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Schematic of a sediment retention pond SRP.

Mar 27, 2017

Wide shallow level spillway over existing ground where possible, retaining the existing grass cover. Bare areas to be stabilised with concrete, geotextile or other armouring. Secure the ends of the level spreader by burying within the earth bund and haunching with concrete. Bund/diversion channels to ensure all flow enters at the inlet end. Sediment forebay (1m deep and 2m wide). Level spreader full width of inlet end, batter into pond to be stabilised with soft matting geotextile. Extra crest width may be required to provide for machinery access for cleaning out. Floating decants. All bare surfaces to be stabilised with vegetation if the pond is to remain through a winter period, otherwise just the outer batter needs to be stablised. Floor of pond slopes towards entry. Baffles, with tops at dead water level. Pinned geotextile overlaid with large rock to break up flow. Use a rope and pulley system to lift decants out of water in the event of having to pump or drain water to the pond. Decants must be lowered once settling has occurred.

Schematic of a sediment retention pond SRP.