Marga Alconada - Academia.edu (original) (raw)
Papers by Marga Alconada
Fil: Rimski-korsakov, Helena. Universidad de Buenos Aires. Facultad de Agronomia; Argentina
Relaciones entre los tipos de flujos de agua, geomorfología, suelo y planta. Incidencia en la ren... more Relaciones entre los tipos de flujos de agua, geomorfología, suelo y planta. Incidencia en la renovación de nutrientes. Ejemplos de secuencias de suelos en Argentina .....
El suelo se vincula con otros elementos del paisaje natural, vegetacion, geomorfologia y sistemas... more El suelo se vincula con otros elementos del paisaje natural, vegetacion, geomorfologia y sistemas de flujo de agua subterranea, asi como con el hombre, La sostenibilidad de las practicas de manejo y su contribucion al desarrollo de una region depende de que estas sean implementadas conforme al paisaje local y regional. Desde la edafologia se estudia el perfil edafico y los factores formadores que le dieron origen tras una descripcion morfologica y analitica de dicho perfil. Esto en general se realiza hasta un maximo de 1,5-2,0 m de profundidad, y no siempre estos son cabalmente comprendidos al omitir las vinculaciones con otros elementos del paisaje especialmente el agua subterranea. Esto conduce con frecuencia a que no puedan preverse los cambios posibles frente a otros escenarios. El presente libro pretende dar el marco conceptual y aplicado de los criterios que permiten definir la Fertilidad del suelo local en lo regional. Se busca que las caracterizaciones quimicas, fisico-quimi...
En la región del Gran La Plata el cultivo bajo cubierta plástica ocupa más de 3000 ha. En esta re... more En la región del Gran La Plata el cultivo bajo cubierta plástica ocupa más de 3000 ha. En esta región los suelos más comunes son Argiudoles verticos y Hapluderts típicos, caracterizados por un drenaje deficiente debido a la alta proporción de arcilla desde superficie. La característica de los suelos, junto a la calidad del agua de riego, y al manejo intensivo, con excesivo uso de fertilizantes y enmiendas, conducen a la salinización y alcalinización con consecuencias en la sustentabilidad del sistema en términos productivos, ambientales y socio-económicos. Los drenes subsuperficiales, ubicados en el techo del horizonte Bt, son una alternativa válida en la eliminación de sales, no obstante se requiere establecer si no se constituyen en un efecto negativo en la nutrición de los cultivos. Se estudió la evolución de los nutrientes Ca2+, Mg2+ y K+, en un suelo Hapludert típico, durante tres ciclos productivos del cultivo de pimiento (Capsicum annuum L.). Se implementaron los siguientes t...
Agrárias: Pesquisa e Inovação nas Ciências que Alimentam o Mundo V, 2021
O conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons Atribuição-... more O conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons Atribuição-Não-Comercial NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). Direitos para esta edição cedidos à Editora Artemis pelos autores. Permitido o download da obra e o compartilhamento, desde que sejam atribuídos créditos aos autores, e sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. A responsabilidade pelo conteúdo dos artigos e seus dados, em sua forma, correção e confiabilidade é exclusiva dos autores. A Editora Artemis, em seu compromisso de manter e aperfeiçoar a qualidade e confiabilidade dos trabalhos que publica, conduz a avaliação cega pelos pares de todos manuscritos publicados, com base em critérios de neutralidade e imparcialidade acadêmica.
