Kreis M.B., Taupin Jean-Denis, Patris Nicolas, Lachassagne Patrick, Vergnaud-Ayraud V., Burte J.D.P., Leduc Christian, Passos Rodrigues Martins E. (2024). Multidisciplinary approach to understand the salinization of fractured crystalline aquifers in semi-arid region. Proceedings of IAHS, 385, 393-398. Scientific Assembly of the International Association of Hydrological Sciences, 11., Montpellier (FRA), 2022/05/29-2022/06/03. ISSN 2199-899X.
Titre du document
Multidisciplinary approach to understand the salinization of fractured crystalline aquifers in semi-arid region
Année de publication
2024
Auteurs
Kreis M.B., Taupin Jean-Denis, Patris Nicolas, Lachassagne Patrick, Vergnaud-Ayraud V., Burte J.D.P., Leduc Christian, Passos Rodrigues Martins E.
Source
Proceedings of IAHS, 2024,
385, 393-398 ISSN 2199-899X
Colloque
Scientific Assembly of the International Association of Hydrological Sciences, 11., Montpellier (FRA), 2022/05/29-2022/06/03
In semi-arid areas, groundwater (GW) represents the most reliable resource for water supply. In the semi-arid region of Ceará (Northeastern Brazil), GW of the crystalline fractured aquifers has a salinity higher than expected in this type of environment. This study implemented a multidisciplinary approach based on hydrodynamic (piezometric) and hydrogeochemical (18O, 2H, 3H, 14C, CFC, SF6, Electrical Conductivity, major ions) data to understand the salinization processes. Results demonstrate that GW is generally recent and recharged by meteoric waters mainly through indirect infiltration from evaporated surface water. The study suggests that GW, originally bicarbonated, becomes progressively enriched in chloride due to the dissolution and leaching of salts, during the wet season, which come from meteoric inputs and have precipitated in the unsaturated zone and pond sediments during dryer periods.
Plan de classement
Evaluation et gestion des ressources en eau [062EVAEAU]
;
Géochimie [064GEOCHI]
Localisation
Fonds IRD [F B010095089]
Identifiant IRD
fdi:010095089
