[1D08-13] Model Validation

[1D11] Case study on the development of methodologies for validation of groundwater flow and mass transport models

(3) Effects of the conditioning methods of fractures on groundwater flow characterization

*Tadashi Namikawa¹, Hironori Onoe², Taichi Esaki¹, Masayuki Ishibashi¹, Youichi Tagawa¹, Kazuto Tabei¹, Koji Hane¹, Hiromitsu Saegusa², Keisuke Ishida², Atsushi Sawada³ (1. KAJIMA, 2. NUMO, 3. JAEA)

Keywords:cracked bedrock, groundwater flow, uncertainty, conditioning, connectivity of crack

In this report, we focused on the difference in the data used for the conditioning of the fractures and the difference in the conditioning conditions for the connectivity of the fractures, and conducted multiple patterns of conditioning for the fracture network constructed in the previous report. Furthermore, using the model constructed by conditioning and the model before conditioning, a groundwater flow analysis was performed assuming a steady state when the tunnel was opened, and the amount of water seeping into the tunnel and the water head distribution in the monitoring section were organized. Through the comparison of these results and actual measurements, we discussed the effects of assumptions and concepts in conditioning on the evaluation of groundwater flow.