Japan Geoscience Union Meeting 2019

Presentation information

Print

[E] Poster

H (Human Geosciences ) » H-DS Disaster geosciences

[H-DS09] Landslides and related phenomena

Tue. May 28, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Masahiro Chigira(Disaster Prevention Research Institute, Kyoto University), Gonghui Wang(Disaster Prevention Research Institute, Kyoto University), Fumitoshi Imaizumi(Faculty of Agriculture, Shizuoka University)

[HDS09-P03] Evaluation of factors of safety and landslide risk for a watershed by Scoops3D

*Zheng-yi Feng1, Chia-Ming Chuang1, Hao-yang Huang1 (1.Department of Soil and Water Conservation, National Chung Hsing University, Taichung, Taiwan)

Keywords:Landslide, Scoops3D, Factor of safety, Risk

In this study, the Scoops3D code (USGS, 2015) is used to analyze the three-dimensional stability of the slopes in a watershed in Taiwan. To perform Scoops3D it requires the inputs such as digital elevation model (DEM), geological materials, groundwater level, earthquake, etc. The code calculates the minimum factor of safety (F.S.) and the associated potential failure volumes by using three-dimensional limit equilibrium method. We performed a comprehensive analysis of slope stability for the research areas using the Scoops3D code. The ArcMap software was used to present the F.S. that are less than unity as a 2D contoured map. We can observe this contoured map to understand the overall slope stability of the studied watershed. We perform a parametrical study by set three different sizes of sliding volume, “large”, “medium” and “small”, for evaluating the risk of landslide for the three different volume sizes.