*Maksym Gusyev¹, Naofumi Akata², Tsutomu Yamanaka³, Kimio Hirabayashi⁴, Masashi Toyota⁴, Uwe Morgenstern⁵, Michael Stewart⁵ (1.International Centre for Water Hazard Risk Management, Public Works Research Institute, 2.Hirosaki University, Japan, 3.University of Tsukuba, Japan, 4.Shinshu University, Japan, 5.GNS Science, New Zealand)