A Study on Demand Water Supply through Buried Pipe System for Efficient Irrigation in a Command Area of a Tank

摘要

The tank command areas of south Karnataka are vulnerable for erratic rains and insufficient supply of water, because of losses to the extent of 50 per cent due to seepage, percolation and evaporation in transit from the storage reservoir to the farmer’s field. In order to minimize the losses in conveyance of water from the source to the target site, the buried pipe distributory systems have beenuddesigned and developed, which is the first of its kind for tank command irrigation with the adoption of solar pump to lift water from the jack well in order to reduce the dependence on the erratic electric supply at village level. The improved conveyance systems and advanced irrigation systems, which involve designs, construction, and field studies on agriculture with different perspective haveudbeen studied. The effect of on-demand water supply on different crops yield during kharif and rabi/summer 2003-04 to 2007-08 indicated that there was a significant change in the yield of crops and cropping pattern in command area due to intervention of ondemand water supply