Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos

The work analyses the basin of the Stream El Cura, south of the city of Gualeguaychú, Entre Ríos, where the town's landfill is located. With the objective of evaluating the vulnerability to pollution of the free aquifer, the geology and hydrogeology of the area were studied. Two loessic levels...

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Autores principales: Boujon, P., Sanci, R.
Formato: JOUR
Materias:
Environmental hydrogeology
Hydrochemistry
Landfill
aquifer
bicarbonate
calcium
groundwater pollution
hydrochemistry
hydrogeology
landfill
phreatic zone
piezometer
pollution incidence
vulnerability
water quality
Argentina
Entre Rios
Gualeguaychu
Cura
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v71_n2_p275_Boujon
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v71_n2_p275_Boujon
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spelling todo:paper_00044822_v71_n2_p275_Boujon2023-10-03T13:59:04Z Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos Boujon, P. Sanci, R. Environmental hydrogeology Hydrochemistry Landfill aquifer bicarbonate calcium groundwater pollution hydrochemistry hydrogeology landfill phreatic zone piezometer pollution incidence vulnerability water quality Argentina Entre Rios Gualeguaychu Cura The work analyses the basin of the Stream El Cura, south of the city of Gualeguaychú, Entre Ríos, where the town's landfill is located. With the objective of evaluating the vulnerability to pollution of the free aquifer, the geology and hydrogeology of the area were studied. Two loessic levels of the middle and superior pleistocene age, (Hernandarias and Tezanos Pintos Formations) containing the phreatic aquifer were identified. The effluent character of the stream, with a SW to NE main direction of the underground flow and with regional hydraulic gradients on the order of 0,0016 could be determined from the piezometric analysis. The salinity of the underground water shows an increase in accordance to that direction. A direct relationship was found between the geomorphological units defined for the basin (PL, PA and TPRG) and the chemistry of the groundwater that evolves from bicarbonate calcium in PL to bicarbonate sodium in PA and TPRG. The relationship between the piezometric levels and groundwater hydrochemistry allowed inferring recharge and discharging zones. The three methodologies applied to establish the areas vulnerable to pollution and the degree of vulnerability of the basin were: EKv, GOD and GODS. The most effective method was the GODS, obtaining three degrees of vulnerability basically associated with geomorphological units (high for TPRG; moderate for PA and low for PL), and to the lithologies that compose them. Likewise it was observed that the most vulnerable areas are associated with the lowest piezometric levels. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v71_n2_p275_Boujon
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Environmental hydrogeology
Hydrochemistry
Landfill
aquifer
bicarbonate
calcium
groundwater pollution
hydrochemistry
hydrogeology
landfill
phreatic zone
piezometer
pollution incidence
vulnerability
water quality
Argentina
Entre Rios
Gualeguaychu
Cura
spellingShingle Environmental hydrogeology
Hydrochemistry
Landfill
aquifer
bicarbonate
calcium
groundwater pollution
hydrochemistry
hydrogeology
landfill
phreatic zone
piezometer
pollution incidence
vulnerability
water quality
Argentina
Entre Rios
Gualeguaychu
Cura
Boujon, P.
Sanci, R.
Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos
topic_facet Environmental hydrogeology
Hydrochemistry
Landfill
aquifer
bicarbonate
calcium
groundwater pollution
hydrochemistry
hydrogeology
landfill
phreatic zone
piezometer
pollution incidence
vulnerability
water quality
Argentina
Entre Rios
Gualeguaychu
Cura
description The work analyses the basin of the Stream El Cura, south of the city of Gualeguaychú, Entre Ríos, where the town's landfill is located. With the objective of evaluating the vulnerability to pollution of the free aquifer, the geology and hydrogeology of the area were studied. Two loessic levels of the middle and superior pleistocene age, (Hernandarias and Tezanos Pintos Formations) containing the phreatic aquifer were identified. The effluent character of the stream, with a SW to NE main direction of the underground flow and with regional hydraulic gradients on the order of 0,0016 could be determined from the piezometric analysis. The salinity of the underground water shows an increase in accordance to that direction. A direct relationship was found between the geomorphological units defined for the basin (PL, PA and TPRG) and the chemistry of the groundwater that evolves from bicarbonate calcium in PL to bicarbonate sodium in PA and TPRG. The relationship between the piezometric levels and groundwater hydrochemistry allowed inferring recharge and discharging zones. The three methodologies applied to establish the areas vulnerable to pollution and the degree of vulnerability of the basin were: EKv, GOD and GODS. The most effective method was the GODS, obtaining three degrees of vulnerability basically associated with geomorphological units (high for TPRG; moderate for PA and low for PL), and to the lithologies that compose them. Likewise it was observed that the most vulnerable areas are associated with the lowest piezometric levels.
format JOUR
author Boujon, P.
Sanci, R.
author_facet Boujon, P.
Sanci, R.
author_sort Boujon, P.
title Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos
title_short Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos
title_full Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos
title_fullStr Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos
title_full_unstemmed Vulnerability assessment of the aquifer in the basin of the El Cura stream, Gualeguaychú, Entre Ríos
title_sort vulnerability assessment of the aquifer in the basin of the el cura stream, gualeguaychú, entre ríos
url http://hdl.handle.net/20.500.12110/paper_00044822_v71_n2_p275_Boujon
work_keys_str_mv AT boujonp vulnerabilityassessmentoftheaquiferinthebasinoftheelcurastreamgualeguaychuentrerios
AT sancir vulnerabilityassessmentoftheaquiferinthebasinoftheelcurastreamgualeguaychuentrerios
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