Ghiglieri, GiorgioPistis, MarcoAbebe, BekeleAzagegn, TilahunEngidasew, Tesfaye AsresahagnePittalis, DanieleSoler i Gil, AlbertBarbieri, ManuelaNavarro Ciurana, DídacCarrey Labarta, RaúlPuig Caminal, RogerCarletti, AlbertoBalia, RobertoHaile, Tigistu2023-03-122023-03-122020-12-012214-5818https://hdl.handle.net/2445/195081Study region The Lakes Basin is located in the Main Ethiopian Rift. It covers the northern part of the rift valley basin, the Upper Awash River basin, and some sub-basins from the Omo River basin. Due to the presence of high fluoride (F−) content, natural contamination of groundwater has long been recognized as a water-related health issue in the area. Study focus A multidisciplinary research effort, including geological, hydrogeological, hydro-chemical, and geophysical investigations, was adopted to understand the 3D hydrogeological conceptual model and to evaluate F− enrichment in groundwater. New hydrological insights for the region The 3D hydrogeological conceptual model shows a complex hydrogeological environment and a clear hydraulic interconnection between different aquifers. The geological setting has deeply influenced the geometry of the aquifers, recharge and discharge areas, and F− enrichment in groundwater. Two hydrogeological units, namely sedimentary and volcanic multi-aquifers, were identified. The analyses of groundwater circulation, flow paths, and distribution of F- concentrations in each aquifer were conducted. In groundwater, the concentration of fluoride varies from 0.1 to 68.9 mg L−1; in surface water, it ranges from 0.6 to 244.2 mg L−1. Fluoride concentration of 62 % of the water samples analyzed exceeded the 1.5 mg L−1 WHO threshold for fluoride concentration in drinking water. The proposed methodological approach has been demonstrated to be a powerful tool that could be applied in other similar areas.17 p.application/pdfengcc-by (c) Ghiglieri, Giorgio et al., 2020http://creativecommons.org/licenses/by-nc-nd/3.0/es/Hidrologia d'aigües subterràniesLlacsFluorEtiòpiaGroundwater hydrologyLakesFluorsparEthiopiainfo:eu-repo/semantics/article7066652023-03-10info:eu-repo/semantics/openAccess