日本地球惑星科学連合2014年大会

講演情報

インターナショナルセッション(ポスター発表)

セッション記号 A (大気海洋・環境科学) » A-GE 地質環境・土壌環境

[A-GE03_30PO1] Subsurface Mass Transport and Environmental Assessment

2014年4月30日(水) 14:00 〜 15:15 3階ポスター会場 (3F)

コンビーナ:*森 也寸志(岡山大学大学院環境生命科学研究科)、斎藤 広隆(東京農工大学大学院農学研究院)、川本 健(埼玉大学大学院理工学研究科)、濱本 昌一郎(東京大学大学院農学生命科学研究科)、張 銘(産業技術総合研究所地圏資源環境研究部門)

14:00 〜 15:15

[AGE03-P13] A Case Study of Combining Geophysics Prospecting Techniques to a Soil Contaminated Site

*WANG Tzu-pin1CHEN Chien-chih1DONG Tien-hsing2CHEN Yi-chieh3LIU Hsin-chang4LIN Chih-ping5HUNG Hao-chun6HO Ching-jen6 (1.Dep. of Earth Sciences and Graduate Institute of Geophysics, National Central University, Taiwan、2.Apollo Technology Co.,Ltd. R.O.C.、3.Geophysical Technology and Engineering Co.,Ltd. R.O.C、4.Disaster Reduction Research Center, Chien Hsin University of Science and Technology, Taiwan、5.D.P.W.E. National Chiao Tung University, Taiwan、6.Environmental Protection Administration, Taiwan)

キーワード:ERT, GPR, EM, pollution

This study utilizes a combination methods of Electrical Reisitivity Tomography (ERT), Ground Penetrating Radar (GPR), and Horizontal Loop Electromagnetic (HLEM) to examine a heavy-metal contaminated site before and after the remediation. It was a processed sludge tacking site of a smelting plant. The sludge is homogeneous red, and the main pollutants are chromium, arsenic and lead. The plant has been closed for more than twenty years. At the time when it was shut down, instead of removing the stacked sludge and underground structures (tank), the site was leveled directly and planted with lawns. Now, it is difficult to know the distribution of the sludge, the depth of its cover, and the correct location of the underground structures.
The pre-remediation investigation conducted with the application of geophysical prospecting techniques found that the HLEM could efficiently define the distribution of sludge efficiently, and ERT could be used to detect the thickness of the sludge and the location of the underground structures, but GPR results failed to meet expectations which may due to a significant attenuation of electromagnetic energy caused by the nature of the sludge. The post-remediation examination shows obvious different morphologies of the site than it was before the remediation. The results can be used to assess the effectiveness of remediation, and to check if any sludge remains.