Irrigation Engineering
Lacy's regime condition is obtained if

Silt charge in the channel is variable
Silt grade 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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Irrigation Engineering
Infiltration rate is always

more than the infiltration capacity
equal to or more than the infiltration capacity
less than the infiltration capacity
equal to or less than the infiltration capacity

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