Variaciones hidrogeoquímicas de periodicidad anual en sugerencias kársticas ejemplo del manantial de La Yedra (Málaga)

Abstract

From 44 chemical analysis of La Yedra spring's waters, collected between 1984 and the beginning of 1988, and after aplications of cluster and factorial analysis, the remarkable seasonal variations are showed; this spring is related to the karstic aquifer of the Sierra de Las Cabras. The chemical variations of the water have a direct relationship with the rainfall fluctuations and the different circulation times of the water in the aquifer. At the low water, the waters have a very high mineralitation and the occurrence of accidentally rainfall don't causes important variations in them. The first rains causes the emergence of the waters with more permanence time in the aquifer, and at the same time they can produce the drag of salts from the surface originated by the summer rain evaporation that don't infiltrate in the aquifer, recording the highest quantity of conductivity. The mineralitation comes down quickly with the start of the major rainship time. When the rain diminishes, the mineralitation begins to increase until it reaches the more frequent values in the hydrological year.