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- Kumar, SandeepIndian Institute of Technology (author)
Groundwater monitoring and characterization by a vertical dipole of superconducting gravimeters in a karst aquifer, France
- Article/chapterEnglish2021
Publisher, publication year, extent ...
- 2021-09-01
- Society of Exploration Geophysicists,2021
Numbers
- LIBRIS-ID:oai:research.chalmers.se:c176aeae-a80b-4d96-92af-b886cefd87c9
- https://doi.org/10.1190/segam2021-3582839.1DOI
- https://research.chalmers.se/publication/527766URI
Supplementary language notes
- Language:English
- Summary in:English
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Notes
- The Earth's mass distribution is continuously changing due to physical processes taking place either beneath the subsurface or on the surface. Some of the primary sources for these mass variations are tides in the ocean and solid Earth, atmospheric disturbances and seasonal climate changes. The development of Superconducting Gravimeters (SGs) has made it possible to characterize and monitor such mass variations at micro scales. Our study focuses on the LSBB karst catchment's hydrodynamics using a unique configuration of two SGs located 520 m depth apart. The installation of a SG (iGrav-31) at the surface of the LSBB several years after the installation of the first (iOSG-24) inside the tunnel has provided several new insights into the understanding of hydrological processes occurring in the LSBB. In this work, we compare differential and residual gravity time-series together with the ERA5 global hydrological loading model. In the subsequent section, we implement a rectangular prism method to compute forward gravity responses using input from the hydrological model. We also numerically evaluate and validate the already published hypotheses (Mouyen et al., 2019) about uncertainties related to groundwater storage's location in this catchment. Based on our observations, we find that most water-storage changes occur in the unsaturated karst zone between both SGs. The misfit between the residual gravity time-series and the local hydro-gravity effect computed from ERA5 model shows large lateral fluxes and rapid runoff occurring in the LSBB. Finally, we conclude this work by examining the radial and depth sensitivity of water masses' effect near the SGs, and enlisting some recommendations for further studies.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap Geofysik hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Geophysics hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap Oceanografi, hydrologi och vattenresurser hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Oceanography, Hydrology and Water Resources hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap Multidisciplinär geovetenskap hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Geosciences, Multidisciplinary hsv//eng
Added entries (persons, corporate bodies, meetings, titles ...)
- Rosat, SéverineUniversité de Strasbourg,University of Strasbourg (author)
- Hinderer, JacquesUniversité de Strasbourg,University of Strasbourg (author)
- Mouyen, Maxime,1982Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)maxime (author)
- Indian Institute of TechnologyUniversité de Strasbourg (creator_code:org_t)
Related titles
- In:SEG Technical Program Expanded Abstracts: Society of Exploration Geophysicists2021-September, s. 889-8931052-38121949-4645
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