Design a rectangular sedimentation tank treating 2.5×106 litre/day. The size of tank is  17.5 × 5.5 × 3.5 m. if 80 ppm suspended solids are present in the water, assuming 75% removal in the basin and the average specific gravity as 2.0, determine:  i) Average flow of water through tank ii) Detention time iii) Deposition of the solids in the tank iv) Over flow rate

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.