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Article

Chemical and Isotopic Tracers for Characterization of the Groundwater in the Heterogeneous System: Case from Chichaoua-Imin’tanout (Morocco)

1
GeoSciences Semlalia Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
2
Laboratory of Applied Geology and Geo-Environment, Ibn Zohr University, Agadir 80035, Morocco
3
International Water Research Institute, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco
*
Author to whom correspondence should be addressed.
Academic Editor: Domenico Cicchella
Water 2022, 14(1), 9; https://doi.org/10.3390/w14010009
Received: 31 October 2021 / Revised: 2 December 2021 / Accepted: 9 December 2021 / Published: 21 December 2021
(This article belongs to the Section Hydrogeology)
The geological and hydrogeological approach of the structure of the basin OuladBouSbaâ led to the definition of the geometry of the main aquifers. In general, the profiles show the complexity of the geological configuration. The filling of the depression of OuladBouSbaâ is from the Eo-Cretacian. At this level, the aquifer is recharged by direct water infiltration. The quaternary, Eocene, and Cenomanian-Turonian formations constitute the main aquifers. Horizontal as well as vertical heterogeneity lead to a higher diversification of aquifer characteristics. To define the origins and understand the groundwater flows in this complex zone, we used a multi-tracer approach with the analysis of major elements and the isotopes of δ2H and δ18O. The chemical composition is mainly governed by the interaction with the rock with low electrical conductivity except in areas around domestic landfills. Geochemical results analyzing groundwater in the Piper diagram show two distinct chemical facies: the sulfated calcium and magnesium, and the hyper-chloride calcium. The levels of δ18O range from −7.60 to −4.25 while those of δ2H vary between −53.07 and −27.03. Analyses of signature isotopes differentiate two groups. The first contains high levels of heavy isotopes (highest levels of δ2H and δ18O) having therefore been submitted to evaporation. The second with lower levels of δ2H and δ18O did not undergo evaporation. The first one belongs to the unconfined free aquifer while the second corresponds to the captive aquifer. View Full-Text
Keywords: central Morocco; groundwater; piezometry; geochemistry; isotopes stable central Morocco; groundwater; piezometry; geochemistry; isotopes stable
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MDPI and ACS Style

Tijani, R.; El Mandour, A.; Chafouq, D.; Elmeknassi, M.; El Ghazali, F.E.; Bouchaou, L. Chemical and Isotopic Tracers for Characterization of the Groundwater in the Heterogeneous System: Case from Chichaoua-Imin’tanout (Morocco). Water 2022, 14, 9. https://doi.org/10.3390/w14010009

AMA Style

Tijani R, El Mandour A, Chafouq D, Elmeknassi M, El Ghazali FE, Bouchaou L. Chemical and Isotopic Tracers for Characterization of the Groundwater in the Heterogeneous System: Case from Chichaoua-Imin’tanout (Morocco). Water. 2022; 14(1):9. https://doi.org/10.3390/w14010009

Chicago/Turabian Style

Tijani, Rim, Abdennebi El Mandour, Driss Chafouq, Malak Elmeknassi, Fatima E. El Ghazali, and Lhoussaine Bouchaou. 2022. "Chemical and Isotopic Tracers for Characterization of the Groundwater in the Heterogeneous System: Case from Chichaoua-Imin’tanout (Morocco)" Water 14, no. 1: 9. https://doi.org/10.3390/w14010009

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