Defence Colony

The P-4 Partners

Community Partner: DEFENCE COLONY WELFARE ASSOCIATION

Funding Partner: COCA-COLA INDIA

Expert Advice: CENTRAL GROUNDWATER BOARD

Government Support: DELHI JAL BOARD

Defence Colony is a locality in Central district of Delhi. Due to the overexploitation of the groundwater reserves the water table has been depleting at a rate of about 1 meter a year. Most of the houses in the area have installed tube wells to augment the water supply from Delhi Jal Board.

It is very important therefore, to do Rainwater Harvesting in this area so that the groundwater levels are maintained. Recharge trenches with bore wells which join the aquifer at the water table will do effective recharge to groundwater.

Defence Colony is a planned colony with a well laid out storm water drainage network that is functional at most points. Based on the direction of flow of water in the storm water drains, flow on the road surface and availability of construction space, many sites have been identified for construction of rainwater harvesting structures. Of these, 4 sites have been selected for the current project.

TECHNICAL DETAILS OF RAINWATER HARVESTING PROJECT

Watershed details –

Average Annual Rainfall 611 mm / yr

Land use type Urban, Residential

Total area considered for recharge 14000 sq.m. of paved / cemented / road area

and 1200 sq.m. of unpaved area(this is the area that comprises the catchment area for the runoff that will flow into the two proposed structures)

Geological and hydro-geological details -

Geological formation Alluvium underlain by quartzite

Depth to water table 20 m below ground level

Water Available for recharge 6,000 cu.m. approx.

Back

If you like the content, please vote for it. Thanks.

Most Popular Posts

Defence Colony