Aquifer vulnerability and groundwater quality in mega cities: case of the Mexico Basin |
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| Authors: | Jose Alfredo Ramos Leal C Noyola Medrano F O Tapia Silva |
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| Institution: | 1.Instituto Potosino de Investigación Científica y Tecnológica, A.C. (IPICYT),San Luís Potosí, SLP,Mexico;2.Division de Ingenierias, Depto. de Ingeniería Geomática e Hidráulica,Universidad de Guanajuato,Guanajuato, Gto,Mexico;3.Centro de Investigación en Geografía y Geomática “Ing. Jorge L. Tamayo” A.C.,México, D.F.,Mexico |
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| Abstract: | The aquifer system in the Metropolitan Zone of the Mexican Basin is comprised by a higher, middle, and a lower aquifer, separated
by less permeable elements. This study integrated a geographical database from which aquifer vulnerability values were obtained
using the SINTACS method. The results show the lowest vulnerability values in the lacustrine zone of the basin, where most
of the urban area is settled. The medium vulnerability indices are at the edges of the basin and are associated with tuffs,
pyroclasts and alluvial deposits. The highest vulnerability values are in the ranges bordering the basin. High water quality
values are toward the limits of the basin and in the recharge zones while lower quality water is in the Tlahuac and Iztapalapa
zones. The results of this study enable a cause–effect relationship to be established between potential sources of contamination
and groundwater quality indices only for Tlahuac and Iztapalapa, a notable finding since most of the urban area is settled
over low and very low vulnerability zones. |
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