RESERVOIR FLOOD ROUTING STUDIES AND BACKWATER COMPUTATION WITH ,SPECIAL REFERENCE TO SRISAILAM PROJECT (ANDHRA PRADESH)

Abstract

Srisailam hydroelectric project envisages construction of a 472 ft high masonry dam on River rtsbna, in the state of Andhra Pradesh. The backwater created by the dam will submerge about ninety villages and a lakhjot cultivated land, uproot a hags population exceeding 56,000 and affect two Important towns of Kurnool and A apur and the villages of Kyatur and Jatpol speciiliy in high floods. Two road bridges and two railway bridges situated on the foreshores of the reservoir would also be affected. The present dissertation aines at a study of the backwater effects of Srisailara dam with special reference to the above problems. A critical review of the existing flood routing practices and also of the current practices of the back. water profile computations is made. Computations are made for routing floods of 10; L00 and 1000 year frequencies through the reservoir for different modes of Sate operation. Using the resultsot flood routing studies thus made, the computations for the backwater profiles for the reservoir have been done. Finally, necessary recommendations for the acquisition of lands and village sites, protection of important towns and villages and the modifications necessary at the existing road and :railway bridges have been proposed# based on the backwater studies made.