Irrigation Engineering
Regime conditions in a channel may occur if

Discharge is constant
Silt grade and silt charge are constant
All listed here
Channel flows uniformly in incoherent alluvium as that transported in suspension

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Irrigation Engineering
Effective precipitation for a crop may be defined as

Total precipitation minus the loss due to evaporation
Total precipitation during the crop period
Total precipitation minus the loss due to infiltration
Available water stored in soil within root zone of the crop

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