RT Journal Article T1 Combined use of natural and artificial tracers to determine the hydrogeological functioning of a karst aquifer: the Villanueva del Rosario system (Andalusia, southern Spain) T2 El uso combinado de trazadores naturales y artificiales para determinar el funcionamiento hidrogeológico de un acuífero kárstico: El sistema de Villanueva del Rosario (Andalucía, sur de España) A1 Mudarra-Martínez, Matías A1 Andreo-Navarro, Bartolomé A1 Marín-Guerrero, Ana Isabel A1 Vadillo-Pérez, Iñaki A1 Barberá-Fornell, Juan Antonio K1 Hidrología K1 Geografía física K1 Medio ambiente AB Analysis of natural responses of karst springs provides information on the behavior of the aquifers they drain. Detailed monitoring and qualitative and quantitative analyses of natural responses, and environmental—total organic carbon (TOC), NO3 −, Cl− and intrinsic fluorescence—and artificial (fluorescent dye) tracers, in the water drained by Villanueva del Rosario spring (southern Spain), suggest the existence of a conduit flow system with rapid flows and very short transit times of water through the aquifer. This is in agreement with uranine and eosin breakthrough curves and with simple numerical models done using these data. However, due to the low capacity for natural regulation, not all the recharge effects are simultaneously transmitted to the spring water; given a single input, the system modulates and transfers hydrodynamic variations faster than variations of chemical composition and of water temperature. Additionally, time lags between maximum concentrations of natural and artificial tracers show that the global system response (including diffuse infiltration) is faster and more sensitive than that produced from infiltration concentrated at a single point on the surface (sinkholes). PB Springer Nature BV YR 2014 FD 2014-03-28 LK https://hdl.handle.net/10630/33685 UL https://hdl.handle.net/10630/33685 LA eng NO Mudarra, M., Andreo, B., Marín, A.I. et al. Combined use of natural and artificial tracers to determine the hydrogeological functioning of a karst aquifer: the Villanueva del Rosario system (Andalusia, southern Spain). Hydrogeol J 22, 1027–1039 (2014). https://doi.org/10.1007/s10040-014-1117-1 NO This work is a contribution to the projects CGL2008-06158 and CGL-2012-32590 of DGICYT and IGCP 598 of UNESCO, and to the Research Group RNM-308 of the Junta de Andalucía. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026