25.-Flood forecasting and warning system for back water affected areas of Sardar Sarovar Projects

Abstract

Sardar Sarovar is an interstate, multipurpose termin-.1 project on river Narmada. The top R.L. of dam is 146.50 m but some blocks of main dam are still under construction and existing at a height of 85.0 m. The work of dam started.long back i.e. in the year 1980 but due to various problems specially not able to complete Resettlement and Rehabilitation, the progress on main dam is lagging and may take some more years to construct the dam to full height. Due to partial construction of Dam, lake is formed and u/s areas are affected due to backwater of SSP during floods. Still some villages situated above 90 m R.L. in the submergence area are not shifted, it is therefore necessary to issue flood forecast warnings for these villages. The paper discusses the problem involved, methodology for back water level forecasting, present status of the system and suggestions for improvement.