Irrigation Engineering
If B and d are the bed width and depth of a channel in meters, the combined losses due to evaporation and seepage in cumecs per kilometer length of the channel, is

(1/200) × (B + d)2/3
(1/100) × (B + d)2/3
(1/50) × (B + d)2/3
(1/150) × (B + d)2/3

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Irrigation Engineering
In a syphon aqueduct

Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough
Drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough
Drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough
Canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough

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Irrigation Engineering
The flow-mass curve is graphical representation of

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

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