Tecnologia y Ciencias del Agua, 2014
La vinculacion entre elementos del paisaje puede ser explicada mediante la teoria de los sistemas... more La vinculacion entre elementos del paisaje puede ser explicada mediante la teoria de los sistemas de flujo de agua subterranea, que reconoce los diferentes flujos y sus zonas de descarga y recarga, que manifiestan en forma complementaria su funcionamiento hidrologico. Es esencial la caracterizacion de los diferentes flujos para conocer su potencialidad, salinidad y su posibilidad de uso en diferentes practicas de manejo agropecuario y forestal; en esta definicion quedan implicitas sus caracteristicas de cantidad y profundidad de circulacion. En ambientes donde la superficie de agua freatica es poco profunda, definir los flujos constituye un procedimiento esencial al seleccionar las practicas de manejo agropecuario y forestal que coadyuven en una situacion dada, tales como excesos o deficit hidricos. Los flujos se definen a partir de la calidad del agua e indicadores ambientales. Los costos de los analisis quimicos de agua son elevados y resultan dificiles de abordar en grandes areas...
Revista De La Facultad De Agronomia De La Universidad Del Zulia, 2018
En la region del Gran La Plata se produce bajo cubierta plastica mas de 3000 ha, sobre suelos Arg... more En la region del Gran La Plata se produce bajo cubierta plastica mas de 3000 ha, sobre suelos Argiudoles verticos y Hapluderts tipicos, caracterizados por un drenaje deficiente debido a la alta proporcion de arcilla desde superficie. La caracteristica de los suelos, junto a la calidad del agua de riego, y al manejo intensivo, con excesivo uso de fertilizantes y enmiendas, conducen a la salinizacion y alcalinizacion con consecuencias en la sustentabilidad del sistema en terminos productivos, ambientales y socio-economicos. Los drenes subsuperficiales, ubicados en el techo del horizonte Bt, son una alternativa valida en la eliminacion de sales, no obstante se requiere establecer si no se constituyen en un efecto negativo en la nutricion de los cultivos. Se estudio la evolucion de los nutrientes Ca 2+ , Mg 2+ y K + , en un suelo Hapludert tipico, durante tres ciclos productivos del cultivo de pimiento (Capsicum annuum L.) . Se implementaron los siguientes tratamientos: drenes de 2 diam...
Tecnologia y Ciencias del Agua, 2014
Water, 2020
The dynamics of the underground part of the water cycle greatly influence the features and charac... more The dynamics of the underground part of the water cycle greatly influence the features and characteristics of the Earth’s surface. Using Tóth’s theory of groundwater flow systems, surface indicators in Mexico were analyzed to understand the systemic connection between groundwater and the geological framework, relief, soil, water bodies, vegetation, and climate. Recharge and discharge zones of regional groundwater flow systems were identified from evidence on the ground surface. A systematic hydrogeological analysis was made of regional surface indicators, published in official, freely accessible cartographic information at scales of 1:250,000 and 1:1,000,000. From this analysis, six maps of Mexico were generated, titled “Permanent water on the surface”, “Groundwater depth”, “Hydrogeological association of soils”, “Hydrogeological association of vegetation and land use”, “Hydrogeological association of topoforms”, and “Superficial evidence of the presence of groundwater flow systems”...
Investigaciones Geograficas Boletin Del Instituto De Geografia, Apr 1, 2009
The northwest region of the province of Buenos Aires presents cyclical periods of flooding and dr... more The northwest region of the province of Buenos Aires presents cyclical periods of flooding and drought. The last humid cycle started in 1970 with large flooding areas, a rise of the water-table, severe economic losses in the farming sector, environmental deterioration, and social problems. Biodrainage is a technique where vegetation is Sitio Argentino de Producción Animal
Investigaciones Geograficas, Apr 1, 2009
Environmental Earth Sciences, 2011
Environmental Earth Sciences, 2010
Hydrogeochemical behaviour of samples of surface and groundwater collected on a cross-section fro... more Hydrogeochemical behaviour of samples of surface and groundwater collected on a cross-section from Mendoza to the Buenos Aires provinces was studied based on chemical trends, mass balance and water mixing. Hydrogeochemical modelling included major, minor elements as well as stable isotopes (deuterium and 18-O). The area investigated is located in the ''Me´danos Longitudinales'' (longitudinal dunes) of the northwest of Buenos Aires province, Argentina. The study area is subject to alternating flooding and drought. Rainfall and surface water subsequently transferred by rivers, canals and lagoons have been usually considered responsible for local flooding. For this study, origins of excess water were investigated using physical and chemical characteristics of the water involved. The prevalence of groundwater inflow to rainfall events was proposed based on data interpretation. Groundwater influence of flows of local and intermediate nature were defined and the importance of recharge, transit and discharge zones was highlighted. Lagoon floodwater, as well as groundwater from observation wells and production boreholes, show components of intermediate origin. Regional recharge water was identified in Mendoza and San Luis provinces. Their discharge zone was inferred to be located beyond the Buenos Aires province.
