Characterization of carbonate aquifers (Sierra de Grazalema, S Spain) by means of hydrodynamic and hydrochemical tools

Abstract

Hydrodynamic and hydrochemical monitoring of springs has been largely used to study carbonate aquifers and to determine their hydrogeological functioning. In this work, temporal evolutions regarding flow discharge, major components, and natural soil tracers (Total Organic Carbon and NO3−) of four springs draining karst aquifers located in Sierra de Grazalema Natural Park (Southern Spain) have been analyzed. Results show the existence of aquifers with a high degree of karstification in which recharge water rapidly infiltrates and causes sharp water dilutions and steep flow increases. These aquifers coexist with others characterized by a lower development of karstification processes, but higher natural attenuation capacities.