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Integrated analysis and interpretation of cross‐hole P‐ and S‐wave tomograms: a case study
Author(s) -
Dietrich Peter,
Tronicke Jens
Publication year - 2009
Publication title -
near surface geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.639
H-Index - 39
eISSN - 1873-0604
pISSN - 1569-4445
DOI - 10.3997/1873-0604.2008041
Subject(s) - geology , seismology , tomography , interpretation (philosophy) , economic geology , wave velocity , hydrogeology , igneous petrology , regional geology , geodesy , engineering geology , mineralogy , geotechnical engineering , petrology , volcanism , tectonics , physics , optics , computer science , shear (geology) , programming language
We present cross‐hole P‐ and S‐wave seismic experiments that have been performed along a ~100 m long transect for the detailed characterization of a contaminated sedimentary site (Bitterfeld research test site, Germany). We invert the corresponding first break arrival times for the P‐ and S‐wave velocity structure and compare two different strategies to interpret these models in terms of pertinent lithological and geotechnical parameter variations. The first (common) approach is based on directly translating the tomographic velocity models into the parameters of interest (e.g., elastic moduli). The second (zonal) approach first reduces the tomographic parameter information to a limited number of characteristic velocity combinations via k ‐means cluster analysis. Then, for each zone (cluster) further parameters including uncertainties can be estimated. In the presented case study, our results indicate that the zonal approach provides an effective means for the integrated interpretation of different co‐located data.