Irrigation Engineering
As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at

higher level
same level
lower level
any of the above depending on the design

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Irrigation Engineering
The flow-mass curve is graphical representation of

Cumulative discharge, volume and time in chronological order
Discharge and percentage probability of flow being equaled or exceeded
Cumulative discharge and time
Discharge and time in chronological order

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