Communications in Soil Science and Plant Analysis, 1998
Trace metals, including heavy metals, can be harmful to the biota and human beings. This leads to... more Trace metals, including heavy metals, can be harmful to the biota and human beings. This leads to study the accumulation of those elements in soils. In the Pampean region (Argentina) this knowledge is scarce. Our objectives were to (i) determine the trace metal concentration in soils of Buenos Aires City and agricultural areas, (ii) start to establish the soil trace
Communications in Soil Science and Plant Analysis, 1993
The movement of water from the watertable to the atmosphere is one of the most common causes for ... more The movement of water from the watertable to the atmosphere is one of the most common causes for CaCO3 accumulation on top of the soil. In the Flooding Pampa, the increase in water evaporation due mainly to the reduction of soil cover as a result of grazing has given place to pulses of topsoil salinization. We investigated the influence of this process on lime precipitation in the upper horizon. Data from continuous grazed and ungrazed areas were considered. The relative ion concentrations in the upper horizon of the ungrazed area and in the phreatic water were very similar. Under grazing, absolute ion concentration was larger than in the water table. The anionic constituents did not increase directly and linearly. Chlorides and sulfates showed increments. The carbonate proportion did not change, but bicarbonates showed a relative decrease. This latter reduction could be related to the precipitation of CaCOs in the uppper horizon of the soil. In agreement, the Ion Activity Product (IAP) of the calcite of the soil solution indicated conditions for saturation of CaCO3 in the grazed area. Conversely, the IAP showed CaCO3 undersaturation in the ungrazed area. In spite of the evidence for the ocurrence of lime precipitation, the top horizon did not show measurable lime under grazing. This fact could be explained by considering both the usual time taken by CaCO3 precipitation, and the recent and episodic process of top soil salinization in this region after the introduction of livestock.
Agricultural Water Management, 1993
ABSTRACT A 4-year field trial was carried out on a Typic Natraqualf to modify the surface run-off... more ABSTRACT A 4-year field trial was carried out on a Typic Natraqualf to modify the surface run-off, to change the soil water regime and improve forage productivity. Water was retained by earth banks which were built along contour lines. The area was grazed by cattle at a density of six animal units per hectare during five or six occupation periods per year. To study the effect of cattle trampling, 1 ha within the water retention area was excluded from grazing.It was found that surface accumulation of water led to higher soil water contents and prevented salt ascension by capillarity from the water table (Electrical Conductivity of A1 horizon, 1.4 dS·m−1 against 3.4 dS·m−1 in the control area). Soil salinization in the control area was associated with soil water evaporative losses and the water table depth, when it was less than 1.5 m deep. Soil alkalinity (pH and SAR) showed variations closely related to salinity. The already impaired soil physical properties were not significantly affected by livestock trampling in the water retention area.A dramatic change in plant community composition was observed. Most halophitic species disappeared and the area was covered by hydrophilous grasses. This determined a 4-fold increase in higher quality forage. Run-off water retention proved to be a promising way to change temporarily the status of the soil and to cause a large change in grassland characteristics and productivity.
Proyecto de Extension UNLP 2017. Estacion Experimental "Julio Hirschhorn", Facultad de ... more Proyecto de Extension UNLP 2017. Estacion Experimental "Julio Hirschhorn", Facultad de Ciencias Agrarias y Forestales (UNLP).
