Evaluación de recursos hídricos de las sierras Blanca y Mijas (Málaga)

Abstract

A water balance of Sierras Blanca and Mijas Hydrogeological Unit, the most important aquifer in the Costa del Sol, in the period 1990/91-1993/94, has been made. The recharge is produced by the infiltration of rain water with a total amount of 116.9 hmhm³/year/year: 60.2 hm³/year has been evapotranspirated, 56.7 hm³/year belongs to the useful rain (8 hm³/year as streamflow and 48.7 hm /year as infiltration). The discharge have been measured and gives a total amount of 62.2 hm³/year: 28.2 hm³/year by the springs and 34 hm³/year by the pumpings.
The useful rain has been calculated with several methods (Turc, Coutagne, Kessler, chloride method and monthly and daily Thornwaite method -with field capacities of 25 and 50 mm-). The method that fits in a better way with the known volumes of recharge and discharge, for each one of the aquifer system and for the whole Blanca-Mijas Hydrogeological Unit, is the chloride method.