Study on geological environment model using geostatistics method (Joint research)

Honda, Makoto*; Suzuki, Makoto*; Sakurai, Hideyuki*; Iwasa, Kengo*; Matsui, Hiroya 

The purpose of this study is to develop the geostatistical procedure for modeling geological environments and to evaluate the quantitative relationship between the amount of information and the reliability of the model using the data sets obtained in Phase 1 of the Horonobe Underground Research Laboratory Project. In FY 2006 research, the data obtained from the deep boreholes which were executed in FY 2005 were newly used in addition to the data sets used in the previous study. And the hydrogeological models were built by using the same geostatistical procedure developed in the previous study. The relationship between the amount of information and the reliability of the model was demonstrated as well through a comparison of the models at each step which corresponds to the investigation stage in each FY. Furthermore, in the case of hydro-chemical model, the modeling procedure was applied to each dissolved principal component and their characteristics of distribution were clarified.