Journal of Geography and Regional Planning, 2017
Numerous publications analyze the origin of Arsenic and Fluoride, their behavior and distribution... more Numerous publications analyze the origin of Arsenic and Fluoride, their behavior and distribution in groundwater indicating the importance in understanding the relation between their occurrence with other physical and chemical properties. Here, such properties associated with elements of the landscape in the plain of the Chaco-Pampean region are discussed. The landscape is represented by hills, lagoons and plains used for agricultural purposes. Water was sampled in mills, piezometers and lagoons following sections with different topographic elevation, soil type and vegetation in nine field campaigns from 2011 to 2013. Results in Lincoln are compared to localities in Trenque Lauquen, Pehuajó and Carlos Casares. Hydro geochemical modeling assisted to define composition and origin of the water from local mineralogy in soil and subsoil. Three major water groups were defined HCO 3-Na, HCO 3 >Cl-Na and HCO 3 >Cl>SO 4-Na. Piezometers were located at the top and base of hills with the presence of Acuic Hapludolls-Natric thapto Hapludolls, and Typic Natraqualfs with halophytic vegetation, respectively. Arsenic and Fluoride presence was not fully explained by groundwater chemistry type and association with HCO 3-, Na + , salinity and pH, although generally were linked to alkaline soil and halophyte vegetation. High Arsenic and Fluoride presence in groundwater are explained by discharge flows travelling long distances through a thick sedimentary sequence; relative low concentration is refereed to local travelling flows recharged in nearby high terrain. Groundwater origin and its relations with other elements of the landscape permitted an understanding of groundwater functioning and to anticipate a general situation with respect Arsenic and Fluoride contents. In the present study this criterion is applied to analyze the relation of the occurrence of Arsenic (as total Arsenic, T As) and Fluoride (F-) content in water of the Lincoln region in the Buenos Aires province of Argentina.
Fil: Rimski-korsakov, Helena. Universidad de Buenos Aires. Facultad de Agronomia; Argentina
Relaciones entre los tipos de flujos de agua, geomorfología, suelo y planta. Incidencia en la ren... more Relaciones entre los tipos de flujos de agua, geomorfología, suelo y planta. Incidencia en la renovación de nutrientes. Ejemplos de secuencias de suelos en Argentina .....
El suelo se vincula con otros elementos del paisaje natural, vegetacion, geomorfologia y sistemas... more El suelo se vincula con otros elementos del paisaje natural, vegetacion, geomorfologia y sistemas de flujo de agua subterranea, asi como con el hombre, La sostenibilidad de las practicas de manejo y su contribucion al desarrollo de una region depende de que estas sean implementadas conforme al paisaje local y regional. Desde la edafologia se estudia el perfil edafico y los factores formadores que le dieron origen tras una descripcion morfologica y analitica de dicho perfil. Esto en general se realiza hasta un maximo de 1,5-2,0 m de profundidad, y no siempre estos son cabalmente comprendidos al omitir las vinculaciones con otros elementos del paisaje especialmente el agua subterranea. Esto conduce con frecuencia a que no puedan preverse los cambios posibles frente a otros escenarios. El presente libro pretende dar el marco conceptual y aplicado de los criterios que permiten definir la Fertilidad del suelo local en lo regional. Se busca que las caracterizaciones quimicas, fisico-quimi...
