Surface hydrological investigation of Horonobe Underground Research Laboratory Project

Tomura, Goji; Kurikami, Hiroshi  ; Shibano, Kazunori; Kunimaru, Takanori; Hara, Minoru

Horonobe Underground Research Center of Japan Atomic Energy Agency has been investigating surface hydrogeological features in and around the Horonobe Underground Research Laboratory (URL) area as a part of Horonobe URL project. In the surface hydrogeological investigation, for the purpose of understanding of groundwater recharge rate and groundwater flow in the shallower part, which are required for the setting of boundary and initial condition of the groundwater flow analysis, meteorological observations, observation of river flux and water quality, soil moisture observation, groundwater level observation, etc are being continued. This report shows present status and results of surface hydrogeological investigation in the Horonobe URL project.