Hydraulic and geochemical impact of occasional saltwater intrusions through a submarine spring in a karst and thermal aquifer (Balaruc peninsula near Montpellier, France)

Hydraulic and geochemical impact of occasional saltwater intrusions through a submarine spring in a karst and thermal aquifer (Balaruc peninsula near Montpellier, France)

Submarine springs are a common discharge feature of the karst aquifers along the Mediterranean coast. In some instances, occasional and localized saltwater intrusions can occur through the submarine spring and negatively impact the quality of the groundwater resource. The hydraulic and geochemical b...

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Bibliographic Details
Published in:Hydrology and earth system sciences Vol. 24; no. 11; pp. 5655 - 5672
Main Authors: Pétré, Marie-Amélie, Ladouche, Bernard, Seidel, Jean-Luc, Hemelsdaël, Romain, de Montety, Véronique, Batiot-Guilhe, Christelle, Lamotte, Claudine
Format: Journal Article
Language:English
Published: Katlenburg-Lindau Copernicus GmbH 27-11-2020
European Geosciences Union
Copernicus Publications
Subjects:
Analysis
Aquifers
Coastal aquifers
Coasts
Discharge
Drinking water
Dynamics
Environment and Society
Environmental Sciences
Environmental studies
Geochemistry
Geology
Global Changes
Groundwater
Groundwater management
Groundwater quality
Groundwater resources
Humanities and Social Sciences
Hydraulics
Hydrodynamics
Hydrogeology
Isotopic tracers
Karst
Lagoons
Offshore
Perturbation
Piezometric head
Rare earth elements
Resource management
Saline water
Saline water intrusion
Salinity
Salt water intrusion
Saltwater encroachment
Saltwater intrusion
Sea level
Seawater
Seawater intrusion
Spring
Strontium 87
Strontium isotopes
Submarine springs
Tracers
Water resource management
Water resources
Water shortages
Water springs
Water supply
France
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Summary:Submarine springs are a common discharge feature of the karst aquifers along the Mediterranean coast. In some instances, occasional and localized saltwater intrusions can occur through the submarine spring and negatively impact the quality of the groundwater resource. The hydraulic and geochemical behaviour of a submarine spring discharging into the Thau Lagoon just offshore of the Balaruc peninsula near Montpellier, France, has been characterized to determine the impacts of such phenomena to better understand the dynamics of a regional karst aquifer and improve its groundwater management. This work is based on both historical and new hydrogeological and geochemical data, illustrating six occasional saltwater intrusion events (from 1967 to 2014) in the Thau Lagoon area (southern France).
ISSN:1607-7938
1027-5606
1607-7938
DOI:10.5194/hess-24-5655-2020