HVAC values measuring air flow.

Cubic metre per second
Unit systemSI
Unit ofvolumetric flow rate
Symbolm3/s
In SI base unitsm3·s−1

The term cumec is sometimes used as an acronym for full unit name,[1] with the plural form cumecs also common in speech.[citation needed] It is commonly used between workers in the measurement of water flow through natural streams and civil works, but rarely used in writing.

Data in units of m3 ⋅ s−1 are used along the y-axis or vertical axis of a flow hydrograph, which describes the time variation of discharge of a river (the mean velocity multiplied by cross-sectional area). A moderately sized river discharges in the order of 100 m3 ⋅ s−1.

Conversions

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1 cubic metre per second  1000  litres per second
60  kilolitres per minute
86.4  megalitres per day
31.5576  gigalitres per year
≈  219.969248  imperial gallons per second
≈  264.172051  US gallons per second
≈  35.314454  cubic feet per second
≈  1.305  cubic yards per second
≈  25566.497  acre-feet per year
≈  1113676621  cubic feet per year
≈  0.00757090916  cubic miles per year

References

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  1. ^ "Units: C", The University of North Carolina at Chapel Hill, webpage: UNC-Rowlett. Archived on June 2, 2018.

See also

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