시변성 사면안정해석모형을 이용한 2011년 우면산 산사태 모의

• 영문명: Time-variant Slope Stability Modeling of the 2011 Mount Umyeon Landslide
• 발행기관: 한국방재학회
• 저자명: 이기하(Lee Gi Ha) 트란 더 비트(Tran The Viet) 안현욱(An Hyun Uk)
• 간행물 정보: 『3. 한국방재학회 학술대회논문집』2015년, 262~262쪽, 전체 1쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2015.02.25

영문 초록

It has been widely recognized that accurate landslide susceptibility assessments are essential and effective to prevent disasters and minimize casualties as well as property damages. In recent decades, many slope stability assessment models have been developed and applied, including both steady and transient (time-variant) modeling approaches. None of them, however, solve well the relationship between rainfall and slope instability due to many simplifications in the boundary conditions and the flow in soil. As another slope stability modeling method, a new time-variant slope stability model is introduced in this study, the proposed model is then applied to 2011 Mt. Umyeon landslide event for model verification. The integrated surface and subsurface flow model is used to assess time-varying subsurface water amount governed by hydrological processes. In this flow model, a two-dimensional shallow water equation with diffusion wave approximation and a three-dimensional Richards' equation are used to formulate the surface flow system and the saturated-unsaturated subsurface flow system, respectively. A widely used time-variant slope stability analysis model, TRIGRS, is also applied to the same event for comparison. The proposed model produced significantly improved results as compared with those of TRIGRS in terms of agreement with observation.

키워드

landslide slope stability time-variant model Mt. Umyeon