Irrigation Engineering
According to Lacey, in regime conditions

Neither (a) nor (b)
Both (a) and (b)
Silt is kept in suspension by vertical components of eddies
Entire cross-section of the channel is generated at all points by the forces normal to the

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Irrigation Engineering
A divide wall is provided

At an inclination to the axis of weir
At right angle to the axis of weir
Parallel to the axis of weir and upstream of it
Parallel to the axis of weir and downstream of it

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