Elastic deformation as a tool to investigate watershed storage connectivity

Autor: Noah Clayton, Ellen Knappe, Alissa M. White, Hilary R. Martens, Donald F. Argus, Nicholas Lau, Adrian A. Borsa, Rebecca Bendick, W. Payton Gardner
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Communications Earth & Environment, Vol 5, Iss 1, Pp 1-9 (2024)
Druh dokumentu: article
ISSN: 2662-4435
DOI: 10.1038/s43247-024-01264-3
Popis: Abstract Storage-discharge relationships and dynamic changes in storage connectivity remain key unknowns in understanding and predicting watershed behavior. In this study, we use Global Positioning System measurements of load-induced Earth surface displacement as a proxy for total water storage change in four climatologically diverse mountain watersheds in the western United States. Comparing total water storage estimates with stream-connected storage derived from hydrograph analysis, we find that each of the investigated watersheds exhibits a characteristic seasonal pattern of connection and disconnection between total and stream-connected storage. We investigate how the degree and timing of watershed-scale connectivity is related to the timing of precipitation and seasonal changes in dominant hydrologic processes. Our results show that elastic deformation of the Earth due to water loading is a powerful new tool for elucidating dynamic storage connectivity and watershed discharge response across scales in space and time.
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