Measurement on Complex Permittivities of Hydrated Soil, Live and Dead Leaves, Woods, and Stones at Frequency Bands from LF to MF for Landslides Prognostication

• Kumahara Kousei

  National Institute of Technology, Kure College

• Nakajima Kengo

  National Institute of Technology, Kure College

• Kuroki Futoshi

  National Institute of Technology, Kure College

• Eguchi Masanori

  Fuzzy Logic Systems Institute

• Yamakawa Takeshi

  Fuzzy Logic Systems Institute

Abstract

Complex permittivity of hydrated soil included in lands was measured by setting the water volume content to be from 2.5% to 15% for landslides prognostication at frequency bands from low frequency (LF) to medium frequency (MF). The main emphasis is placed on a simple test equipment, which consists of top and bottom electrodes in a plastic cylinder for filling some solutions. From the results, it was obvious that the loss tangent was larger than those of the soil and water themselves due to the ionization. In addition, the complex permittivities of live and dead leaves, woods, and stones existing in the lands were also measured by using the test equipment to estimate the effective permittivity of the forest. The evaluation of the complex permittivities was successfully performed.

Journal

• IEEJ Transactions on Electronics, Information and Systems

  IEEJ Transactions on Electronics, Information and Systems 138 (2), 94-99, 2018

  The Institute of Electrical Engineers of Japan

Keywords

• medium frequency
• low frequency
• measurement
• complex permittivity
• landslides prognostication

Details

• CRID: 1390001204611810944
• NII Article ID: 130006329318
• NII Book ID: AN10065950
• DOI: 10.1541/ieejeiss.138.94
• ISSN: 13488155
• ISSN: 03854221
• NDL BIB ID: 028846599
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028846599
• Web Site: https://www.jstage.jst.go.jp/article/ieejeiss/138/2/138_94/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed