Scientific description of the areaThe LIC area of the Banyoles lake has a surface area of 1031 ha, and the areas affected by the LIFE project cover approximately 408,7 ha. The waters of this lake area come from the Alta Garrotxa, 50 km to the north, where they seep through the calcareous terrain towards the aquifer. The lake, the small ponds and the emergences configure the lowest point of the extensive hydrogeological system where the waters flow underground towards the north-south and due to a fault ascend and dissolver the chalk and calcareous layers. This dissolution eventually causes the land to collapse (dolines) and gives rise to lakes and emergences. The Banyoles lake is comprised of a set of 6 basins and 13 points of underground water emergence. The most immediate area of the lake boasts different permanent small ponds such as those of the Cendra, Montalt, Can Ordis and Can Cisó or the Nou, which was formed in 1978. Also frequent are temporary lakes such as the beach of Espolla, with a surface area of 3 ha, and the emergences from the plain of Usall.
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