Precise Modeling of Hydraulic Structures of Geologic Media for Predicting Long-Term Groundwater Flow

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Two precise spatial modeling methods for rock fracture distributions with incorporation of location and orientation, which control the permeability of geologic media, and for hydraulic conductivity distribution with different scales from rock sample to whole rock body were developed. By integrating these two spatial models, several important characteristics such as a relationship between the high permeable zones and the configuration of rock fractures were clarified. These models were also able to be combined with a numerical simulation of groundwater flow efficiently. As the result, the effect of faults on the groundwater flow and the mechanism of chemical concentration changes with the flow were estimated by the simulation. In addition, prediction of long-term groundwater flow in consideration of the topographic changes by the erosion could be implemented through the tools constructed by this study.