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f FINDING A DEEP BURIED BEDROCK HIGH USING GEOPHYSICS AND REMOTE SENSING AT A FLOOD CONTROL STRUCTURE (DAM) DURING A SUBSIDENCE HAZARD STUDY IN THE DESERT SOUTHWEST
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 25th Symposium on the Application of Geophpysics to Engineering & Environmental Problems, Mar 2012, cp-329-00110
Abstract
Safety assessment of flood control structures (FRS) or dams located in alluvial basins in the desert southwest commonly includes characterizing the existing or potential future hazard to these structures due to ground pumping-induced subsidence. Differential subsidence can lead to changes in surface hydrology and flood storage capacity, and possible earth fissuring that might cause a piping erosion FRS failure during a flood event. For these studies, the authors typically use deep Wenner array resistivity as a reconnaissance tool to assess compressible basin alluvium and possible relatively shallow (<300 meters depth) bedrock.