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2-D and 3-D Resistivity Imaging of Karst Sites in Missouri, USA

2012; Geological Society of America; Volume: 18; Issue: 3 Linguagem: Inglês

10.2113/gseegeosci.18.3.281

1558-9161

Ahmed Ismail, N. Anderson,

Seismic Waves and Analysis

Research Article| August 01, 2012 2-D and 3-D Resistivity Imaging of Karst Sites in Missouri, USA AHMED ISMAIL; AHMED ISMAIL 1 Illinois State Geological Survey, 615 East Peabody Drive, Champaign, IL 61820, and National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt 11421 2Present address of corresponding author: Illinois State Geological Survey, 615 East Peabody Drive, Champaign, IL, 61820 1Corresponding author email: ismail@isgs.uiuc.edu; nannders@mst.edu Search for other works by this author on: GSW Google Scholar NEIL ANDERSON NEIL ANDERSON Department of Geological Science & Engineering, Missouri University of Science and Technology, Rolla, MO 65409 Search for other works by this author on: GSW Google Scholar Environmental & Engineering Geoscience (2012) 18 (3): 281–293. https://doi.org/10.2113/gseegeosci.18.3.281 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation AHMED ISMAIL, NEIL ANDERSON; 2-D and 3-D Resistivity Imaging of Karst Sites in Missouri, USA. Environmental & Engineering Geoscience 2012;; 18 (3): 281–293. doi: https://doi.org/10.2113/gseegeosci.18.3.281 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEnvironmental & Engineering Geoscience Search Advanced Search Abstract Two-dimensional (2-D) electrical resistivity tomography data were acquired across and in proximity to active sinkholes at two highway construction sites in Missouri. Site 1 is located in Greene County in southwestern Missouri; site 2 is located in Jefferson County in east-central Missouri. Eleven 2-D electrical resistivity tomography profiles were acquired along a suite of parallel traverses (spaced at 7.5 m intervals) at site 1 as part of the geotechnical investigation of a proposed interchange. The primary objectives were to identify and map air-filled karstic cavities (if present) and the top of bedrock. The resistivity data from site 1 were processed as both conventional 2-D data and as three-dimensional (3-D) data using two different inversion schemes. The top of bedrock was imaged, and five prominent north-trending, clay-filled, solution-widened fractures were identified. Interpreted air-filled voids were not imaged. At site 2, a pattern of 17 parallel electrical resistivity tomography profiles was acquired across and in proximity to a preexisting sinkhole (approximately 15 m × 10 m × 5 m L/W/D). During construction of the highway, the soil was emptied from the sinkhole overnight following a heavy rainstorm. Electrical resistivity tomography data were acquired to determine if the sinkhole was underlain by a large air-filled cavity. Interpretation of the 2-D and 3-D resistivity images from site 2 showed that the sinkhole was not underlain by a substantive cavity. Rather, the soil in the sinkhole appears to have "flowed" into the subsurface through solution-widened fractures that do not pose a significant risk to the overlying roadway. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.