Hydrogeological Investigations in Northwestern Yucatan, Mexico, Using Resistivity Surveys
- Permanent Link:
- Hydrogeological Investigations in Northwestern Yucatan, Mexico, Using Resistivity Surveys
- Series Title:
- Steinich, Birgit
Marin, Luis E.
- Publication Date:
- Subjects / Keywords:
- Hydrogeological Investigations ( local )
Northwestern Yucatan, Mexico ( local )
Resistivity Surveys ( local )
Karst Aquifer ( local )
Ring Of Cenotes ( local )
- serial ( sobekcm )
- Eight Schlumberger soundings and four Wenner anisotropy measurements were conducted in the northwestern section of the Yucatan Peninsula for hydrogeological investigations of a karst aquifer. This system is influenced by a circular high permeability zone (Ring of Cenotes) probably related to the Chicxulub Impact Crater. Schlumberger soundings and Wenner anisotropy measurements show that the karst aquifer can be modeled as an electrically anisotropic medium. Anisotropy is related to preferential permeability directions channeling groundâ€water flow within the aquifer. Directions of maximum permeability were determined using Wenner anisotropy measurements. Electrical soundings were conducted at different sites near the Ring of Cenotes. Resistivity values decrease toward the Ring of Cenotes supporting the hypothesis that selected segments of the Ring have high permeability. Several soundings were conducted in order to study lateral permeability variations along the Ring. A high permeability section can be identified by low resistivity models and is related to a zone of high cenote density. A low permeability section of the Ring was found showing high resistivity models. This zone overlaps with an area of low cenote density. Electrical soundings were used to determine the depth of the freshâ€water lens; the interface was detected along two profiles perpendicular and parallel to the Ring of Cenotes resulting in a depth that ranged from 18 m near the coast up to 110 m in the southeastern part of the study area. The predicted depths of the interface using electrical methods showed a good correlation with Ghybenâ€Herzberg and measured interface depths at some sites. Discrepancies between calculated and interpreted interface depths at two sites may be explained by horizontalâ€toâ€vertical permeability anisotropy.
- Original Version:
- Groundwater, Vol. 34, no. 4 (1996-07).
- Source Institution:
- University of South Florida Library
- Holding Location:
- University of South Florida
- Rights Management:
- This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.
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