Afección del vertedero de residuos sólidos urbanos de La Mina en el acuífero kárstico de Marbella (Málaga)

Abstract

The affection in groundwater by leachate produced in La Mina landfill has been controlled during a 600 days period by means of hydrochemistry monitoring in springs, wells and piezometers. Hydrochemistry diagrams and statistical tools allow (1) a differentiation between points affected by leachate infiltration, from those others belonging to the non-contaminated groundwater and (2) to separate groups of waters with different grades of affection. The contaminated waters are of chloride-sodium type, but several points presents a mixed bicarbonate-chloride sodium type of water. Evolution of chloride, as a conservative parameter, permits to follow the contamination trend. In the non-affected groundwater, chloride concentration is always below 20 mg/l, with a natural fluctuation due to the dry and wet seasons of the year