Relationships among Lithology, Permeability and Resistivity and their Application to Modelling of Hydrogeology.

For the sake of establishment of a hydrogeological model, the relationships among geological, geophysical and hydraulic properties were discussed, by the use of the data obtained from the rock formation at the Tono area.Performances of hydraulic test equipments recently were also reviewed.Results are summarized as follows:(1) The hydraulic conductivities by PNC Aquifer Test Method (JFT) are quite similar with those by low pressure Lugeon Test Method.(2) Lithology such as grain size and sorting coefficent correlates with hydraulic conductivity.(3) Apparent resistivity, measured by electric logging (100cm normal), correlates closely with hydraulic conductivity.The high correlation between geological and geophygical properties and hydraulic conductivity make possible to estimate hydraulic conductivities by means of Ethology obtained by core logging and electric logging data.The hydrogeological model was successfully constructed by this method.1.