GEOMASS; The Application to characterizations of groundwater flow in the Mizunami Underground Research Laboratory project in Tono area

東濃地域で実施している瑞浪超深地層研究所計画での地下水流動特性評価におけるGEOMASSシステムの適用性

大山 卓也 ; 三枝 博光; 尾上 博則 ; Guimer, J.*; White, M. J.*; Robinson, P.*

Oyama, Takuya; Saegusa, Hiromitsu; Onoe, Hironori; Guimer, J.*; White, M. J.*; Robinson, P.*

For effective characterization of geological environment, it is important to rapidly construct the conceptual model of geological environment based on the field-based investigation data and to identify issues for further investigation. The GEOMASS system has been developed by Japan Atomic Energy Agency in order to evaluate groundwater flow in deep underground. This system provides an integrated simulation system environment for both geological and hydrogeological model development, and groundwater flow simulations. JAEA has been tested the application of the GEOMASS system by applying to characterizations of groundwater flow during the Surface-based Investigation Phase and the Construction Phase in the Mizunami Underground Research Laboratory project in the Cretaceous Toki granite in the Tono area, central Japan. This paper describes the groundwater simulation results and the applicability of GEOMASS system to characterizations of ground water flow.