Articles | Volume 8, issue 3
Research article
13 Jun 2017
Research article |  | 13 Jun 2017

Electric resistivity and seismic refraction tomography: a challenging joint underwater survey at Äspö Hard Rock Laboratory

Mathias Ronczka, Kristofer Hellman, Thomas Günther, Roger Wisén, and Torleif Dahlin


Interactive discussion

Status: closed
Status: closed
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Short summary
Pre-investigation for tunnelling below water passages is a challenging task with the main objective of locating fracture zones that lead to low rock quality and thus reduced stability. An inversion approach was tested that combines different geophysical methods to improve the reliability of the results. A fracture zone and previously unknown sedimentary deposits were successfully detected. Synthetic studies pointed out the importance of 3-D effects and model resolution properties.