En la región del Gran La Plata el cultivo bajo cubierta plástica ocupa más de 3000 ha. En esta re... more En la región del Gran La Plata el cultivo bajo cubierta plástica ocupa más de 3000 ha. En esta región los suelos más comunes son Argiudoles verticos y Hapluderts típicos, caracterizados por un drenaje deficiente debido a la alta proporción de arcilla desde superficie. La característica de los suelos, junto a la calidad del agua de riego, y al manejo intensivo, con excesivo uso de fertilizantes y enmiendas, conducen a la salinización y alcalinización con consecuencias en la sustentabilidad del sistema en términos productivos, ambientales y socio-económicos. Los drenes subsuperficiales, ubicados en el techo del horizonte Bt, son una alternativa válida en la eliminación de sales, no obstante se requiere establecer si no se constituyen en un efecto negativo en la nutrición de los cultivos. Se estudió la evolución de los nutrientes Ca2+, Mg2+ y K+, en un suelo Hapludert típico, durante tres ciclos productivos del cultivo de pimiento (Capsicum annuum L.). Se implementaron los siguientes t...
Agrárias: Pesquisa e Inovação nas Ciências que Alimentam o Mundo V, 2021
O conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons Atribuição-... more O conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons Atribuição-Não-Comercial NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). Direitos para esta edição cedidos à Editora Artemis pelos autores. Permitido o download da obra e o compartilhamento, desde que sejam atribuídos créditos aos autores, e sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. A responsabilidade pelo conteúdo dos artigos e seus dados, em sua forma, correção e confiabilidade é exclusiva dos autores. A Editora Artemis, em seu compromisso de manter e aperfeiçoar a qualidade e confiabilidade dos trabalhos que publica, conduz a avaliação cega pelos pares de todos manuscritos publicados, com base em critérios de neutralidade e imparcialidade acadêmica.
Tecnologia y Ciencias del Agua, 2014
La vinculacion entre elementos del paisaje puede ser explicada mediante la teoria de los sistemas... more La vinculacion entre elementos del paisaje puede ser explicada mediante la teoria de los sistemas de flujo de agua subterranea, que reconoce los diferentes flujos y sus zonas de descarga y recarga, que manifiestan en forma complementaria su funcionamiento hidrologico. Es esencial la caracterizacion de los diferentes flujos para conocer su potencialidad, salinidad y su posibilidad de uso en diferentes practicas de manejo agropecuario y forestal; en esta definicion quedan implicitas sus caracteristicas de cantidad y profundidad de circulacion. En ambientes donde la superficie de agua freatica es poco profunda, definir los flujos constituye un procedimiento esencial al seleccionar las practicas de manejo agropecuario y forestal que coadyuven en una situacion dada, tales como excesos o deficit hidricos. Los flujos se definen a partir de la calidad del agua e indicadores ambientales. Los costos de los analisis quimicos de agua son elevados y resultan dificiles de abordar en grandes areas...
Revista De La Facultad De Agronomia De La Universidad Del Zulia, 2018
En la region del Gran La Plata se produce bajo cubierta plastica mas de 3000 ha, sobre suelos Arg... more En la region del Gran La Plata se produce bajo cubierta plastica mas de 3000 ha, sobre suelos Argiudoles verticos y Hapluderts tipicos, caracterizados por un drenaje deficiente debido a la alta proporcion de arcilla desde superficie. La caracteristica de los suelos, junto a la calidad del agua de riego, y al manejo intensivo, con excesivo uso de fertilizantes y enmiendas, conducen a la salinizacion y alcalinizacion con consecuencias en la sustentabilidad del sistema en terminos productivos, ambientales y socio-economicos. Los drenes subsuperficiales, ubicados en el techo del horizonte Bt, son una alternativa valida en la eliminacion de sales, no obstante se requiere establecer si no se constituyen en un efecto negativo en la nutricion de los cultivos. Se estudio la evolucion de los nutrientes Ca 2+ , Mg 2+ y K + , en un suelo Hapludert tipico, durante tres ciclos productivos del cultivo de pimiento (Capsicum annuum L.) . Se implementaron los siguientes tratamientos: drenes de 2 diam...
