Case History - Panama Canal Marine Resistivity with SuperStingR8

2121 Geoscience Drive, Austin, TX 78726Tel: +1 (512) 335-3338Fax: +1 (512) 258-9958Email: sales@agiusa.comWebsite: http://www.agiusa.comMarine Resistivity Survey –Panama CanalSite: The 77-km long Panama Canal with 773 line-km ofresistivity data collected at 25 m transect spacing.Instrument: SuperStingR8 with marine streamer and graphite electrodes(US Patent 6,674,286).Results: Marine resistivity data were successfully used to estimate geotechnical properties along the canal and thus reduce dredging costs for an ongoing Panama Canal expansion program.Date: November and December, 2008Courtesy of:Example Gamboa 3D Resistivity Depth Slice: High resistivity indicates Chagres river gravels (Qa) deposited by the former path of this river (dashed line). These gravels are suitable for the less costly suction dredging method. Note the location of confirmative boreholes that were found to contain these gravels (Qa).Super Sting R8 Marine SystemPage 1 of 2Real Time Survey Control New Atlantic Entrance - Towing streamer2121 Geoscience Drive, Austin, TX 78726Tel: +1 (512) 335-3338Fax: +1 (512) 258-9958Email: sales@agiusa.comWebsite: http://www.agiusa.comMarine Resistivity Survey –Panama Canal (continued…)Courtesy of:Marine Streamer Method: Schematic of marine streamer method and raw data response over a geologic contact.Pacific Entrance – Towing StreamerReferences:ACP, 2007, Environmental Impact Study for the Panama Canal Expansion Project-ThirdSet of Locks. Panama Canal Authority, Project Number CC-07-14. July 2007. http://www.pancanal.com/eng/expansion/Rucker, D.F., G.E. Noonan, and W.J. Greenwood, 2011. Electrical resistivity in support of geologic mapping along the Panama Canal. Engineering Geology 117(1-2):121-133.http://www.hgiworld.com/Page 2 of 2Gaillard Cut – Continental Divide