ANNOUNCEMENTS
SWAT, which stands for Soil and Water Assessment Tool is a hydrological modelling software that can be used in Arc-GIS interface. It is by using SWAT that this project has simulated monthly discharge from 1981-2020 for river Ayad’s basin in Gogunda and Girwa blocks of Udaipur district of Rajasthan state of India. River connects and feeds into five lakes of Udaipur - Choti Madar, Badi Madar, Pichola, Fateh Sagar, and Udai Sagar. Udai Sagar is the ultimate outlet for entire watershed. The watershed covers an area of 586.5km2. 5 sub-basins and 85 hydrologic resource units (HRUs) were created for analysis. About 45% of basin has elevation between 526-614m. 75% area of watershed was covered with loam soil followed by no soil. About 36% area of basin was covered with scrub forest followed by crop land, deciduous forest and urban area. Daily data of precipitation, solar radiation, relative humidity, min/max temperature, and wind speed were used from NASA Power. Potential evapotranspiration was calculated from Penman-Montieth equation and run-off from SCS-CN method. Calibration and Validation was done by SUFI-2 in SWAT-CUP using proxy watershed of Berach sub-basin of Banas basin of India. Calibration was done for period Jan 1984-Dec 87 and validation from Jan 1988-Dec 90. R2 was found to be 0.79 and 0.71 and NSE was found to be 0.41 and 0.25 for calibration and validation respectively.
Keywords: SWAT, Surface Flow, R2, NSE, Proxy-watershed.
