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- Title
A comparison of watershed storage trends over the eastern and upper Midwestern regions of the United States, 2003-2015.
- Authors
Thomas, Brian F.; Landerer, Felix W.; Wiese, David N.; Famiglietti, James S.
- Abstract
Basin-scale groundwater storage trends calculated from long-term streamflow records provide insight into the evolution of watershed behaviors. Our study presents the first spatially relevant validation of recession-based trend approaches by comparing three independent storage trend estimates using GRACE-derived groundwater storage, in situ groundwater elevation observations, and recession-based approaches for the time period of 2003-2015. Results documented consistent agreement between spatially interpolated groundwater observation trends and recession-based storage trends, while GRACE-derived groundwater trends were found to exhibit variable, poor comparisons. A decreasing trend in watershed storage was identified in the southeastern U.S. while increasing trends were identified in the northeast and upper Midwest estimated from recession-based approaches. Our recession-based approach conducted using nested watershed streamflow records identified variable watershed storage trends at scales directly applicable for comparative hydrology studies and for assisting in watershed-based water resources management decisions.
- Subjects
MIDWEST (U.S.); WATERSHED restoration; WATER storage; BASE flow (Hydrology); WATER supply management
- Publication
Water Resources Research, 2016, Vol 52, Issue 8, p6335
- ISSN
0043-1397
- Publication type
Article
- DOI
10.1002/2016WR018617