RT Journal Article T1 Aspectos hidrogeoquímicos sobre la relación aguas subterráneas-aguas superficiales en el río Andarax (Almería) T1 Hydrogeochemical aspects about the interaction groundwater-surface water in the Andarax river (Almería) A1 Sánchez Martos, Francisco A1 Pulido Bosch, Antonio A1 Vallejos, Ángela A1 Gisbert, Josep A1 Molina, Luis AB The Andarax river is characterized by the variability of its flow, which is dependent upon the rainfall regimeof the area. This work presents a study of the chemical composition of the surface waters of the Andaraxriver over an annual cycle. It analyses the relationship between ground water and surface waters using ahydrogeochemical methodology. The ground water-surface water interactions was found to be more intensein two areas: the north of Almócita and north of Santa Fe. North of Almócita local discharges of goodquality water arise, which leads to the chemical stabilization of the surface water. In this stretch, electricalconductivity, temperature and ion concentrations are constant, and lower than at adjacent samplingpoints. At north of Santa Fe, in the mid-section of the river, a contrasting effect is observed with anincrease in salinity and seasonal variability. Concentrations of Cl- and SO42- become elevated, and there isa marked increase in salinity – especially during low flow periods when the majority of the surface flowderives from groundwater drainage PB Sociedad Geológica de España YR 2004 FD 2004 LK http://hdl.handle.net/10272/8821 UL http://hdl.handle.net/10272/8821 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026