Broadband complex dielectric characterization of soils by time domain reflectometry

Yin Jeh Ngui, Chih-Ping Lin*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Recent implementation of environmental geophysical exploration technique in rapid detection and evaluation of soil contamination is widely involved. Typical soil contaminants tend to alter the pore fluid and hence the variation of soil electrical properties, the transmission path of electrical currents or electromagnetic waves may be affected within the contaminated region. This in turn provided the detection basis of the electrical and electromagnetism geophysical methods. As contaminated soils consisted of composite materials of three or four phases, the relationship between their electrical properties and water content, porosity, contaminant concentration are relatively complex. The demand for a wide electrical spectral range has hence arisen for contaminated soil characterization. This study proposed an innovative time domain reflectometry (TDR) approach, in order to measure a broadband complex dielectric spectrum (including both real and imaginary parts of complex dielectric permittivity, CDP) within MHz–GHz frequency range and to perform a more complete electrical characterization of contaminated soil. The robustness, in-situ applicability, and performance of the proposed method is verified using series of laboratorial and in-situ experiments, involving various contaminants. The measurement system can be setup, calibrated, and operated easily, holding great potential for better hydrophysical and environmental characterization of soils.

Original languageEnglish
Title of host publicationProceedings of the 8th International Congress on Environmental Geotechnics Volume 1 - Towards a Sustainable Geoenvironment
EditorsAbdelmalek Bouazza, Liangtong Zhan, Yunmin Chen
PublisherSpringer Berlin Heidelberg
Pages731-738
Number of pages8
ISBN (Print)9789811322204
DOIs
StatePublished - 1 Jan 2019
Event8th International Congress on Environmental Geotechnics, ICEG 2018 - Hangzhou, China
Duration: 28 Oct 20181 Nov 2018

Publication series

NameEnvironmental Science and Engineering
ISSN (Print)1863-5520
ISSN (Electronic)1863-5539

Conference

Conference8th International Congress on Environmental Geotechnics, ICEG 2018
CountryChina
CityHangzhou
Period28/10/181/11/18

Keywords

  • Complex dielectric permittivity
  • Dielectric spectroscopy
  • Electrical property
  • Time domain reflectometry

Fingerprint Dive into the research topics of 'Broadband complex dielectric characterization of soils by time domain reflectometry'. Together they form a unique fingerprint.

Cite this