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Two in one leachate plume in a karstic aquifer
Authors:Roger Gonzalez-Herrera  Rodolfo Gomez-Lopez
Institution:1. Facultad de Ingeniería de la UADY, Avenida Industrias no Contaminantes por Periférico Norte, Tablaje Catastral, 12685, Mérida, Yucatán, Mexico
Abstract:Some sites formerly used for waste disposal purposes, even if they are closed, continue generating leachate that seeps into the ground and contaminates groundwater in the area where they are located. It is believed that the rainfall being in contact with waste becomes a source of leachate. This fluid seeps into the aquifer and may identify sources of pollution. A modeling work which determined the migration times of solutes in the karstic aquifer of Merida, Yucatan, Mexico, is presented. Both existing and generated information was analyzed; a leachate plume was identified. The methodology used in the study is described, the application of which allowed concluding that this plume was generated from two sources: a waste disposal site and the oxidation lagoons located next to it. The procedure consisted of performing simulations considering the sources that contribute to the development of the pollution plume and forecasting their behavior. With the developed methodology, similar cases can be analyzed to avoid locating catchment zones of drinking water in inappropriate places and/or develop projects to place waste disposal sites that could affect existing catchment areas and to preserve this resource, essential for life.
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