Assessing hydrothermal groundwater flow path using Kohonen's SOM, geochemical data, and groundwater temperature cooling trend

Environmental Science and Pollution Research International
Belgacem Agoubi

Abstract

Assessing groundwater flow path in a thermal aquifer, such as El Hamma aquifer, southeastern Tunisia, and its lateral communication with the adjacent Jeffara-Gabes aquifers, is a very complex operation which requires the integration of several approaches to understand and explain the reality of phenomenon. In this study, geochemical and isotopic data, Kohonen self-organizing map, temperature cooling trend, and kriging techniques were used to assess groundwater flow path in hydrothermal aquifer of El Hamma-Gabes, Tunisia. For this objective, 32 sampled wells are analyzed for major ions, electric conductivity, pH, total dissolved solids, and stables isotopes (δ2H and δ18O). Geochemical diagrams reveal that groundwater chemistry was controlled by evaporation, and rock-water interaction with a dominant water facies was Cl·SO4-Na·Ca-Mg. Kriging techniques were used to highlight groundwater flow path. Kohonen self-organizing map shows that the waters are clustered into three classes according to chemical and isotopic composition. These clusters represent a hydrothermal groundwater class from the Continental Intercalaire aquifer, a shallow groundwater class corresponding to Jeffara-Gabes aquifer and mixed water class. Groundwater cool...Continue Reading

References

May 8, 2004·Annales de réadaptation et de médecine physique : revue scientifique de la Société française de rééducation fonctionnelle de réadaptation et de médecine physique·B LefèvreP Moretto
Dec 6, 2005·Ground Water·Andrea Cortis, Brian Berkowitz
Feb 6, 2008·IEEE Transactions on Neural Networks·J Vesanto, E Alhoniemi

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Citations

Aug 25, 2021·The Science of the Total Environment·Chung-Mo LeeSe-Yeong Hamm
Oct 1, 2021·Environmental Science and Pollution Research International·Zakaria OuzerbaneMohamed Berrada

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