Thesis

Monitoring of electrical resistivity changes in the ground laboratory model caused by diesel spillage and injetion [sic] of oxygen release compound

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Awarding institution
  • University of Strathclyde
Date of award
  • 2008
Thesis identifier
  • T12176
Qualification Level
Qualification Name
Department, School or Faculty
Abstract
  • The aim of this research is to verify the effectiveness of the electrical resistivity method in the study and monitoring of the pollutant dispersion and migration in the soil. In this particular study, Diesel has been used as the detection pollutant and a laboratory model was created in a tank comprised of a bottom clay layer covered by a sandy layer.Two narrow sectors separated by a permeable screen was included to allow permanent groundwater flow through the soil. In addiction, [sic] a permeable reactive barrier was made in the model with an oxygen release compound (i.e. ORC-Advanced by Regenesis®). When the model was used in the laboratory a mini electrical resistivity array was used to monitor the electrical resistivity properties that the media displayed. In the laboratory model the polltant was spilt on the top of the sandy layer on the left hand side and on the bottom of the sandy layer in the centre. This allowed simulation of very different situations and to study how these differences influence the migration and distribution dynamics of the pollutant. Subsequentily, [sic] the permeable reactive barrier was put in place by injecting an Oxygen Release Compound (i.e. ORC-Adv) in 24 mini boreholes along a cross section in the middle of the model tank. Data concerning Dissolved Oxygen, pH and Conductivity of the water used in the laboratory model were collected with field probes and subjected to laboratory investigation. Apparent electrical resistivity was measured using an electrical resistivity meter and all data were analysed also using statistical analyses. During the study period changes in electrical resistivity caused by pollutant dispersion in the sandy layer, water level fluctuations and presence of the reactive barrier were observed in detail. Data analysis showed that the electrical resistivity investigation method clearly detected the changes in resistivity due to pollutant spillage, influence of water level fluctuation, path of pollutant dispersion and effects of the permeable reactive barrier. The results of this study are summarized using graphs and several electrical resistivity images supported by RES2DINV® software.
Advisor / supervisor
  • Sentenac, Philippe
Resource Type
DOI
Alternative Title
  • Monitoring of electrical resistivity changes in the ground laboratory model caused by diesel spillage and injection of oxygen release compound

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