Abstract

Maps of intrinsic vulnerability to contamination are necessary tools for water management, however, for Yucatan state, it is relevant to consider its karst nature when generating them. Therefore, through a in deep review on published information of the Chixchulub multi-ring system gravimetry (density and porosity contrast), the derived analysis of Bouguer anomalies, and the maps of total horizontal gradients obtained were compared with various geohydrological, geochemical, geophysical, stratigraphic studies, and 2 structures were recognized: a) Areas located close to high gravimetric values (> 30 mGal/km), associated with falls of the groundwater table, with predominance of brackish water in a reduced thickness, and b) Areas located at low gravimetric values (< 20 mGal/km), associated with elevations of the water table, and large thicknesses of fresh water, keeping the saline interface at depth. Hence, it is of high relevance to adopt the approach here presented to give precise results on intrinsic vulnerability and groundwater movement, adding to the correct management of the hydric resource..

Keywords: vulnerability, gravimetry, hydrogeology, permeability, Chicxulub..