Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
The origin of the high salinity in the groundwater of a coastal wetland in an arid climate was studied in the Playa Fracasso marsh, located on the northwest coast of the extra-Andean Patagonia. Research was carried out by means of the design of a network of soil pits and short piezometers in the mar...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18666280_v73_n12_p7983_Alvarez http://hdl.handle.net/20.500.12110/paper_18666280_v73_n12_p7983_Alvarez |
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paper:paper_18666280_v73_n12_p7983_Alvarez2023-06-08T16:29:43Z Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina Arid climate Geohydrology Hydrochemistry Patagonia Salt marsh Chlorine Groundwater Groundwater geochemistry Hydrochemistry Hydrogeology Isotopes Magnesium Soils Tides Arid climates Electrical conductivity Groundwater salinizations Isotopic composition Patagonia Physical and chemical properties Salinization process Salt marshes Wetlands arid environment climate conditions coastal wetland electrical conductivity groundwater hydrodynamics inorganic compound isotopic composition metal numerical model physicochemical property piezometer saline soil salinization saltmarsh soil water water table Andes Argentina Patagonia The origin of the high salinity in the groundwater of a coastal wetland in an arid climate was studied in the Playa Fracasso marsh, located on the northwest coast of the extra-Andean Patagonia. Research was carried out by means of the design of a network of soil pits and short piezometers in the marsh and the surrounding landforms. Continuous fluctuations of the water table, in situ physical and chemical properties, major ions (Ca 2+ , Mg 2+ , Na + , K + , Cl − , SO 4 2− , HCO 3 − ) and stable isotopes ( 18 O and 2 H) in groundwater, as well as soil salinity, were measured. The combined analysis of the hydrodynamics, the ion ratios rCa 2+ /rCl − and rMg 2+ /rCa 2+ vs. rCl − and the isotopic composition made it possible to recognize an area within the high marsh in which the origin of groundwater is mainly marine and another in which the contributions are of mixed origin. By means of the analysis of rCl − vs. δ 18 O, a salinization process with no change in isotopic composition was identified. Its interpretation, together with those of the soil salinity profiles and the records of the fluctuations in electrical conductivity associated with extraordinary tides, was used to define a conceptual model of salinization which could be useful to understand other coastal wetlands under similar arid climatic conditions. It consists in a cyclical mechanism of evapotranspiration, precipitation, dissolution and transport of salts during tides. © 2014, Springer-Verlag Berlin Heidelberg. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18666280_v73_n12_p7983_Alvarez http://hdl.handle.net/20.500.12110/paper_18666280_v73_n12_p7983_Alvarez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Arid climate Geohydrology Hydrochemistry Patagonia Salt marsh Chlorine Groundwater Groundwater geochemistry Hydrochemistry Hydrogeology Isotopes Magnesium Soils Tides Arid climates Electrical conductivity Groundwater salinizations Isotopic composition Patagonia Physical and chemical properties Salinization process Salt marshes Wetlands arid environment climate conditions coastal wetland electrical conductivity groundwater hydrodynamics inorganic compound isotopic composition metal numerical model physicochemical property piezometer saline soil salinization saltmarsh soil water water table Andes Argentina Patagonia |
| spellingShingle |
Arid climate Geohydrology Hydrochemistry Patagonia Salt marsh Chlorine Groundwater Groundwater geochemistry Hydrochemistry Hydrogeology Isotopes Magnesium Soils Tides Arid climates Electrical conductivity Groundwater salinizations Isotopic composition Patagonia Physical and chemical properties Salinization process Salt marshes Wetlands arid environment climate conditions coastal wetland electrical conductivity groundwater hydrodynamics inorganic compound isotopic composition metal numerical model physicochemical property piezometer saline soil salinization saltmarsh soil water water table Andes Argentina Patagonia Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina |
| topic_facet |
Arid climate Geohydrology Hydrochemistry Patagonia Salt marsh Chlorine Groundwater Groundwater geochemistry Hydrochemistry Hydrogeology Isotopes Magnesium Soils Tides Arid climates Electrical conductivity Groundwater salinizations Isotopic composition Patagonia Physical and chemical properties Salinization process Salt marshes Wetlands arid environment climate conditions coastal wetland electrical conductivity groundwater hydrodynamics inorganic compound isotopic composition metal numerical model physicochemical property piezometer saline soil salinization saltmarsh soil water water table Andes Argentina Patagonia |
| description |
The origin of the high salinity in the groundwater of a coastal wetland in an arid climate was studied in the Playa Fracasso marsh, located on the northwest coast of the extra-Andean Patagonia. Research was carried out by means of the design of a network of soil pits and short piezometers in the marsh and the surrounding landforms. Continuous fluctuations of the water table, in situ physical and chemical properties, major ions (Ca 2+ , Mg 2+ , Na + , K + , Cl − , SO 4 2− , HCO 3 − ) and stable isotopes ( 18 O and 2 H) in groundwater, as well as soil salinity, were measured. The combined analysis of the hydrodynamics, the ion ratios rCa 2+ /rCl − and rMg 2+ /rCa 2+ vs. rCl − and the isotopic composition made it possible to recognize an area within the high marsh in which the origin of groundwater is mainly marine and another in which the contributions are of mixed origin. By means of the analysis of rCl − vs. δ 18 O, a salinization process with no change in isotopic composition was identified. Its interpretation, together with those of the soil salinity profiles and the records of the fluctuations in electrical conductivity associated with extraordinary tides, was used to define a conceptual model of salinization which could be useful to understand other coastal wetlands under similar arid climatic conditions. It consists in a cyclical mechanism of evapotranspiration, precipitation, dissolution and transport of salts during tides. © 2014, Springer-Verlag Berlin Heidelberg. |
| title |
Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina |
| title_short |
Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina |
| title_full |
Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina |
| title_fullStr |
Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina |
| title_full_unstemmed |
Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina |
| title_sort |
groundwater salinization in arid coastal wetlands: a study case from playa fracasso, patagonia, argentina |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18666280_v73_n12_p7983_Alvarez http://hdl.handle.net/20.500.12110/paper_18666280_v73_n12_p7983_Alvarez |
| _version_ |
1768545347058008064 |