Irrigation Engineering
According to Lacey, in regime conditions

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

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Irrigation Engineering
A divide wall is provided

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

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