Roof Top Rain Water Harvesting in an Urban Area

ROOF TOP RAIN WATER HARVESTING IN AN URBAN AREA
SURAT (GUJARAT)

We got a lot of rain down, yet we do not have pee. Why? Because we have not reflected enough on the value of raindrop. The annual rain fall over India is computed to be 1170 mm. This is mettlesomeer compared to the global average of 800 mm. (1). However, this rainfall occurs during short spells of high intensity. Because of such intensities and short duration of heavy rain, most of the rain falling on the surface tends to flow away rapidly, divergence very little for the recharge of groundwater. This makes most parts of India exist insufficiency of water even for domestic uses.
The quality and the exploitable bill of ground water in SURAT were very good bank about 25 old age back and have deteriorated sooner badly since then. Certain areas in SURAT have even account of saline intrusion in the last five years or so.
The following activities have caused (and continue to do so) vast damage:
1. Increase in extraction due to augment in the number of houses/ flatcar complexes.
2.



Indiscriminate paving employment by the society all around the built up area at heart the compound, particularly by the builders of multi-storied residential and commercial complexes and by the state, while laying roads (without leaving any open space on either side) and pedestrian platforms. such(prenominal) activities prevent rain water from percolating into the soil and results in flooding. This is observable from the fact that flooding has increased over the years in almost all the metro cities in the country.

3. Total lack of sincere attempts by the residents harvest rain water within their respective premises. In a large majority of houses, flat complexes, commercial complexes, etc. the rooftop pipes are either directed towards toilet or allowed to run-off to the streets, either of them being against harvesting. The stagnant run-off water in the roads are collected through storm water drains and dumped into the sea.
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