长江科学院院报2019，Vol.36Issue(10)：146-150,156,6.DOI:10. 11988/ckyyb. 20190885
堤防隐患瞬变电磁三维正演模拟及分析
Three-dimensional Forward Modeling and Analysis of Transient Electromagnetic for Detecting Embankment’s Hidden Danger
摘要
Abstract
Transient electromagnetic method ( TEM) has become an important geophysical survey method as it is ca-pable of detecting in large depth with accurate positioning unaffected by topographic fluctuations. The three-dimen-sional forward method of transient electromagnetic method mainly includes finite element method, finite difference method, and integral equation method. In the present paper, finite element method is applied to the 3D forward modelling of transient electromagnetic for various hidden dangers of embankments. Comparison between the 3D for-ward computation results and the inversion results of field measured data demonstrated that the transient electromag-netic method is sensitive to low resistivity zone, thus having good detection effect for low resistivity anomalous zone of different shapes. Therefore, it is feasible to adopt transient electromagnetic method for the rapid survey of em-bankment’s hidden dangers. The research results in this paper can be used for reference in applying geophysical prospecting technology to the detection of hidden dangers in embankments.关键词
堤防隐患探测/瞬变电磁法/有限单元法/三维正演模拟/低阻体Key words
detecting hidden danger of embankment/transient electromagnetic method/finite element method/3D forward modelling/low resistance zone分类
数理科学引用本文复制引用
周黎明,陈志学,周华敏,付代光..堤防隐患瞬变电磁三维正演模拟及分析[J].长江科学院院报,2019,36(10):146-150,156,6.基金项目
国家重点研发计划项目(2017YFC1502605) （2017YFC1502605）
中央级公益性院所财政基金项目(CKSF2019434/SL) （CKSF2019434/SL）
