Rain water harvesting is being increasingly used all over
Kerala. The increasing population and residences have increased
the demand for water. Maximum utilization of water calls for the
use of rain water harvesting. Kochi flats are increasingly
emphasizing the use of rain water harvesting system. Rain water
harvesting is capturing rain where it falls or capturing the run
off. It is necessary to keep the water clean by not allowing
polluting activities in or around the catchment. Water
harvesting can be undertaken through a number of ways like
capturing runoff from rooftops, local catchments, seasonal
floodwaters from local streams and conserving water through
watershed management. The water thus saved can be used for
drinking, irrigation water, increasing groundwater recharge,
reducing storm water discharges, urban floods and overloading of
sewage treatment plants, reducing seawater ingress in coastal
areas. It is the activity of direct collection of rainwater. The
total amount of water that is obtained in t