REAPPRAISAL OF HYDROLOGY AND WATER RESOURCES OF PUTHIMARI IRRIGATION PROJECT, ASSAM

Abstract

Water potential is the most cheaply available natural resource for the benefit of mankind. The utility )f vast water power potential available in the north eastern region is very poor. d"tisscm, one of the north eastern states of India, has two major perennially flowing of river systems viz. the Brahmaputra and the Barak which control the hydrological phenomenon of the entire state. The river Puthimari is one of the major north bank tributaries of Brahmaputra, originating from foot hills of Bhutan. The state irrigation department of Assam proposed one irrigation project covering a gross command area of 204 sq, kin, on the basis of only ten years historical data of Puthimari river gauged at NH bridge site, at a distance of 40 ktn, downstream of proposed barrage site. In this study an effort has been made to make a reappraisal of the different features of the project covering the following topics s 1. (a) Future river flow have been generated through three -types of models and the different properties O4 observed and generated flow have been compared in order to select the appropriate model for this basin. (b) 75 percent dependable yields for each ten-daily period as well as annuals yields are determined.