Hidroquı́mica de humedales costeros asociados a la Reserva Natural Bahı́a San Blas
Keywords:
planicies intermareales, agua subterránea, agua superficialAbstract
Los humedales son bienes que prestan servicios ambientales y los ecosistemas más productivos de la Tierra. La Reserva Natural Bahı́a San Blas, localizada en el sureste de la Provincia de Buenos Aires, es un área protegida de clima semiárido con fuerte evaporación que comprende humedales con ambientes de planicies intermareales asociados a canales de marea, donde la interacción entre el agua subterránea y los flujos intermareales condicionan la hidroquı́mica del humedal. El objetivo del trabajo fue caracterizar quı́micamente el agua superficial y subterránea asociada al humedal. Durante febrero de 2023 se realizó un análisis topográfico junto a relevamientos que comprendió una red de monitoreo de agua superficial y subterránea. En campo se midió el pH y conductividad eléctrica del agua (CE, indicadora de salinidad) con un equipo portátil y se colectaron muestras para analizar iones mayoritarios en el Laboratorio de Geoquı́mica del Centro de Investigaciones Geológicas. Los resultados obtenidos evidencian que el agua es de tipo clorurada sódica. Mientras que la hidroquı́mica del humedal está condicionada por la fuerte evapotranspiración del área, la descarga de agua subterránea desde las geoformas positivas, ası́ como también por la influencia del flujo mareal, lo que conlleva a cambios en la salinidad y el contenido iónico del agua superficial y subterránea. Comprender el funcionamiento de los humedales brinda herramientas para la gestión de estos ecosistemas hidrodinámicamente muy activos.
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Copyright (c) 2025 Julieta Galliari, Carolina Tanjal, Guido Borzi, Lucia Santucci, María del Pilar Álvarez, Eleonora Carol
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