Groundwater-flow characterization in a multilayered karst aquifer on the edge of a sedimentary basin in western France
| Autor: | Roland Lastennet, Guillaume Lorette, Alain Denis, Nicolas Peyraube |
|---|---|
| Přispěvatelé: | Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB), Service National d'Observation sur le KARST (SNO Karst), Institut national des sciences de l'Univers (INSU - CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category Hydrogeology Baseflow 010504 meteorology & atmospheric sciences Groundwater flow 0208 environmental biotechnology Aquifer 02 engineering and technology Sedimentary basin Karst 01 natural sciences 6. Clean water 020801 environmental engineering Spring (hydrology) [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Geomorphology Geology Groundwater 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Journal of Hydrology Journal of Hydrology, Elsevier, 2018, 566, pp.137-149. ⟨10.1016/j.jhydrol.2018.09.017⟩ |
| ISSN: | 0022-1694 |
| DOI: | 10.1016/j.jhydrol.2018.09.017⟩ |
| Popis: | International audience; On the edge of sedimentary basins, burial of geological layers can involve the formation of confined karst aquifers. In some cases, relationships between confined and unconfined karst aquifers can exist and imply an increased difficulty in delineating contributive areas of karst system outlets with accuracy. This work aims to develop a multi-disciplinary approach to highlight groundwater exchanges between multilayered karst aquifers feeding a single spring.Toulon Springs, located in western France, provides the opportunity to study relationships between two multilayered karst aquifers. Hydrograph and chemograph analysis coupled with principal component analysis (PCA) are used to evaluate groundwater-flow origins on the northern edge of a sedimentary basin. Natural hydrodynamic responses (baseflow recession analysis, auto-cross correlation function) show an important volume of water located in a saturated zone of the Toulon karst system. Significant contrasts in water quality as a function of the hydrological regime (flood, recession, and baseflow regime) and comparison with shallow and deep water show the participation of a deep aquifer supporting the flow of Toulon Springs. |
| Databáze: | OpenAIRE |
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