Tecnologia y Ciencias del Agua, 2014
Water, 2020
The dynamics of the underground part of the water cycle greatly influence the features and charac... more The dynamics of the underground part of the water cycle greatly influence the features and characteristics of the Earth’s surface. Using Tóth’s theory of groundwater flow systems, surface indicators in Mexico were analyzed to understand the systemic connection between groundwater and the geological framework, relief, soil, water bodies, vegetation, and climate. Recharge and discharge zones of regional groundwater flow systems were identified from evidence on the ground surface. A systematic hydrogeological analysis was made of regional surface indicators, published in official, freely accessible cartographic information at scales of 1:250,000 and 1:1,000,000. From this analysis, six maps of Mexico were generated, titled “Permanent water on the surface”, “Groundwater depth”, “Hydrogeological association of soils”, “Hydrogeological association of vegetation and land use”, “Hydrogeological association of topoforms”, and “Superficial evidence of the presence of groundwater flow systems”...
Investigaciones Geograficas Boletin Del Instituto De Geografia, Apr 1, 2009
The northwest region of the province of Buenos Aires presents cyclical periods of flooding and dr... more The northwest region of the province of Buenos Aires presents cyclical periods of flooding and drought. The last humid cycle started in 1970 with large flooding areas, a rise of the water-table, severe economic losses in the farming sector, environmental deterioration, and social problems. Biodrainage is a technique where vegetation is Sitio Argentino de Producción Animal
Investigaciones Geograficas, Apr 1, 2009
Environmental Earth Sciences, 2011
Environmental Earth Sciences, 2010
Hydrogeochemical behaviour of samples of surface and groundwater collected on a cross-section fro... more Hydrogeochemical behaviour of samples of surface and groundwater collected on a cross-section from Mendoza to the Buenos Aires provinces was studied based on chemical trends, mass balance and water mixing. Hydrogeochemical modelling included major, minor elements as well as stable isotopes (deuterium and 18-O). The area investigated is located in the ''Me´danos Longitudinales'' (longitudinal dunes) of the northwest of Buenos Aires province, Argentina. The study area is subject to alternating flooding and drought. Rainfall and surface water subsequently transferred by rivers, canals and lagoons have been usually considered responsible for local flooding. For this study, origins of excess water were investigated using physical and chemical characteristics of the water involved. The prevalence of groundwater inflow to rainfall events was proposed based on data interpretation. Groundwater influence of flows of local and intermediate nature were defined and the importance of recharge, transit and discharge zones was highlighted. Lagoon floodwater, as well as groundwater from observation wells and production boreholes, show components of intermediate origin. Regional recharge water was identified in Mendoza and San Luis provinces. Their discharge zone was inferred to be located beyond the Buenos Aires province.
Communications in Soil Science and Plant Analysis, 1998
Trace metals, including heavy metals, can be harmful to the biota and human beings. This leads to... more Trace metals, including heavy metals, can be harmful to the biota and human beings. This leads to study the accumulation of those elements in soils. In the Pampean region (Argentina) this knowledge is scarce. Our objectives were to (i) determine the trace metal concentration in soils of Buenos Aires City and agricultural areas, (ii) start to establish the soil trace
Communications in Soil Science and Plant Analysis, 1993
The movement of water from the watertable to the atmosphere is one of the most common causes for ... more The movement of water from the watertable to the atmosphere is one of the most common causes for CaCO3 accumulation on top of the soil. In the Flooding Pampa, the increase in water evaporation due mainly to the reduction of soil cover as a result of grazing has given place to pulses of topsoil salinization. We investigated the influence of this process on lime precipitation in the upper horizon. Data from continuous grazed and ungrazed areas were considered. The relative ion concentrations in the upper horizon of the ungrazed area and in the phreatic water were very similar. Under grazing, absolute ion concentration was larger than in the water table. The anionic constituents did not increase directly and linearly. Chlorides and sulfates showed increments. The carbonate proportion did not change, but bicarbonates showed a relative decrease. This latter reduction could be related to the precipitation of CaCOs in the uppper horizon of the soil. In agreement, the Ion Activity Product (IAP) of the calcite of the soil solution indicated conditions for saturation of CaCO3 in the grazed area. Conversely, the IAP showed CaCO3 undersaturation in the ungrazed area. In spite of the evidence for the ocurrence of lime precipitation, the top horizon did not show measurable lime under grazing. This fact could be explained by considering both the usual time taken by CaCO3 precipitation, and the recent and episodic process of top soil salinization in this region after the introduction of livestock.
