Assessment of Water Resource Potential for Rainwater Harvesting through Farm Ponds in a Agricultural Watershed

摘要

The present study was taken up in Hirekere watershed which drains to Krishna river through Nallavagu stream and is located near Singanodi and Mandalgeri villages in Raichur district of Karnataka. The normal rainfall of the study area is 632 mm. The mean maximum temperature varies from 30.3°C in December to 40.6°C in May while the minimum temperature ranges from 15.7 °C in December to 25.3 °C in May. Taking 10% of 70% probable annual runoff as the threshold water conservation in order to allow the cultivation in downstream of the tank, it is suggested to have 20 farm ponds each having a capacity of 250 m~3 in the watershed.