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3D Effect of Embankment Dam Geometry to Resistivity Data  

Cho, In-Ky (Kangwon National University, Dept. Geophysics)
Lee, Keun-Soo (Kangwon National University, Dept. Geophysics)
Kang, Hye-Jin (Kangwon National University, Dept. Geophysics)
Publication Information
Geophysics and Geophysical Exploration / v.13, no.4, 2010 , pp. 397-406 More about this Journal
Abstract
Resistivity method is a practical and effective geophysical technique to detect leakage zones in embankment dams. Generally, resistivity survey conducted along the crest assumes that the embankment dam has a 2D structure. However, the 3D topography of the embankment distorts significantly resistivity data measured on anywhere of the dam. This study evaluates the influence from 3D effects created by specific dam geometry and effects of water level fluctuations through the 3D finite element modeling technique. Also, a comparison between different locations of survey line are carried out, and topographic correction technique is developed for the resistivity data obtained along the embankment dam. Furthermore, using synthetic resistivity data for an embankment dam model with leakage zone, detectability of leakage zones is estimated through 2.5D inversion.
Keywords
resistivity method; embankment dam; 3D effect; water level; leakage zone;
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Times Cited By KSCI : 2  (Citation Analysis)
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