Phase II investigation in the MIU project, 2; Confirmation of adequacy of groundwater flow conceptual model using groundwater flow simulation

Onoe, Hironori ; Daimaru, Shuji*; Onuki, Kenji; Karino, Tomoyuki; Takeuchi, Ryuji  

The Mizunami Underground Research Laboratory (MIU) is now under construction by the Japan Atomic Energy Agency, in the Cretaceous Toki granite in the Tono area, Central Japan. In Phase II of the MIU Project, hydrogeological investigations and long-term groundwater pressure monitoring are to be carried out in order to confirm adequacy of the groundwater flow conceptual model constructed in Phase I. In this paper, adequacy of the groundwater flow conceptual model is confirmed using groundwater flow simulation based on data from pumping test was carried out from the -300 m Access/Research Gallery.