RUNOFF MODELING FOR MALAPRABHA SUB-BASIN USING SWAT HYDROLOGICAL MODEL

Priyanka, Nagraj S. Patil

Abstract: Water being one of the very important natural resources whose management has become the ultimate challenge facing today. As the population is growing impulsively, the demand for water is also increasing intensively. Demanding urbanization and the expansion of industries and development in agricultural practices also add up to the increasing demand for water. It is very much essential to manage the resource and use it wisely. With this perspective, hydrological modeling plays a vital role which can act as an important tool for the assessment of water functioning at the basin scale. In the present study, the Soil and Water Assessment Tool (SWAT), a mathematical model which aims at improving land and water quality supporting land use planning with greater potential is interfaced with ArcGIS software has been used to estimate runoff for Malaprabha sub-basin. The model is calibrated and validated using observed runoff. Calibration is done manually. The model was calibrated and validated using observed runoff for the period 1982-1989. The model was calibrated for the period 1982-1985 and validated for the period 1986- 1989.By this study we come to know that SWAT can be used to simulate runoff process in Malaprabha Sub-basin. The study found that the observed values showed good agreement with the simulated Flow with corresponding optimal set of parameters.

Keywords: Hydrological model, Runoff, SWAT model, Malaprabha Sub-basin

DOI: https://doi.org/10.15623/ijret.2016.0507007