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Hydrogeological investigations at the Membach station, Belgium, and application to correct long periodic gravity variations

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Van Camp, M. Vanclooster, Marnik [UCL] Crommen, O. Petermans, T. Verbeeck, K. Dassargues, Alain [UCL]

[1] A comprehensive hydrogeological investigation regarding the influence of variations in local and regional water mass on superconducting gravity measurements is presented for observations taken near the geodynamic station of Membach, Belgium. Applying a regional water storage model, the gravity contribution due to the elastic deformation of the Earth was derived. In addition, the Newtonian gravity effect induced by the local water mass variations was calculated, using soil moisture observations taken at the ground surface (about 48 m above the gravimeters). The computation of the gravimetric effect is based on a digital elevation model with spatially discretized rectangular prisms. The obtained results are compared with the observations of a superconducting gravimeter (SG). We find that the seasonal variations can be reasonably well predicted with the regional water storage model and the local Newtonian effects. Shorter-period effects depend on the local changes in hydrology. This result shows the sensitivity of SG observations to very local water storage changes.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2006
Language Anglais
Journal information "Journal of Geophysical Research" - Vol. 111, no. B10 (2006)
Peer reviewed yes
Publisher Amer Geophysical Union (Washington)
issn 0148-0227
Publication status Publié
Affiliation UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire
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Bibliographic reference Van Camp, M. ; Vanclooster, Marnik ; Crommen, O. ; Petermans, T. ; Verbeeck, K. ; et. al. Hydrogeological investigations at the Membach station, Belgium, and application to correct long periodic gravity variations. In: Journal of Geophysical Research, Vol. 111, no. B10 (2006)
Permanent URL http://hdl.handle.net/2078.1/38177