RAINFALL-RUNOFF MODELLING OF BETWA BASIN USING SWAT TOOL

Abstract

The hydrologist is under stress that how to analyze the catchment so that it could manage it properly and develop water resource project. To reduce their complexity in analyzing various engineering problems like reservoir storage, flood protection, forecasting, drainage system design

Hydrologists used hydrological modeling so that he could give a solution to the difficult problem. To find runoff from Betwa basin which comes under the Ganga basin, ArcSWAT software have been used along with ArcGIS software

In Actual, SWAT is distributed parameter model which be used to find surplus water, erosion, residue from land.

In this study, we delineate our catchment area by the use of DEM (Digital Elevation Model) and we got 33 sub-basin in our study area. After the creation of Land use map, soil map and slope map in swat model, we got 271 HRU ( hydrological response unit) and have given 25 years of daily rainfall, minimum and maximum temperature data

Model is simulated for 25 years in which calibration have been done from 1990 to 2000 and taken two year as warm-up period which gives result R

2 = 0.89 , NS = 0.58 and validation have been done from 1999 to 2013 and taken two years as warm-up period which give result R

2 = 0.90 and NS = 0.34.