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. Here we 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 southwestern and south‐central U.S. aquifers, totaling −90 km3over 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 coefficients,
This content will become publicly available on February 1, 2025
- Award ID(s):
- 2044704
- PAR ID:
- 10492647
- Editor(s):
- Zhang, Kai
- Publisher / Repository:
- Science of the Total Environment
- Date Published:
- Journal Name:
- Science of The Total Environment
- Volume:
- 912
- Issue:
- C
- ISSN:
- 0048-9697
- Page Range / eLocation ID:
- 169476
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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