Agricultural Water Management, 1993
ABSTRACT A 4-year field trial was carried out on a Typic Natraqualf to modify the surface run-off... more ABSTRACT A 4-year field trial was carried out on a Typic Natraqualf to modify the surface run-off, to change the soil water regime and improve forage productivity. Water was retained by earth banks which were built along contour lines. The area was grazed by cattle at a density of six animal units per hectare during five or six occupation periods per year. To study the effect of cattle trampling, 1 ha within the water retention area was excluded from grazing.It was found that surface accumulation of water led to higher soil water contents and prevented salt ascension by capillarity from the water table (Electrical Conductivity of A1 horizon, 1.4 dS·m−1 against 3.4 dS·m−1 in the control area). Soil salinization in the control area was associated with soil water evaporative losses and the water table depth, when it was less than 1.5 m deep. Soil alkalinity (pH and SAR) showed variations closely related to salinity. The already impaired soil physical properties were not significantly affected by livestock trampling in the water retention area.A dramatic change in plant community composition was observed. Most halophitic species disappeared and the area was covered by hydrophilous grasses. This determined a 4-fold increase in higher quality forage. Run-off water retention proved to be a promising way to change temporarily the status of the soil and to cause a large change in grassland characteristics and productivity.
Proyecto de Extension UNLP 2017. Estacion Experimental "Julio Hirschhorn", Facultad de ... more Proyecto de Extension UNLP 2017. Estacion Experimental "Julio Hirschhorn", Facultad de Ciencias Agrarias y Forestales (UNLP).
Journal of Geography and Regional Planning, 2017
Numerous publications analyze the origin of Arsenic and Fluoride, their behavior and distribution... more Numerous publications analyze the origin of Arsenic and Fluoride, their behavior and distribution in groundwater indicating the importance in understanding the relation between their occurrence with other physical and chemical properties. Here, such properties associated with elements of the landscape in the plain of the Chaco-Pampean region are discussed. The landscape is represented by hills, lagoons and plains used for agricultural purposes. Water was sampled in mills, piezometers and lagoons following sections with different topographic elevation, soil type and vegetation in nine field campaigns from 2011 to 2013. Results in Lincoln are compared to localities in Trenque Lauquen, Pehuajó and Carlos Casares. Hydro geochemical modeling assisted to define composition and origin of the water from local mineralogy in soil and subsoil. Three major water groups were defined HCO 3-Na, HCO 3 >Cl-Na and HCO 3 >Cl>SO 4-Na. Piezometers were located at the top and base of hills with the presence of Acuic Hapludolls-Natric thapto Hapludolls, and Typic Natraqualfs with halophytic vegetation, respectively. Arsenic and Fluoride presence was not fully explained by groundwater chemistry type and association with HCO 3-, Na + , salinity and pH, although generally were linked to alkaline soil and halophyte vegetation. High Arsenic and Fluoride presence in groundwater are explained by discharge flows travelling long distances through a thick sedimentary sequence; relative low concentration is refereed to local travelling flows recharged in nearby high terrain. Groundwater origin and its relations with other elements of the landscape permitted an understanding of groundwater functioning and to anticipate a general situation with respect Arsenic and Fluoride contents. In the present study this criterion is applied to analyze the relation of the occurrence of Arsenic (as total Arsenic, T As) and Fluoride (F-) content in water of the Lincoln region in the Buenos Aires province of Argentina.