Determinación de la vulnerabilidad del acuífero del Valle de Etla, Oaxaca, México

Abstract

We assessed the vulnerability to the contamination of the central portion from the valley of Etla aquifer, Oaxaca, Mexico based in the SINTACS method. Direct cur- rent vertical electrical and EM-34 electromagnetic induction soundings enabled to establish the geometry as well as the litology from the aquifer. 

In particular, these geophysical studies enabled to obtain key hydrological pa- rameter (thicknesses of the unsatured zone as well as from the aquifer, and the hy- draulic conductivity) in zones without wells. 

The vulnerability to contamination was assessed considering a normal impact scenario. Accordingly, we obtain medium to high vulnerability indices, implying that this aquifer is very vulnerable to contamination. Based in this study, alterna- tives for the protection and management from this aquifer can be formulated.