Resistivity imaging and image analysis for estimating water and solute transport across the capillary fringe in laboratory experiments
(2011) In Vatten: tidskrift för vattenvård /Journal of Water Management and research 67(3). p.193-198- Abstract
- This study contains a series of laboratory experiments designed to describe the lateral movement and spatial variability of an infiltrated dye tracer across the capillary fringe of homogenous sand in an aquarium. A combination of image analysis and geoelectrical monitoring was used to track the flow paths of the dye with different hydraulic gradients and infiltration rates. Photographs were taken for image analysis to visualize the flow paths. An ABEM Terrameter LS was used to measure the resistivity data during the experiments with a combination of multiple-gradient array and cross-hole-dipole-dipole array. BERT (Boundless Electrical Resistivity Tomography) was applied to obtain three dimensional models of the resistivity distribution.... (More)
- This study contains a series of laboratory experiments designed to describe the lateral movement and spatial variability of an infiltrated dye tracer across the capillary fringe of homogenous sand in an aquarium. A combination of image analysis and geoelectrical monitoring was used to track the flow paths of the dye with different hydraulic gradients and infiltration rates. Photographs were taken for image analysis to visualize the flow paths. An ABEM Terrameter LS was used to measure the resistivity data during the experiments with a combination of multiple-gradient array and cross-hole-dipole-dipole array. BERT (Boundless Electrical Resistivity Tomography) was applied to obtain three dimensional models of the resistivity distribution. The results were compared and evaluated in respect to the image analysis. The inverted models gave a clear impression of the dye tracer distribution and movement within the aquarium. All experiments revealed a strong horizontal movement across the capillary fringe. The flow characteristics of the capillary fringe turned out to be more similar to the characteristics of the saturated zone, than to the characteristics of the unsaturated zone. If the results of this laboratory study can be verified under field conditions, it clearly shows that taking measurements and samples only in the saturated zone at contaminated sites can significantly underestimate the actual extent of the contamination plume. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/ce5778a0-0478-4573-9064-2ca49c35863d
- author
- Pojmark, P ; Rumpf, B ; Dahlin, Torleif LU ; Persson, Magnus LU and Günther, Thomas
- organization
- alternative title
- Resistivitet mätningar och bildanalys för att uppskatta vatten och partikeltransport genom den kapillära zonen i laboratorieexperiment
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- capillary fringe, lateral movement, dye tracer, image analysis, geoelectrical imaging, resistivity, BERT
- in
- Vatten: tidskrift för vattenvård /Journal of Water Management and research
- volume
- 67
- issue
- 3
- pages
- 193 - 198
- publisher
- Föreningen Vatten
- ISSN
- 0042-2886
- language
- English
- LU publication?
- yes
- id
- ce5778a0-0478-4573-9064-2ca49c35863d
- alternative location
- https://www.tidskriftenvatten.se/tsv-artikel/resistivity-imaging-and-image-analysis-for-estimating-water-and-solute-transport-across-the-capillary-fringe-in-laboratory-experiments-resistivitet-matningar-och-bildanalys-for-att-uppskatta-vatten/
- date added to LUP
- 2018-05-30 13:56:34
- date last changed
- 2018-11-21 21:40:05
@article{ce5778a0-0478-4573-9064-2ca49c35863d,
abstract = {{This study contains a series of laboratory experiments designed to describe the lateral movement and spatial variability of an infiltrated dye tracer across the capillary fringe of homogenous sand in an aquarium. A combination of image analysis and geoelectrical monitoring was used to track the flow paths of the dye with different hydraulic gradients and infiltration rates. Photographs were taken for image analysis to visualize the flow paths. An ABEM Terrameter LS was used to measure the resistivity data during the experiments with a combination of multiple-gradient array and cross-hole-dipole-dipole array. BERT (Boundless Electrical Resistivity Tomography) was applied to obtain three dimensional models of the resistivity distribution. The results were compared and evaluated in respect to the image analysis. The inverted models gave a clear impression of the dye tracer distribution and movement within the aquarium. All experiments revealed a strong horizontal movement across the capillary fringe. The flow characteristics of the capillary fringe turned out to be more similar to the characteristics of the saturated zone, than to the characteristics of the unsaturated zone. If the results of this laboratory study can be verified under field conditions, it clearly shows that taking measurements and samples only in the saturated zone at contaminated sites can significantly underestimate the actual extent of the contamination plume.}},
author = {{Pojmark, P and Rumpf, B and Dahlin, Torleif and Persson, Magnus and Günther, Thomas}},
issn = {{0042-2886}},
keywords = {{capillary fringe; lateral movement; dye tracer; image analysis; geoelectrical imaging; resistivity; BERT}},
language = {{eng}},
number = {{3}},
pages = {{193--198}},
publisher = {{Föreningen Vatten}},
series = {{Vatten: tidskrift för vattenvård /Journal of Water Management and research}},
title = {{Resistivity imaging and image analysis for estimating water and solute transport across the capillary fringe in laboratory experiments}},
url = {{https://www.tidskriftenvatten.se/tsv-artikel/resistivity-imaging-and-image-analysis-for-estimating-water-and-solute-transport-across-the-capillary-fringe-in-laboratory-experiments-resistivitet-matningar-och-bildanalys-for-att-uppskatta-vatten/}},
volume = {{67}},
year = {{2011}},
}