New insights on water storage dynamics in a mountainous catchment from superconducting gravimetry
| Autor: | Jean-Paul Boy, Daniel Viville, Frédéric Masson, Marie-Claire Pierret, Sylvain Pasquet, Jacques Hinderer, Nolwenn Lesparre, Jean-Daniel Bernard, Quentin Chaffaut |
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| Přispěvatelé: | Institut Terre Environnement Strasbourg (ITES), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Hydrology
Superconductivity geography geography.geographical_feature_category Loading of the Earth 010504 meteorology & atmospheric sciences [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Water storage Drainage basin 010502 geochemistry & geophysics 01 natural sciences 6. Clean water Hydrogeophysics Geophysics 13. Climate action Geochemistry and Petrology Time variable gravity Environmental science Gravimetry [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment 0105 earth and related environmental sciences |
| Zdroj: | Geophysical Journal International Geophysical Journal International, Oxford University Press (OUP), 2021, 228, pp.432-446. ⟨10.1093/gji/ggab328⟩ |
| ISSN: | 0956-540X 1365-246X |
| DOI: | 10.1093/gji/ggab328⟩ |
| Popis: | SUMMARY Assessing the spatial and temporal heterogeneity in subsurface water storage has strong societal and environmental implications, as it is key to assess the water availability for the ecosystem and society. This challenge is especially significant in mountainous areas, where the local population totally depends on springwater as a freshwater resource, while water storage dynamics is complex to evaluate because it exhibits spatiotemporal heterogeneities on all scales as a result of the topography. In this study, we compare the water balance of a headwater granitic catchment (CWB) with water storage changes assessed from in situ continuous gravity monitoring using an iGrav superconducting gravimeter (SGWSC) located at the summit of the catchment. We show that SGWSC and CWB exhibit a similar annual cycle, although they deviate in the months following winter peak flow events. We investigate the reasons for these discrepancies using a tank model adjusted to the SG signal. This shows that during these events, the effective discharge in the SG footprint area is much lower than the catchment streamflow. We attribute this difference in the drainage term to a lower contribution of the upper part of the catchment to the generation of peak flow, compared to the lower part. |
| Databáze: | OpenAIRE |
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