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Groundwater withdrawals in the western US are a critical component of the water resources strategy for the region. Climate change already may be substantially altering recharge into groundwater systems; however, the quantity and direction (increase or decrease) of changes are relatively unknown as most climate change assessments have focused on surface water systems. We propose to conduct a broad scale literature review followed by a synthesis of available data, analysis and simulations with available downscaled climate scenarios to understand how recharge in the western US might respond to plausible climatic shifts during the rest of the 21st Century. We will produce an estimated range of impacts on groundwater...
Categories: Data,
Project;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: All Working Groups,
Climate,
Completed,
Groundwater,
Land Resources, All tags...
Water Resources, Fewer tags
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This project aims to better characterize how the changing climate of the Southwest is affecting cool and warm season precipitation in the Colorado River basin, and the corresponding response of streamflow in select individual sub-basins. The principal research objective is to assess whether the level of complexity of downscaling, applied to the official global climate change projection models used by the Intergovernmental Panel on Climate Change (IPCC), substantially affects resultant future streamflow projections used for operational planning purposes. The current methodological standard used for future streamflow projection by the US Bureau of Reclamation (BOR) applies the Bias Correction and Spatial Disaggregation...
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Although groundwater is a major water resource in the western U.S., little research has been done on the impacts of climate change on groundwater storage and recharge in the West. Here we assess the impact of projected changes in climate on groundwater recharge in the near (2021-2050) and far (2071-2100) future across the western U.S. Variable Infiltration Capacity model was run with RCP 6.0 forcing from 11 global climate models and “subsurface runoff” output was considered as recharge. Recharge is expected to decrease in the West (-5.8 ± 14.3%) and Southwest (-4.0 ± 6.7%) regions in the near future and in the South region (-9.5 ± 24.3%) in the far future. The Northern Rockies region is expected to get more recharge...
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