A case study on water balance using rooftop rainwater
2014
Ray, Lala I.P. | Moulick, S. | Mal, B.C. | Senthilvel, S. | Natrajan, P.
In XIᵗʰ five year plan of India; water is given prime importance in all the developmental sectors. So, its conservation is given topmost importance. In addition to conservation, the management of conserved water is a matter of concern in order to overcome the fascinating problems on water scarcity. A structure was constructed along with all system components to collect rooftop rainwater through a net work of pipelines and its efficacy was monitored in meeting the portable and non-portable water demands for a projected roof surface area of 624 m² at Soil and Water Conservation Engineering (SWCE) workshop building of Tamil Nadu Agricultural University (TNAU), Coimbatore. Weekly water balance reveals that 37ᵗʰ to 48ᵗʰ week got a surplus supply of rainwater after meeting all demands. It has been found that per annum a sizable amount i.e. 294.4 m³ of rain water can be harnessed from its rooftop during rain, which indicates a good potential for harvesting rooftop rainwater. The designed structure is found to work well to meet the portable water demand of the SWCE workshop complex.
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