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| GENERAL DESCRIPTION |
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HYDRIC RESOURCES. WETLANDS (peat bogs, pools, sources)
The south slope of Peña Cebollera, in where the Jarama river has its sources (municipal term of Montejo of de la Sierra), conserves the traces of a glacier shape with small glacier circus. In these zones, peat bogs are developed. They are ponds of greater or smaller magnitude generated in more or less endorreic areas.
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The hydrology of these zones is influenced by the presence of ice and snow during a great part of the year that later stop freezing, being generated drags and the true hydrologic functioning of these wetlands. Although these wetlands are of small magnitude, they constitute elements of great value due to their hydrologic, vegetal and geomorphologic singularity in the Eastern sector of the mountain range of Madrid.
In addition to peat bogs, the artificial water dam has sometimes generated the development of a small wetland whose origin is antropic. This it is the case of the lagoon of the Salmoral in Prádena or the dam of the Portillo stream in La Puebla.
Both in the Lozoya river basin and in the Jarama one, the presence of sources and springs is very frequent, favoured by the stratigraphic disposition, the little permeability of the materials and the importance that the tectonic fracturation system acquires. These sources are more frequent in average slopes. |
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