Vol. 12, Special Issue 6 (2023)

Author(s):
M Shruthi, N Hari, R Rejani, K Srinivasa Kumar and K Charith Kumar

Abstract:
The main objective of this study is to identify suitable technological interventions for sustainable management based on runoff and soil loss under the current scenario using the Soil and Water Assessment Tool (SWAT) model.A SWAT model has been setup with the dataset of the upper Manair sub-basin and simulated total Runoff and soil loss from the sub-basin from 1951 to 2020. The model was calibrated from (2011-2015) and validated from (2016-2020). The two statistical model performance measures namely Nash Sutcliffe Efficiency (NSE) and coefficient of determination (R2) used in calibration and validation. The model has a predictive capability with R2 as 0.87 in calibration and 0.807 in validation and NSE as 0.79 in the calibration period and 0.65 in the validation period. The surface runoff 216.53 mm and Soil loss 9.45 t ha-1. Site selection for soil and water conservation measures is carried out by overlaying slope, soil, land use/land cover, and stream order maps. The sites for check dams and percolation tanks were identified in the agriculture and wasteland zone.The proposed structures will aid in improving the availability of groundwater resources.