Irrigation Engineering
As compared to gravity dams, earthen dams

require sound rock foundations
require less skilled labour
are costlier
are less susceptible to failure

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Irrigation Engineering
Lacy's regime condition is obtained if

Discharge in the channel is variable
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

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