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

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

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Irrigation Engineering
Lacy's regime condition is obtained if

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

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