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Comparison of Groundwater Storage Changes From GRACE Satellites With Monitoring and Modeling of Major U.S. Aquifers
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2020
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Source: Water Resources Research, 56(12)
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Journal Title:Water Resources Research
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Description:GRACE satellite data are widely used to estimate groundwater storage (GWS) changes in aquifers globally; however, comparisons with GW monitoring and modeling data are limited. Herewe compared GWS changes from GRACE over 15 yr (2002 –2017) in 14 major U.S. aquifers with groundwater ‐level (GWL) monitoring data in ~23,000 wells and with regional and global hydrologic and land surface models. Results show declining GWS trends from GRACE data in the six southwesternand south ‐central U.S. aquifers, totaling −90 km 3over 15 yr, related to long ‐term (5 –15 yr) droughts, and exceeding Lake Mead volume by ~2.5×. GWS trends in most remaining aquifers were stable or slightly rising. GRACE ‐derived GWS changes agree with GWL monitoring data in most aquifers (correlation
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Source:Water Resources Research, 56(12)
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DOI:
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ISSN:0043-1397;1944-7973;
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Rights Information:Other
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Compliance:Library
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