Civil Engineering - Water Supply Engineering - Discussion

The Max value is 3m.

However, the practically max value is 3 m.

According to IS code 2m is minimum depth.

The maximum depth is 2.5 - 4m.

Maximum depth is 3.

Detention period: for plain sedimentation: 3 to 4 h, and for coagulated sedimentation: 2 to 2.5 h.

Velocity of flow: Not greater than 30 cm/min (horizontal flow).

Tank dimensions: L:B = 3 to 5:1. Generally L= 30 m (common) maximum 100 m. Breadth= 6 m to 10 m.

Circular: Diameter not greater than 60 m. generally 20 to 40 m.

Depth : 2.5 to 5.0 m (3 m).

Surface Overflow Rate: For plain sedimentation 12000 to 18000 L/d/m2 tank area; for thoroughly flocculated water 24000 to 30000 L/d/m2 tank area.

Slopes: Rectangular 1% towards an inlet and circular 8%.

Sedimentation tanks are independent of the depth of the tank. Max depth may be anything.

Is it not too high?