*WENCHI LAI¹、ShihJung Wang²、KuoChin Hsu³、Naoji Koizumi⁴ (1.Disaster Prevention Research Center, National Chengkung University, Taiwan、2.Geotechnical Engineering Research Center Sinotech Engineering Consultants, INC., Taiwan、3.Department of Resources Engineering, National Chengkung University, Taiwan、4.Department of Ecosystem Studies, School of Environmental Science, The University of Shiga Prefecture)