Investigation of shallow leakage zones in a small embankment dam using repeated resistivity measurements in Internal erosion in embankment dams and their foundations

Pontus Sjödahl, Sam Johansson, Torleif Dahlin

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Abstract

Resistivity measurements were carried out in order to identify preferential seepage paths in a small dam in central Sweden. Increased seepage flow had been observed at high reservoir levels. Repeated resistivity measurements were performed along the dam crest during 24 hours controlled rising of the reservoir. Each measurement data set was compared to the original reference data set using time-lapse inversion. Zones with gradually decreasing resistivity were identified inside the dam at the depth corresponding to the changed reservoir level. The zones were interpreted as preferential seepage paths. During a possible future repair of the dam this interpretation may be evaluated.
Original languageEnglish
Title of host publication[Host publication title missing]
EditorsJ-J Fry, T Julinek, J Riha
PublisherInstitute of Water Structures, FCE, BUT, Brno, Czech Republic
Pages165-172
Volume13
ISBN (Print)978-80-7204-736-9
Publication statusPublished - 2011
EventInternal Erosion in Embankment Dams and Their Foundation - Brno, Czech Republic
Duration: 2011 Apr 262011 Apr 29

Publication series

Name
Volume13

Conference

ConferenceInternal Erosion in Embankment Dams and Their Foundation
Country/TerritoryCzech Republic
CityBrno
Period2011/04/262011/04/29

Subject classification (UKÄ)

  • Geotechnical Engineering

Keywords

  • seepage
  • resistivity
  • embankment dam

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