Sobre las surgencias del dominio glaciar relicto de Sierra Nevada (Dilar; Granada)

• Autores: Antonio Castillo Martín
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 1, 2, 2000 (Ejemplar dedicado a: V Congreso Geológico de España (Alicante, 10-14 julio 2000)), págs. 59-62
• Idioma: español
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• Resumen

  • A study was made of the springs in the upper part of the Dflar valley (more than 2.200 m abovesea leve), at the heart of the metapelitics domain of the Sierra Nevada (south of Spain; Granada).The relief of the terrain at this altitude, as well as the alteration and deposit layers, reflect periglacial effects and the vestiges of glacial action. In such circumstances, meltwater normally infiltrates, producing springs of varying types and hydrodynamic behaviour patterns. Four basic genetic types are described. It is important to determine the behaviour of these springs, as they exercise a decisive influence on the natural regime (and, especially, on the recession) of the highest rivers of the Sierra Nevada, (National Park). Discharge and water temperature records reveal that these are impulsive water sources with little memory effect and rapid depletion. We discuss the correlations obtained between discharge-temperature, temperature-altitude and depletion coefficient-altitude. Finally, we stress the benefits to be gained from a longer term follow up of discharge and water temperature records, to provide data for the correct interpretation of the climatic changes foreseen for this fragile alpine region in Andalusia.