STUDY OF WATER AVAILABILITY FOR RAMGANGA BASIN UPTO KALAGARH

Abstract

The establishment of relationship between rainfall and runoff is one of the basic problem in hydrology. Such relationships involving various factors affecting runoff are useful for extending runoff records by using rainfall records which are generally available for longer periods. The relationships range from simple rainfall versus runoff plots for different periods such as storm, monthly, or annual to very complicated rainfall runoff model. In the present study, the monthly rainfall-runoff relationships have been established for Ramganga river basin upto Kalagarh gauge site, for estimating the water availabi-lity using flow duration analysis procedure. The catchment area of Ramganga river upstream of the Kalagarh dam site is 3097.60 sq. km. Most of the area extends over a rugged and hilly terrain. The monthly average basin rainfall obtained from 5 external raingauge was available for 60 years. The between relationships/average basin rainfall obtained from 5 exter- nal raingauge station and corresponding average basin rain-fall obtained from internal raingauge station is established, to develop 6 0 years average basin rainfall.