The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina)
Coastal wetlands are complex hydrogeological systems, in which saline groundwater usually occurs. Salinity can be attributed to many origins, such as dissolution of minerals in the sediments, marine contribution and evapotranspiration, among others. The aim of this paper is to evaluate the processes...
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todo:paper_00489697_v506-507_n_p299_Alvarez2023-10-03T14:52:32Z The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina) Alvarez, M.D.P. Carol, E. Dapeña, C. Chemistry Marsh Patagonia Water Chemical analysis Chemistry Dissolution Evaporation Evapotranspiration Groundwater Hydrochemistry Isotopes Saline water Soil surveys Soils Water Water quality Wetlands Chemical compositions Dissolution of minerals Evaporation process Ground-water qualities Groundwater salinities Gypsum dissolution Marsh Patagonia Groundwater geochemistry bicarbonate calcium carbonate calcium ion calcium sulfate chloride ion deuterium ground water halite mineral oxygen 18 sodium chloride sodium ion sulfate unclassified drug ground water arid environment coastal wetland evapotranspiration groundwater ion marsh oxygen isotope salinity water budget water chemistry Argentina Article chemical composition chemistry coastal waters dissolution evapotranspiration fluid balance geochemistry geomorphology hydrochemistry hydrodynamics hydrogeomorphology hydrology mathematical model precipitation salinity sediment soil texture water flow water quality water table wetland analysis environmental monitoring evapotranspiration statistics and numerical data water supply Argentina Chubut Patagonia Valdes Peninsula Argentina Environmental Monitoring Groundwater Plant Transpiration Water Supply Wetlands Coastal wetlands are complex hydrogeological systems, in which saline groundwater usually occurs. Salinity can be attributed to many origins, such as dissolution of minerals in the sediments, marine contribution and evapotranspiration, among others. The aim of this paper is to evaluate the processes that condition the hydrochemistry of an arid marsh, Playa Fracasso, located in Patagonia, Argentina. A study of the dynamics and geochemistry of the groundwater was carried out in each hydrogeomorphological unit, using major ion and isotope ( 18 O and 2 H) data, soil profiles descriptions and measurements, and recording of water tables in relation to the tidal flow. Water balances and analytical models based on isotope data were used to quantify the evaporation processes and to define the role of evaporation in the chemical composition of water. The results obtained show that the groundwater salinity of the marsh comes mainly from the tidal inflow, to which the halite and gypsum dissolution is added. These mineral facies are the result of the total evaporation of the marine water flooding that occurs mostly at the spring high tides. The isotope relationships in the fan and bajada samples show the occurrence of evaporation processes. Such processes, however, are not mainly responsible for the saline content of groundwater, which is actually generated by the dissolution of the typical evaporite facies of the arid environment sediments. It is concluded that the evapotranspiration processes condition groundwater quality. This is not only due to the saline enrichment caused by the evapotranspiration of shallow water, but also because such processes are the main drivers of the formation of soluble salts, which are then incorporated into the water by groundwater or tidal flow. © 2014 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00489697_v506-507_n_p299_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 |
Chemistry Marsh Patagonia Water Chemical analysis Chemistry Dissolution Evaporation Evapotranspiration Groundwater Hydrochemistry Isotopes Saline water Soil surveys Soils Water Water quality Wetlands Chemical compositions Dissolution of minerals Evaporation process Ground-water qualities Groundwater salinities Gypsum dissolution Marsh Patagonia Groundwater geochemistry bicarbonate calcium carbonate calcium ion calcium sulfate chloride ion deuterium ground water halite mineral oxygen 18 sodium chloride sodium ion sulfate unclassified drug ground water arid environment coastal wetland evapotranspiration groundwater ion marsh oxygen isotope salinity water budget water chemistry Argentina Article chemical composition chemistry coastal waters dissolution evapotranspiration fluid balance geochemistry geomorphology hydrochemistry hydrodynamics hydrogeomorphology hydrology mathematical model precipitation salinity sediment soil texture water flow water quality water table wetland analysis environmental monitoring evapotranspiration statistics and numerical data water supply Argentina Chubut Patagonia Valdes Peninsula Argentina Environmental Monitoring Groundwater Plant Transpiration Water Supply Wetlands |
| spellingShingle |
