Publication: Hidrogeología del sector Alcalá de Henares-Torrejón de Ardoz (Madrid)
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Publication Date
2014
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Sociedad Geológica de España
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Abstract
El acuífero cuaternario está estructurado en terrazas de unos 3-6 m de espesor saturado. Las terrazas están desconectadas y el agua de la llanura aluvial descarga en el canal del río merced a las condiciones de efluencia detectadas. En la actualidad el uso se limita al regadío y algún apoyo al abastecimiento industrial. Se producen unos cambios de facies en el acuífero mioceno pasando, de NE a SW, de la facies detrítica en Alcalá de Henares, hacia lutitas y margas de la facies de transición (Torrejón), y hacia yesos de la facies central, ya en la desembocadura. El cierre de algunas industrias ha supuesto la recuperación total de los niveles de agua en varias captaciones, siendo algunas surgentes. Se ha detectado el estado de abandono de estas antiguas captaciones por lo que se hace perentorio que se llegue a unas normas viables de sellado de las captaciones en desuso.
The area is characterized by the existence of a water table structured in fluvial terraces of about 3-6 m of saturated thickness. The terraces are disconnected (there are springs in the contacts between terraces) and the groundwater of the alluvial plain discharging into the stream of the river Henares thanks to the detected conditions of efluency.At present the use of aquifer it’s only for irrigation and some support to the industrial areas. Towards the mouth of the river a change of facies in the materials of the tertiary takes place from detrital facies (Alcalá de Henares), towards siltstones and marbles (transition facies), and finally gypsum in the sector of Torrejón. The closing of some factories has supposed the total recovery of the water levels in wells (now artesian-flowing). The state of abandonment of these boreholes made necessary to fixed viable rules in order to the seal the wells.
The area is characterized by the existence of a water table structured in fluvial terraces of about 3-6 m of saturated thickness. The terraces are disconnected (there are springs in the contacts between terraces) and the groundwater of the alluvial plain discharging into the stream of the river Henares thanks to the detected conditions of efluency.At present the use of aquifer it’s only for irrigation and some support to the industrial areas. Towards the mouth of the river a change of facies in the materials of the tertiary takes place from detrital facies (Alcalá de Henares), towards siltstones and marbles (transition facies), and finally gypsum in the sector of Torrejón. The closing of some factories has supposed the total recovery of the water levels in wells (now artesian-flowing). The state of abandonment of these boreholes made necessary to fixed viable rules in order to the seal the wells.