Multidisciplinary approach to the location and evaluation of karstic hazard zones. Application of geophysicalsurvey and geo-mechanical prospecting in the surroundings of the Zaragoza

摘要

The study of karst hazards from different methodologies is presented. The application of aerialphotography studies, geotechnical approach and geophysical surveys show different results if they areconsidered in an independent way. The comparison between geophysics and aerial photography studiesshows a good correlation whereas the detection of the main hazard zones can be ambiguous when onlythe geotechnical approach is considered. In the studied example, the higher dynamic strength of thematerials occurs in the potentially most hazardous zones, because this parameter is related to the artificialfilling of the subsiding zones. On the other hand, the integrated analysis from the three different points ofview (aerial photographs, geotechnical and geophysical) permits: (i) the planning of the geotechnical surveyin the anomalous zones and (ii) the lateral correlation of the obtained results from the isolated geotechnicaltests