Abstract
In-situ remediation of contaminated groundwater often relies on the installation of a treatment zone degrading the pollution plume. In such projects, adequate delivery of remediation agents in the whole target volume is not trivial. Monitoring the spatial distribution of injected reagents is important for engineers and decision-makers, in order to determine the need of more careful injection in some areas. In this study, we use cross-borehole electrical resistivity tomography (XB-ERT) at two contaminated sites in Denmark to visualize the progressive spreading of two different chemical reagents: an oxidant and a reduction agent made of solid iron particles. Both reagents lead to significant electrical resistivity changes in the subsurface. We observe major differences in the spreading uniformity at the two sites, which we explain by different average permeability and reagent viscosity. We compare tomography results to induction logs in order to evaluate the reliability of the cross-borehole technique.
| Original language | English |
|---|---|
| Title of host publication | 1st Conference on Hydrogeophysics |
| Subtitle of host publication | Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021 |
| Publisher | Wiley-Blackwell |
| Pages | 1-5 |
| ISBN (Electronic) | 9789462823877 |
| DOIs | |
| Publication status | Published - 2021 |
| Externally published | Yes |
| Event | 1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021 - Bordeaux, Virtual, France Duration: 2021 Aug 29 → 2021 Sept 2 |
Publication series
| Name | 1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021 |
|---|
Conference
| Conference | 1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021 |
|---|---|
| Country/Territory | France |
| City | Bordeaux, Virtual |
| Period | 2021/08/29 → 2021/09/02 |
Bibliographical note
Publisher Copyright:© 1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021.
Subject classification (UKÄ)
- Geotechnical Engineering and Engineering Geology