Sensitivity Analysis through SWAT model for Sirsa River Basin in Western Himalaya

Authors

  • Narender Verma Department of Geography, Banaras Hindu University
  • Pratik Dash Department of Geography, Banaras Hindu University

Keywords:

Evapotranspiration, hydrological model, hydrological response units, sensitivity, SWAT

Abstract

In this paper an attempt has been made to perform sensitivity analysis of various
hydrological variables through SWAT model for Sirsa river basin, an unguaged basin, in
Western Himalayas. The study used remote sensing data derived evapo-transpiration(ET) to
parameterize SWAT model through manual calibration. For this study twelve sub-basins
using fifth order stream as threshold were delineated from Aster Dem. These were further
subdivided into 179 HRUs by overlaying land use landcover(LULC), soil and slope layers.
Climate input parameters were loaded to run the model for the period of 2001-2008, considering
first three years as warm-up period. After initial SWAT run, sensitivity analysis was performed
based on Latin LH-OAT method. From sensitivity analysis groundwater related parameters
(GWQMN, REVAPMN, GW_REVAP and RCHR_DP), soil related parameters (SOL_Z,
SOL_AWC and SOL_K) and HRU related parameters (EPCO, ESCO and CANMX) were
found to be most sensitive.

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Published

01-04-2022

How to Cite

Verma, N. ., & Dash, P. . (2022). Sensitivity Analysis through SWAT model for Sirsa River Basin in Western Himalaya. National Geographical Journal of India, 62(3), 245–258. Retrieved from https://ngji.in/index.php/ngji/article/view/472