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Impact Of Climate Change On Irrigation Water Availability, Crop Water Requirements And Soil Salinity In The Sjv, Ca, Jan Hopmans, Edwin P. Maurer
Impact Of Climate Change On Irrigation Water Availability, Crop Water Requirements And Soil Salinity In The Sjv, Ca, Jan Hopmans, Edwin P. Maurer
Civil, Environmental and Sustainable Engineering
We examine potential regional-scale impacts of global climate change on sustainability of irrigated agriculture, focusing on the western San Joaquin Valley in California. We consider potential changes in irrigation water demand and supply, and quantify impacts on cropping patterns, groundwater pumping, groundwater levels, soil salinity, and crop yields. Our analysis is based on archived output from General Circulation Model (GCM) climate projections through 2100, which are downscaled here to the scale of the study area (~30 km across). We account for uncertainty in GCM climate projections by considering output from two different GCM's, each using three greenhouse gas emission scenarios. …