Irrigation Engineering
According to Khosla, the exits gradient of surface flow

Is independent of the b/d ratio
Depends upon the b/d ratio
Is independent of the depths of d/s cut off walls
None of these

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Irrigation Engineering
Lacy's regime condition is obtained if

Silt charge in the channel is variable
Silt grade in the channel is variable
Channel flows in unlimited, incoherent alluvium of the same character as that transported material
Discharge in the channel is variable

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