CLIMATE CHANGE EFFECT ON WATER RESOURCES USING CLIMATE MODEL DATA OF INDIAN RIVER BASIN

Naga Sowjanya.P, Venkat Reddy.K, Shashi.M

Abstract: In context of climate change it is necessary to quantify the impact on water resources for efficient use and management. It generates significant runoff in river basins, which is the main source of water for all sectors. Climate change is the prime influencing factor in occurrence of monsoon that leads to runoff variations in Indian river basins. Hence, it is necessary to assess the impact of climate change on water resources. The ability to estimate the effect of climate change on water resources depends on the availability of climate model database. Present paper focuses on the effects climate change on water resources for the part of Krishna river basin, India using climate model database in Soil and Water Assessment Tool (SWAT) model. SWAT calibration and uncertainty program (SWAT-CUP) is used for the model calibration, sensitivity and uncertainty analysis. The climate model database used in the study is Coordinated Regional Climate Downscaling Experiment (CORDEX) of South Asia downscaled using Global Circulation Models (GCM) of Coupled Model Inter comparison Project Phase 5 (CMIP5). Based on the results it is observed that decrease in the precipitation, minimum temperature and maximum temperature influence the mean monthly stream flow patternsIn context of climate change it is necessary to quantify the impact on water resources for efficient use and management. It generates significant runoff in river basins, which is the main source of water for all sectors. Climate change is the prime influencing factor in occurrence of monsoon that leads to runoff variations in Indian river basins. Hence, it is necessary to assess the impact of climate change on water resources. The ability to estimate the effect of climate change on water resources depends on the availability of climate model database. Present paper focuses on the effects climate change on water resources for the part of Krishna river basin, India using climate model database in Soil and Water Assessment Tool (SWAT) model. SWAT calibration and uncertainty program (SWAT-CUP) is used for the model calibration, sensitivity and uncertainty analysis. The climate model database used in the study is Coordinated Regional Climate Downscaling Experiment (CORDEX) of South Asia downscaled using Global Circulation Models (GCM) of Coupled Model Inter comparison Project Phase 5 (CMIP5). Based on the results it is observed that decrease in the precipitation, minimum temperature and maximum temperature influence the mean monthly stream flow patterns

Keywords: Climate Change, Climate Model Database, SWAT, Water Resources

DOI: https://doi.org/10.15623/ijret.2015.0423025