Monitoring ground water storage at mesoscale using seismic noise: 30 years of continuous observation and thermo-elastic and hydrological modeling

Abstract : Groundwater is a vital freshwater resource for both humans and ecosystems. Achieving sustainable management requires a detailed knowledge of the aquifer structure and of its behavior in response to climatic and anthropogenic forcing. Traditional monitoring is carried out using piezometer networks, and recently complemented with new geophysical or satellite-based observations. These techniques survey either local (small-scale) water systems or regional areas (large scale) but, to date, adequate observation tools are lacking at the water management scale (i.e. several tens of kms), which is generally explored by modeling. Using 30 years of continuous recording by four seismic stations of the Gräfenberg Array (Germany), we demonstrate that long-term observations of velocity variations (approximately 0.01%) of surface waves can be extracted from such recordings of ocean-generated seismic noise. These small variations can be explained by changes to mechanical properties of the complex aquifer system in the top few hundred meters of the crust. The velocity changes can be interpreted as effects of temperature diffusion and water storage changes. Seismic noise recordings may become a new and valuable tool to monitor heterogeneous groundwater systems at mesoscale, in addition to existing observation methods.
Type de document :
Article dans une revue
Scientific Reports, Nature Publishing Group, 2017, 7, pp.Art. n°14241 〈10.1038/s41598-017-14468-9〉
Liste complète des métadonnées

Littérature citée [64 références]  Voir  Masquer  Télécharger

https://hal-insu.archives-ouvertes.fr/insu-01625976
Contributeur : Isabelle Dubigeon <>
Soumis le : lundi 30 octobre 2017 - 09:38:50
Dernière modification le : mardi 29 mai 2018 - 12:51:02
Document(s) archivé(s) le : mercredi 31 janvier 2018 - 12:34:20

Fichier

lecocq-2017.pdf
Publication financée par une institution

Licence


Distributed under a Creative Commons Paternité 4.0 International License

Identifiants

Collections

Citation

Thomas Lecocq, Laurent Longuevergne, Helle Pedersen, Florent Brenguier, Klaus Stammler. Monitoring ground water storage at mesoscale using seismic noise: 30 years of continuous observation and thermo-elastic and hydrological modeling. Scientific Reports, Nature Publishing Group, 2017, 7, pp.Art. n°14241 〈10.1038/s41598-017-14468-9〉. 〈insu-01625976〉

Partager

Métriques

Consultations de la notice

258

Téléchargements de fichiers

28