水上高密度电法在隐伏岩溶区探测中的应用OA

Water exploration has always been a challenging aspect of geophysical exploration,as the presence of water bodies complicates the survey work and constrains the selection of geophysical exploration methods.For a certain project,it was necessary to investigate the karst development in the strata at the bottom of the river within the work area to determine the elevation of the project's anti-seepage line.The author utilized the marine high-density electrical method,employing measures such as erecting a pontoon bridge and increasing the power supply voltage,to complete the field data acquisition work in the underwater concealed karst area with a width of 308 m across the river.Subsequently,the data underwent inversion processing to obtain a resistivity profile map,which was used to delineate the karst development area in conjunction with the on-site geological conditions.The results were successfully verified through drilling,demonstrating that the marine high-density electrical method has good detection effectiveness for underwater karst areas and exhibits strong anti-interference capabilities.