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Assessment of Anticipated Climate Change Impact on Water Resources in Krishna Basin
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The Krishna, one of the longest rivers in southern India with a cultivable area, 77 per cent is experiencing steady changes in atmosphere with erratic rainfall, increased humidity and decreased temperatures. The prime objective is hydrological assessment of future monsoon and its uncertainties for sustainable crop production and irrigation water management practices in a changing climate. The impact of future climate change is assessed using calibrated and validated ArcSWAT modelling tool. The Basin on an average receives 800 mm rainfall in the monsoon period with least of 300mm in the south and a maximum of 2000mm in the west. The basin has surface water potential of 78.1 km3 and groundwater potential of 26.41 km3. The hydrological assessment of the basin based on the IPRC model shows that by midcentury there would be increase in flash floods with prolonged dry spells. The assessment on spatial and temporal distribution of water availability, precipitation, PET and soil water suggests the need for eco-friendly adaptation technologies along with a planned irrigation development to capture in abundance and supply in the deficient period, when the demand is more and a need for efficient crop model to understand and assist the flooding situation.
Keywords
Climate Change, Water Resources, SWAT Model, Krishna Basin.
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