Climate change impact analysis on watershed using QSWAT

  • N. Nageswara Reddy
  • K. Venkata Reddy
  • J. Sri Lakshmi Sesha Vani
  • Prasad Daggupati
  • Raghavan Srinivasan
Article
  • 49 Downloads

Abstract

This study focuses on analysis of future climate change impacts on West Nishnabotna Watershed, using climate model data and an open source hydrological model—Soil and Water Assessment Tool (SWAT), which is run in Quantum Geographical Information System(QGIS) environment. The data required to simulate hydrological processes using SWAT plugin in QGIS (QSWAT) are Digital Elevation Model, land use/landcover map, soil map, slope map and climate data of the study area. The required climate parameters like maximum temperature, minimum temperature and precipitation are obtained from North American Regional Climate Change Assessment Program climate model database which are bias corrected for the study area using linear scaling method. SWAT model is setup using observed climate and the model calibration and validation is performed using SWAT Calibration and Uncertainty Program (SWAT-CUP). Simulations are run for historic (1971–1999) and future (2041–2069) climate conditions for the stream flow prediction. The climate change impact analysis like anomalies and trends in the hydrological regime of the watershed are carried out based on QSWAT simulation results.

Keywords

Climate change Watershed QSWAT Bias correction Hydrological anomalies 

Notes

Acknowledgements

Part of the work presented in this paper is carried out at Texas A&M University, College Station by the Second Author (Venkata Reddy K) as part of the Raman fellowship provided by the Government of India. We wish to thank Dr. Seth McGinnis and other scientists of North American Regional Climate Change Assessment Program (NARCCAP) for providing the data used in this paper.

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Copyright information

© Korean Spatial Information Society 2017

Authors and Affiliations

  1. 1.National Institute of TechnologyWarangalIndia
  2. 2.Department of Water Resources Engineering, School of EngineeringUniversity of GuelphGuelphCanada
  3. 3.Department of Ecosystem Science and ManagementTexas A&M UniversityCollege StationUSA

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