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Integrating GALDIT and GIS for Assessing Sea Water Intrusion Susceptibility in the Akermoud Coastal Water Table, Morocco: Implications for Sustainability
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Author(s): Abdellah Khouz (Cadi Ayyad University, Morocco & Universidade Aberta, Portugal), Jorge Trindade (Universidade Aberta, Portugal), Fatima El Bchari (Cadi Ayyad University, Morocco), Pedro Pinto Santos (University of Lisbon, Portugal), Eusébio Reis (University of Lisbon, Portugal), Adil Moumane (Ibn Tofail University, Morocco), Fatima Ezzahra El Ghazali (Cadi Ayyad University, Morocco), Mourad Jadoud (Chouaïb Doukkali University, Morocco)and Blaid Bougadir (Cadi Ayyad University, Morocco)
Copyright: 2025
Pages: 38
Source title:
Remote Sensing and GIS Techniques in Hydrology
Source Author(s)/Editor(s): Mouhcine Batchi (Ibn Tofail University, Morocco)and Adil Moumane (University of Ibn Tofail, Morocco)
DOI: 10.4018/979-8-3693-9651-3.ch002
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Abstract
The Akermoud coastal aquifer, situated in the northern region of Essaouira, Morocco, is an aquifer that has an important productive capacity, mainly used for irrigation. However, uncontrolled exploitation has increased the risk of sea water intrusion, leading to deteriorating water quality and threatening agricultural sustainability. In this research, in order to access susceptibility to sea water intrusion (SWI), six elements derived from diverse databases are used. Variables were combined in a GALDIT and GIS models, resulting in the analysis of 40 groundwater samples from wells. Results highlight the imminent threat of sea water encroachment into the coastal groundwater system. The resulting GALDIT index map indicates a notably high susceptibility index along a 3 km coastal band, between Tensift Oued and Bhaybeh Beach, enlarging southwards up to 5 km. Saline intrusion patterns are particularly observed between Zaouiet El Kourati and Ouled El Fequih villages, where the merging of saline and fresh waters amplifies salinization, affecting approximately 24% of the study area.
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