Question

Factors affecting sedimentation in water treatment

Answer 1

Factors affecting sediment transport are:
1. Velocity and depth of flow
2. Size of sediment particle 
3. Geometry of cross section 
4. Course of river flow 

clear water condition may be followed in an open channel only if the velocity is as minimum as to allow particles to settle down. Settling velocity of different particles can be calculated by using Stoke's Law. 
For analogy, take a rectangular sedimentary tank, where (length)/(flow velocity) should be greater than or equal to (depth)/(settling velocity of slowest settling particle).

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