Contenido en cloruros de las precipitaciones al sur de Sierra Nevada (Granada). Aplicación a la evaluación de recursos hídricos

Abstract

The chloride contents o f p recip itation in some stations located to the south o f Sierra Nevada (Granada, Spain) have been monitored. The average values obtained in each station range between 2 and 17 mg/I, controlled m ainly by the distance to the sea. A num ber o f sm all triassic carbonate outcrops in this area have been selected to evaluate the aquifers recharge using the Cl~ throughput method. The infiltration values so obtained, from 13 to 65%, show a well-marked altitudinal control due to the decrease of the evapotranspiration rate with the increasing height of intake sectors. These results have been compared whith those obtained by the application of the Ture, Coutagne and Thornthwaite methods. The latter has also been applied both on a monthly (the usual procedure) and a dayly basis, which seems to be more representative of the semiarid climatic conditions that prevail in the lowaltitude sectors of the studied area