In“ Graphic Representation of Rock Permeability” which'was formerly reported in Japanese by the auther, both variables of porosity and coefficient of permeability were extracted from many references described on geophysical properties of the rocks, and the relationship between these variables were delineated as the graphs after various rocks were divided into four groups of granular sedimentary, carbonate, vesicular volcanic, and crystalline rocks.
This report has two contents related to above graphs.
1) It is explained that above graphs show the trend which rock permeabilities mutually change by the differences of genesis, texture, and original and secondary porosities of the rocks.
2) Each developing country's rocks as an aquifer (Table 1) which they have been described in the participant's reports related to the training affairs of Japan International Cooperation Agency are roughly evaluated in point of view of groundwater productivity based on the knowledge obtained from above graphs.
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