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Coupling groundwater modeling and biological indicators for identifying river/aquifer exchanges.
Didier Graillot1, Frédéric Paran1, Gudrun Bornette2
1UMR 5600 Environnement Ville et Société, CNRS, Ecole Nationale Supérieure des Mines de Saint-Etienne, 158 Cours Fauriel, F-42023 Saint-Etienne Cedex 2, France.
Springerplus
|February 26, 2014
Summary
Understanding river-groundwater interactions is crucial for sustainable water management. This study combines groundwater modeling with biological markers to accurately map and quantify these vital hydrological exchanges.
Area of Science:
- Environmental Science
- Hydrogeology
- Ecology
Background:
- Climate change and human activities are altering river-groundwater dynamics.
- Accurate quantification of these interactions is essential for sustainable water resource management.
- Existing analytical methods require enhancement for comprehensive characterization.
Purpose of the Study:
- To propose an interdisciplinary approach for characterizing river-groundwater hydraulic interactions.
- To evaluate the benefits of coupling groundwater modeling with biological markers.
- To improve the calibration of groundwater models and assess the utility of biological indicators.
Main Methods:
- Development of independent diagnostic maps of hydrological exchanges using hydrogeological modeling.
- Utilization of biological indicators to map surface water-groundwater interactions.
- Comparative analysis of independently generated maps to understand exchange dynamics.
- Integration of biological indicators as a potential substitute for extensive piezometric measurements.
Main Results:
- Independent maps of hydrological exchanges were successfully created at the sector scale.
- Comparison of maps enhanced the quantitative and qualitative understanding of groundwater-surface water interactions.
- Groundwater model calibration was significantly improved by better defining boundary zones.
- Conditions for using biological indicators in lieu of numerous piezometric measurements were identified.
Conclusions:
- The combined approach of groundwater modeling and biological markers offers a robust method for characterizing river-groundwater interactions.
- This interdisciplinary strategy enhances model accuracy and provides insights into hydrological processes.
- Biological indicators show promise as a cost-effective alternative to traditional monitoring methods.
- The integrated tools can support decision-making for effective water resource management and pollution risk mitigation.
