 The term cumec is also used, as shorthand for "Cubic metres per second", with the plural form "cumecs" also common in speech.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 cumec 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).