Procedure for estimation of salinity distribution based on resistivity data of rock mass

Mizuno, Takashi   ; Iwatsuki, Teruki  ; Matsuzaki, Tatsuji

This study is aimed to develop the methodology for estimation salinity distribution based on the resistivity logging along sub-surfaced boreholes drilled around Horonobe Underground Research Laboratory in Hokkaido, northern Japan. In addition, the technical knowledge and know-how learnt through this study were picked up for the development of Knowledge Management System. As the result, the procedure to estimate the salinity of groundwater is summarized as follows; (1) Discussion about the advisability of using the data of resistivity logging, (2) Conversion the resistivity data to salinity based on the math formula shown in previous studies, (3) Comparison between chemical analysis result and calculated result. The technical knowledge and know-how are accumulated during this study as follows; Calculated salinity based on deep induction data agrees well with analysis result, it is important that the resistivity between rocks and groundwater should be different in several classes.