Roof Water Harvesting
In Water and Land Management Institute, there are many tubewells located nearby administrative block, residential campus, mess and hostel. In view of increasing demand of water for hostel and landscaping, installation of rainwater harvesting system was planned, with principal objective recharging the tubewell. Installation of the system would also serve to increase awareness of artificial recharge among trainees.
Roof water harvesting is the technique through which rainwater is conserved. Through this technique the rainwater is collected and stored in surface for underground tanks or recharged directly to shallow or deep aquifers. The main objective of roof water harvesting is to ensure water availability in future. The rooftop rainwater harvesting system in WALMI was installed with the consultation of National Institute of Hydrology. In the system, rainwater rainwater received on 250 square metre of hostel roof area has been diverted to nearby tubewell. Bhopal receives an average rainfall of 1100 mm annually. Conservation capacity is normally taken as 0.8. On multiplying area of only one roof with average rainfall and conservation capacity, it is estimated that total 2.2 lac liters could be conserved annually for recharging the tubewell.