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Geophysics for the Determination of Hydrological Parameters of Karst Systems in Yucatan, Mexico
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics, Sep 2014, Volume 2014, p.1 - 5
Abstract
In the karstic system of Yucatan, airborne geophysics as well as ground geophysics and groundwater levelling, which were performed between 2006 and 2013, led to the generation of a general groundwater model of the area between the town of Tulum and the biosphere reserve of Sian Ka’an. However, for calibration of the model, significant parameters, e.g. the geometry of the cave system, estimates on flow velocity, as well as knowledge on the hydrological properties of the karst matrix are still missing, a necessity to derive reliable modelling results. Therefore, within a small part of the conduit system, the subsurface structure was determined in detail, applying surface geoelectrical measurements of different configurations, hole-to-surface measurements, borehole logging, drilling and tracer tests. Additionally, a low cost method based on laser scanning was developed and tested to derive a 3D model of the cave shape, which was used for calibration purpose. Results coming from different methods are compared and interpreted to derive advanced knowledge about hydrological parameters of the karst system of Yucatan.