[S-TT07_29PO1] Frontier Researches in Exploration Geophysics

★ [STT07-P04] Issues and Countermeasures for the Geophysics Investigation of Contaminated with Chlorinated Hydrocarbon

*Hsin-chang LIU¹, Chih-ping LIN¹, Tzu-pin WANG², Tian-xing DONG³ (1.Disaster Prevention and Water Environment Research Center, National Chiao Tung Univ., 2.Chien Hsin University of Science and Technology, 3.APOLLO TECHNOLOGY CO., LTD.)

Keywords:Geophysical survey, Electrical Resistivity Tomography, Borehole Radar

Environmental geophysics survey has the advantages of survey rapidly, high resolution result and less affected by the surface topography and objects. It is suitable to either a wide range of general survey or a small-scale precise survey. Recently, non-invaded technologies such as geophysical technology have been introduced to provide the plane and space information of pollution in subsurface by integrating few bore-hole dates. The most common used geophysical technologies are ground-penetrating radar method (GPR) and electrical resistivity tomography (ERT). The electrical resistivity tomography (ERT) is one of the most widely used geophysical methods in geological, hydro-geological, and geo-environmental investigations.This study would first discuss how DNAPL and its soluble-phase components invade into the low permeable layer based on the field observation. Then, the importance of geophysical technology is introduced with comparing to the limitations of bore-hole investigation. Last, the case studies on using geophysical technologies including geophysical well logging are introduced to snapshot the complex profile of DNAPL distribution for improving future application.