1Department of Civil Engineering, National Institute of Technology Raipur, Raipur, India
2Dept. of Electronics and Communications Engineering, Gayatri Vidya Parishad College of Engineering, Visakhapatnam, India
Online Published on 20 August, 2024.
In this paper, a study has been performed to understand the variations of hydrology and rice crop productivity during different El-Nino and La-Nina events in Kharun river watershed of Chhattisgarh, in India, using Soil and Water Assessment Tool (SWAT). Based on the National Oceanic and Atmospheric Administration (NOAA), affected years by El-Nino and La-Nina events are obtained between the duration of 35 years of analysis i.e. from 1981 to 2015. Result shows less rainfall and crop yield during El-Nino and normal rainfall and increased crop yield during La-Nina years. The validation results using SWAT shows good statistical results i.e. R2 and NSE > 0.6, RSR < 0.6 and PBIAS under ±15 for stream flow and R2 > 0.7 and PBIAS under ±10 for rice crop productivity; hence these studies are vital tool for policy makers for decision making of planning in the disaster management schemes.
El-Nino, La-Nina, Rice crop yield, Stream flow, Soil and water assessment tool
