1887

Abstract

Summary

To test new and cost-effective methods for 3D subsurface characterization in urban and near-surface environments, along with mapping bedrock morphology and zones of weaknesses at a contaminated site, a seismic survey was conducted in the city of Varberg, southern Sweden. The survey consisted of 12 active-source landstreamer seismic profiles, 89 randomly distributed wireless seismic recorders along an area of 350×300 m and 46 wireless recorders deployed along the train tacks crossing the site. In this study, we analyzed the properties and potential of two datasets obtained only from the wireless recorders for seismic imaging. One dataset consists of recordings of shots done along the active-source profiles, while the other one consists of 5 days of passive seismic data recording. The first dataset was used for first-break traveltime tomography with the picked data indicating uniform source-receiver azimuth-offset distribution and minor acquisition footprints. P-wave velocity model obtained from the inversion was successful in imaging bedrock surface and indicated two preferential directions from which contaminants may migrate away from the main contaminated site. Preliminary analysis indicates that the site’s noisy nature limits 3D reflection seismic potential of the dataset with active source recordings while the passive dataset shows promising results for site characterization.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201802502
2018-09-09
2024-03-28
Loading full text...

Full text loading...

References

  1. Brodic, B., Malehmir, A., Juhlin, C., Dynesius, L., Bastani, M. and Palm, H.
    [2015] Multicomponent broadband digital-based seismic landstreamer for near-surface applications. Journal of Applied Geophysics, 123, 227–241.
    [Google Scholar]
  2. Dehghannejad, M., Malehmir, A., Svensson, M., Lindén, M. and Möller, H.
    [2017] High-resolution reflection seismic imaging for the planning of a double-train-track tunnel in the city of Varberg, southwest Sweden. Near Surface Geophysics, v. 15, p. 226–240.
    [Google Scholar]
  3. Malehmir, A., Lindén, M., Friberg, O., Brodic, B., Möller, H., and Svensson, M.
    [2018a] Unravelling contaminant pathways through a detailed seismic investigation, Varberg–southwest Sweden. In 24th European Meeting of Environmental and Engineering Geophysics.
    [Google Scholar]
  4. Malehmir, A., Tryggvason, A., Wijns, C., Koivisto, E., Lindqvist, T., Skyttä, P. and Montonen, M.
    [2018b] Why 3D seismic data are an asset for exploration and mine planning? Velocity tomography of weakness zones in the Kevitsa Ni-Cu-PGE mine, northern Finland. Geophysics, v. 83, no. 2, p. B33–B46.
    [Google Scholar]
  5. Malehmir, A., Zhang, F., Dehghannejad, M., Lundberg, E., Döse, C., Friberg, O., Brodic, B., Place, J., Svensson, M. and Möller, H.
    [2015] Planning of urban underground infrastructure using a broadband seismic landstreamer — Tomography results and uncertainty quantifications from a case study in southwestern Sweden. Geophysics, v. 80, no. 6, p. B177–B192.
    [Google Scholar]
  6. Tryggvason, A., Rögnvaldsson, S. ðurT. and Flóvenz, Ó. G.
    [2002] Three-dimensional imaging of the P- and S-wave velocity structure and earthquake locations beneath Southwest Iceland. Geophysical Journal International, v. 151, no. 3, p. 848–866.
    [Google Scholar]
  7. VarbergKommun
    , 2014, Ansökan om bidrag till avhjälpandeåtgärd, Kv Renen, Varbergs kommun, Open access report.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201802502
Loading
/content/papers/10.3997/2214-4609.201802502
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error