Improvement In Performance Of A Reservoir System With Carry Over Storages
Carry-over storages are over-year storages and will be able to hold flows more than the yearly requirement whereas with-in -year storages are provided to take care of seasonal variations of flows. When there are insufficient flows in the initial period the carry over storages will help in meeting the demands of this period as the flows from the previous year are stored in the reservoirs. They will also be helpful in improving the system performance by meeting the demands in deficit years with the carried forward flows. Srisailam and Nagarjunasagar reservoirs in Krishna basin are provided as carry over storages. In this study an effort is made to study the effect of carry-over storages of Srisailam and Nagarjunasagar on the performance of the system of reservoirs Srisailam, Nagarjunasagar and Krishna delta of the Krishna system. The study concluded that the success rates of irrigation at Srisailam, Nagarjunasagar and Krishna delta have improved with carry over storages. The improvement is marginal at Srisailam but more than 13% for Nagarjunasagar and Prakasam Barrage.
Keywords - Carry-over storage, Irrigation demands, Srisailam, Nagarjunasagar, Prakasam Barrage