Impact of Rooftop Rainwater Harvesting for Groundwater Recharge

Abstract

A rooftop rainwater harvesting structure was constructed and the design of filtration unit for ground water recharge evaluated for four years. The other structure constructed at the university library recorded an average of 0.3 million litres groundwater recharge. The success led to construction of six more structures at different places, and currently 20 structures have been established at different places in Punjab under the technical guidance of the university. In the year 2007, eleven structures were evaluated and found that they contributed about 2.01 million litres of rainwater as groundwater recharge. The study revealed that there was a need to adopt this technique at mass level to get significant results. This would be possible only with the help of people, participation. The possibilities to motivate the people for adoption of the technique at mass level have been reviewed.