MULTISTATION DAILY RAINFALL GENERATION FOR •BEAS CATCHMENT UPTO PONG DAM

Abstract

The development of water resources project, evaluation of water potential is necessary. Prediction of water yield gives information inadvance, on the.amount of water which is likely to be available at particular site. Such information is valuable in planning for development of water resources. The historical streamf low data constitutes just one sample from past which is unlikely to repeat in future. In hilly areas availability of streamflow data is limited due to diffi-cult terrain and inaccessible areas. The streamflow data is also affected by change in catchment characteristics while rainfall data is not affected by such changes. For such areas multisite rainfall generation is helpfull in providing alter-native samples by which longer period streamflow series can be obtained by suitable rainfall-runoff relationship. For generation of rainfall sequences by multisite generation technique, the available data of Beas catchment have been used. Methodology developed by Kraeger(1971) also used by Obesekera(1978) after some modifications, has been used to generate daily rainfall sequences for 12 raingauge stations (three at a time), viz. Dehragopipur, Palampur, Dharamshala (obs) , Jan j eh li, Pan j ain, Ban j ar, Hamirpur, Mandi (Sadar) , Bhangrott~, Jogindar Nagar, Kataula and Kulu spread over the Beas Catchment. As the technique generates the rainfall for three stations at a time, 12 raingauge stations were considered in four groups.