GEOMASS system

Oyama, Takuya ; Saegusa, Hiromitsu

As a part of the research and development regarding characterisation of deep geological environment, the GEOMASS (GEOlogical Modelling Analysis And Simulation Software) system has been developed by the Japan Atomic Energy Agency in order to carry out geological and hydrogeological modelling and groundwater flow simulation and so on. The GEOMASS system integrates a commercial geological interpretation system (Earth Vision), which is used for geological modelling and visualisation, with a proprietary code for groundwater flow (FracAffinity). This integrated system allows users to make rapid improvement of models as data increases. Also, it is possible to perform more realistic groundwater flow simulation due to the capability of modelling the rock mass as a continuum with discrete hydro-structural features in the rock. This paper consists of "Overview of GEOMASS system", "FracAffinity Theoretical Background" and "FracAffinity User Guide" and is edited as a GEOMASS system manual. "Overview of GEOMASS system" describes the outline of this system. "FracAffinity Theoretical Background" describes the information of technical background of FracAffinity software. "FracAffinity User Guide" describes the structure of the FracAffinity input files, the usage of FracAffinity Interface and flow-solver.