How Might Recharge Change Under Projected Climate Change in the Western U.S.?
AffiliationUniv Arizona, Dept Hydrol & Atmospher Sci
MetadataShow full item record
PublisherAMER GEOPHYSICAL UNION
CitationHow Might Recharge Change Under Projected Climate Change in the Western U.S.? 2017, 44 (20):10,407 Geophysical Research Letters
JournalGeophysical Research Letters
Rights©2017. American Geophysical Union. All Rights Reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractAlthough 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 in the near (+5.3 +/- 9.2%) and far (+11.8 +/- 12.3%) future. Overall, southern portions of the western U.S. are expected to get less recharge in the future and northern portions will get more. Climate change interacts with land surface properties to affect the amount of recharge that occurs in the future. Effects on recharge due to change in vegetation response from projected changes in climate and CO2 concentration, though important, are not considered in this study.
Note6 month embargo; published online: 28 October 2017
VersionFinal published version
SponsorsUSGS John Wesley Powell Center; NSF EAR [EAR-1328505]