Hydrochemical and isotopic investigations as indicators of recharge processes of the Continental Intercalaire aquifer (eastern piedmont of Dahar, southern Tunisia)
Autor: | Zahra Dhaoui, Rachid Farouni, Jean-Denis Taupin, Kamel Zouari |
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Přispěvatelé: | École Nationale d'Ingénieurs de Sfax | National School of Engineers of Sfax (ENIS), Hydrosciences Montpellier (HSM), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) |
Jazyk: | angličtina |
Rok vydání: | 2016 |
Předmět: |
010504 meteorology & atmospheric sciences
Lithology δ18O Outcrop 0208 environmental biotechnology Geochemistry Soil Science Aquifer 02 engineering and technology 01 natural sciences Isotopes Environmental Chemistry Continental Intercalaire [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology Groundwater Wadi 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology Hydrology Global and Planetary Change geography geography.geographical_feature_category Geology Groundwater recharge Pollution 6. Clean water Recharge 020801 environmental engineering 13. Climate action Meteoric water |
Zdroj: | Environmental Earth Sciences Environmental Earth Sciences, Springer, 2016, 75 (16), pp.1186. ⟨10.1007/s12665-016-5990-x⟩ |
ISSN: | 1866-6280 1866-6299 |
Popis: | Groundwaters of the Continental Intercalaire sandstone formations at the eastern piedmont of Dahar (southern Tunisia), where they outcrop, were analysed to study the mineralization, the water origin and the current recharge process. Hydrochemical study shows that these waters present a spatial variability of chemical facies which is linked to the lithology of the host rock. The factors contributing to the mineralization are mainly the water-rock interaction in particular the dissolution of evaporitic minerals and the cation exchange reactions. Stable isotopes show an enrichment in delta O-18 and delta H-2 contents principally for piezometric levels closest to the surface, reflecting measures found in the current rainfall subject to a semi-arid to arid context. These results are coherent with those of C-14 and H-3 that allow the qualitative identification of a current recharge which could probably be supplied by the recent infiltration of waters in Wadis and by the direct infiltration of meteoric water through the local sandstone outcrops of the basin. This concerns in particular the well of Salem ben Salem Dabbabi, showing a content of 1.03 TU, and its static level is controlled by the Tataouine Wadi, indicating therefore an evident sign of recent recharge. |
Databáze: | OpenAIRE |
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