Harvesting rain water
Harvesting and recycling rain water can meet up to 80 per cent demand for water in Chennai, according to a study by Alacrity, a Chennai-based housing development company.
The report "Self Reliance in Water -- the Alacrity Experience", says that harvesting rain water will reduce the dependence for water on the Chennai Metro Water Supply and Sewage Board. It will also recharge groundwater aquifer and reduce the adverse effects of sea water intrusion.
"The average rainfall in the city in the past 36 years works out to 128 cm," it says. This water, not only causes flooding, but runs wastefully into the sea. "If this abundant quantity of water is tapped and stored... households will be closer to self reliance in their water needs."
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