SIMULATION OF MOVEMENT OF POLLUTING PARTICLES IN AREAS OF VULNERABILITY IN THE AQUIFER VALLEYS CENTRALS OF OAXACA

Abstract

This study is an approach combined with the use of two indices and overlap methodologies: Matus for potential recharge zones and DRASTIC for aquifer vulnerability. In addition, an aquifer model of the Central Valleys made with MODFLOW software, together with a particle simulation method with the MODPATH package. It was found that the most vulnerable zones are: the cultivation area located 1.5 km northwest of San Lucas Quiavini, the body of water at 2.5 km northwest of San Miguel Tlanichico, agricultural land between Guadalupe and San Sebastián Etla and the urban area of San Francisco Telixtlahuaca. These areas are not only a danger for the water quality in the site, but can also affect nearby wells or distant communities, so that require special protection.