日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

セッション記号 H (地球人間圏科学) » H-DS 防災地球科学

[H-DS09] 地すべりおよび関連現象

2019年5月28日(火) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:千木良 雅弘(京都大学防災研究所)、王 功輝(京都大学防災研究所)、今泉 文寿(静岡大学農学部)

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

*Zheng-yi Feng1Chia-Ming Chuang1Hao-yang Huang1 (1.Department of Soil and Water Conservation, National Chung Hsing University, Taichung, Taiwan)

キーワード: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.