Estimation of snow melts contributionin runoff using ɸ index method for Manali and Pandoh catchment

Abstract

Precipitation falls on the earth via various means such as Drizzle, Rain, snow, etc. out of this snowfall is the most important form for hilly catchment areas. In winter snow covers the hilly tracks and which contributes to the water in stream in the form of snow melts. This snow melts needs to be calculated by scientific methods in order to use it wisely. In this method ɸ index method is adopted and daily rainfall runoff data is used for 10 years (1991 to2000) to calculate the snow melts contribution in runoff for Manali and Pandoh catchment in Himachal Pradesh, After the analysis of data & statistical techniques it is used to determine % snow melts contribution, for Manali catchment the estimated snow melts contribution is about 48 to 52% and for Pandoh it is about 32 to 36%