Illustrate the procedure of Ground water recharge pit with neat sketch.

Illustrate the procedure of Ground water recharge pit with neat sketch.
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1 Answer

Answer :

Procedure:

1) It is adopted for buildings having roof area up to 100 sq m. recharge pit of any shape is constructed generally 1 – 2 m wide and 2 – 3 m deep.

2) The pit is filled with boulders, gravel and sand for filtration of rain water.

3) Water entering in to rain water harvesting structure should be silt free.

4) Top layer of sand of filter should be cleaned periodically for better ingression of rain water in to sub-soil.

5) This method is suitable where permeable strata is available at shallow depth

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