Chemistry Marsh Patagonia Water Chemical analysis Chemistry Dissolution Evaporation Evapotranspiration Groundwater Hydrochemistry Isotopes Saline water Soil surveys Soils Water Water quality Wetlands Chemical compositions Dissolution of minerals Evaporation process Ground-water qualities Groundwater salinities Gypsum dissolution Marsh Patagonia Groundwater geochemistry bicarbonate calcium carbonate calcium ion calcium sulfate chloride ion deuterium ground water halite mineral oxygen 18 sodium chloride sodium ion sulfate unclassified drug ground water arid environment coastal wetland evapotranspiration groundwater ion marsh oxygen isotope salinity water budget water chemistry Argentina Article chemical composition chemistry coastal waters dissolution evapotranspiration fluid balance geochemistry geomorphology hydrochemistry hydrodynamics hydrogeomorphology hydrology mathematical model precipitation salinity sediment soil texture water flow water quality water table wetland analysis environmental monitoring evapotranspiration statistics and numerical data water supply Argentina Chubut Patagonia Valdes Peninsula Argentina Environmental Monitoring Groundwater Plant Transpiration Water Supply Wetlands Alvarez, M.D.P. Carol, E. Dapeña, C. The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina) |
| topic_facet |
Chemistry Marsh Patagonia Water Chemical analysis Chemistry Dissolution Evaporation Evapotranspiration Groundwater Hydrochemistry Isotopes Saline water Soil surveys Soils Water Water quality Wetlands Chemical compositions Dissolution of minerals Evaporation process Ground-water qualities Groundwater salinities Gypsum dissolution Marsh Patagonia Groundwater geochemistry bicarbonate calcium carbonate calcium ion calcium sulfate chloride ion deuterium ground water halite mineral oxygen 18 sodium chloride sodium ion sulfate unclassified drug ground water arid environment coastal wetland evapotranspiration groundwater ion marsh oxygen isotope salinity water budget water chemistry Argentina Article chemical composition chemistry coastal waters dissolution evapotranspiration fluid balance geochemistry geomorphology hydrochemistry hydrodynamics hydrogeomorphology hydrology mathematical model precipitation salinity sediment soil texture water flow water quality water table wetland analysis environmental monitoring evapotranspiration statistics and numerical data water supply Argentina Chubut Patagonia Valdes Peninsula Argentina Environmental Monitoring Groundwater Plant Transpiration Water Supply Wetlands |
| description |
Coastal wetlands are complex hydrogeological systems, in which saline groundwater usually occurs. Salinity can be attributed to many origins, such as dissolution of minerals in the sediments, marine contribution and evapotranspiration, among others. The aim of this paper is to evaluate the processes that condition the hydrochemistry of an arid marsh, Playa Fracasso, located in Patagonia, Argentina. A study of the dynamics and geochemistry of the groundwater was carried out in each hydrogeomorphological unit, using major ion and isotope ( 18 O and 2 H) data, soil profiles descriptions and measurements, and recording of water tables in relation to the tidal flow. Water balances and analytical models based on isotope data were used to quantify the evaporation processes and to define the role of evaporation in the chemical composition of water. The results obtained show that the groundwater salinity of the marsh comes mainly from the tidal inflow, to which the halite and gypsum dissolution is added. These mineral facies are the result of the total evaporation of the marine water flooding that occurs mostly at the spring high tides. The isotope relationships in the fan and bajada samples show the occurrence of evaporation processes. Such processes, however, are not mainly responsible for the saline content of groundwater, which is actually generated by the dissolution of the typical evaporite facies of the arid environment sediments. It is concluded that the evapotranspiration processes condition groundwater quality. This is not only due to the saline enrichment caused by the evapotranspiration of shallow water, but also because such processes are the main drivers of the formation of soluble salts, which are then incorporated into the water by groundwater or tidal flow. © 2014 Elsevier B.V. |
| format |
JOUR |
| author |
Alvarez, M.D.P. Carol, E. Dapeña, C. |
| author_facet |
Alvarez, M.D.P. Carol, E. Dapeña, C. |
| author_sort |
Alvarez, M.D.P. |
| title |
The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina) |
| title_short |
The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina) |
| title_full |
The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina) |
| title_fullStr |
The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina) |
| title_full_unstemmed |
The role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (Península Valdés, Argentina) |
| title_sort |
role of evapotranspiration in the groundwater hydrochemistry of an arid coastal wetland (península valdés, argentina) |
| url |
http://hdl.handle.net/20.500.12110/paper_00489697_v506-507_n_p299_Alvarez |
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