Aguas subterráneas fósiles ligadas a acuíferos costeros
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Abstract
Se han estudiado dos acuíferos, llanura costera de Cabo de Gata y delta del río Andarax, en el litoral almeriense. La edad aparente de sus aguas ha sido determinada, lo que ha permitido diferenciar cua-tro cuerpos de agua en cada uno de estos acuíferos: agua dulce, in-terfase, agua marina y paleoagua de mar. Los cuerpos de agua dulce y marina han sido datados como recientes, registrando el paleoagua de mar valores en torno a 10 ka. La interfase muestra una edad in-termedia. En la llanura de Cabo de Gata, el paleoagua presenta una salinidad superior al agua de mar, mientras en el delta del Andarax la salinidad es idéntica al agua de mar actual. El contraste de densi-dades entre los diferentes cuerpos de agua condiciona la geometría y el grado de avance de estos cuerpos en el acuífero. La evolución paleogeográfica ha jugado un papel importante en la configuración actual de estos acuíferos
Two aquifers have been studied, the coastal plain of Cabo de Gata and the Andarax river delta, on the Almeria coast. The apparent age of its waters has been determined, which has made it possible to differentiate four water bodies in each of these aquifers: freshwater, interface, seawater and paleoseawater. The fresh and marine wa-ter bodies have been dated as recent, registering the paleoseawater values around 10 ka. The interface shows an intermediate age. In the plain of Cabo de Gata, the paleowater has a salinity higher than seawater, while in the Andarax delta the salinity is identical to current seawater. The contrast of densities between the different water bo-dies conditions the geometry and the level of advance of these bodies in the aquifer. Paleogeographic evolution has played an important role in the current configuration of these aquifers
Two aquifers have been studied, the coastal plain of Cabo de Gata and the Andarax river delta, on the Almeria coast. The apparent age of its waters has been determined, which has made it possible to differentiate four water bodies in each of these aquifers: freshwater, interface, seawater and paleoseawater. The fresh and marine wa-ter bodies have been dated as recent, registering the paleoseawater values around 10 ka. The interface shows an intermediate age. In the plain of Cabo de Gata, the paleowater has a salinity higher than seawater, while in the Andarax delta the salinity is identical to current seawater. The contrast of densities between the different water bo-dies conditions the geometry and the level of advance of these bodies in the aquifer. Paleogeographic evolution has played an important role in the current configuration of these aquifers







