Fracture zone analysis of borehole data in three crystalline rock sites in Finland: The principal component analysis approach

Juhani Korkealaakso, Tiina Vaittinen, Petteri Pitkänen, Kai Front

    Research output: Book/ReportReport

    Abstract

    In Finland three crystalline rock sites (Romuvaara, Kivetty and Olkiluoto) have been selected for detailed site investigations of Teollisuuden Voima Oy (TVO) for the disposal of the high level waste. The objective of the work has been to study the possibilities of applying the principal component analysis (PCA) of single borehole data to the identification and classification of hydrogeologically important fracture zones. The fracture zone index (FZI) is defined as the first principal component of data from the hydraulic conductivity of 31 m tests, resistivity loggings, radar reflections, open and filled fracture observations and gamma-gamma density/P-wave velocity loggings. FZI anomalies have been compared against earlier conceptualizations based on the overall expert opinion of geological, geophysical and geohydrological information.
    Original languageEnglish
    Place of PublicationHelsinki
    Number of pages80
    Publication statusPublished - 1994
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesYJT Report
    NumberYJT-94-11
    ISSN0359-548X

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  • Cite this

    Korkealaakso, J., Vaittinen, T., Pitkänen, P., & Front, K. (1994). Fracture zone analysis of borehole data in three crystalline rock sites in Finland: The principal component analysis approach. YJT Report, No. YJT-94-11