Seepage Investigation on an Existing Dam Using Very Low Frequency Electromagnetic (VLF-EM) Methods: A Case Study of Shagari Earth Dam, Sokoto, North Western Nigeria
作者: U. Z. MagawataD. S. BondeB. U. AbdullahiBasiru QudusM. N. Yahaya
作者单位: 1Physics Department, Kebbi State University of Science and Technology, Aliero, Nigeria
2Department of Science Laboratory Technology, The Oke-Ogun Polytechnic, Saki, Oyo State, Nigeria
3Department of Physics with Electronics, Federal University Birnin-Kebbi, Birnin Kebbi, Nigeria
刊名: International Journal of Geosciences, 2020, Vol.11 (02), pp.25-36
来源数据库: Scientific Research Publishing Journal
DOI: 10.4236/ijg.2020.112003
原始语种摘要: Very low frequency(VLF-EM) was used to assess variations in overburden composition, bedrocklithology and the hidden Sedimentary structures within the foundation ofShagari Dam of the sedimentary basin of Northwestern Nigeria. FourVLF-electromagnetic (EM) traverses were occupied at 10 m in-tervals. The VLFnormal and filtered real component irregularities identify major geologicalinterfaces suspected to be faults/fractured zones. The points of crossoverbetween the real and imaginary components delineate the fractured zones, whichwere identified as areas of possible seepage (sloughing and piping). The fracturedzones are suspected to be present at all traverses. In total, 38 fracturedzones were identified along the dam embankment and canal site, while 17 majorfractures occurrence dippers along...
全文获取路径: PDF下载  Scientific Research Publishing 

  • VLF Variable Length Field
  • sedimentary 沉积的
  • occurrence 事件
  • overburden 表土
  • basin 盆地
  • component 成分
  • fractured 断裂的
  • identify 视为同一
  • sloughing 脱落
  • irregularities 违法情况