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2019 Vol.12, Issue 2 Preview Page

Original Article

Evaluation of Slope Stability of Taebaeksan National Park using Detailed Soil Map

정밀토양도를 이용한 태백산국립공원의 사면안정성 평가

Young-Hwan Kim1
,
Byong-Hee Jun2
,
Kye-Won Jun2∗
김 영환1
,
전 병희2
,
전 계원2∗
1Ph.D course, Graduate School of Disaster Prevention, Kangwon National University
2Professor, Graduate School of Disaster Prevention, Kangwon National University
1강원대학교 방재전문대학원 박사과정
2강원대학교 방재전문대학원 교수
∗Corresponding Author
30 June 2019. pp. 65-72
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Abstract

More than 64% of Korea's land is occupied by mountain regions, which have terrain characteristics that make it vulnerable to mountain disasters. The trails of Taebaeksan Mountain National Park—the region considered in this study—are located in the vicinity of steep slopes, and therefore, the region is vulnerable to landslides and debris flow during heavy storms. In this study, a slope stability model, which is a deterministic analysis method, was used to examine the potential occurrence of landslides. According to the soil classification of the detailed soil map, the specific weight of soil, effective cohesion, internal friction angle of soil, effective soil depth, and ground slope were used as the parameters of the model, and slope stability was evaluated based on the DEM of a 1 m grid. The results of the slope stability analysis showed that the more hazardous the area was, the closer the ratio of groundwater/effective soil depth is to 1.0. Further, many of the private houses and commercial facilities in the lower part of the national park were shown to be exposed to danger.

Keywords
Taebacksan national park
Slope stability
Detailed soil map

한국은 국토의 64%이상이 산지로 구성되어 있어 산지재해에 취약한 지형적 특성을 가진다. 연구대상지역인 태백산국립공원 당골유역은 탐방로 대부분이 급경사지와 인접해 있어 집중호우 시 산사태와 토석류에 취약한 지역이다. 본 연구에서는 결정론적 분석방법인 사면안정성 모델을 이용하여 사면재해 발생예측 가능성을 검토하였다. 모델의 매개변수는 정밀토양도의 토양분류에 따라 토질의 단위중량, 유효점착력, 흙의 내부마찰각, 유효토심, 지표경사 등을 이용하였고 1 m격자의 DEM을 바탕으로 사면안정성 평가를 실시하였다. 사면안정성평가 분석결과 지하수/ 유효토심과의 비가 1.0에 가까워질수록 위험지역이 높게 나타났으며, 국립공원 하류지역의 민가와 상업시설 상당수가 위험에 노출된 것으로 나타났다.

키워드
태백산국립공원
사면안정성
정밀토양도
References
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2
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Korean References Translated from the English

1
전병희 (2012). 우면산지역의 사면안정성 평가. 위기관리논문집. 8(5): 227-234.
2
전계원 (2011). Study on risk analysis of debris flow occurrence basin using GIS. 한국안전학회지. 26(2): 83-88.
3
국립방재연구소 (2004). Study on the Sediment Yield Estimation Due to Land Development. 218-226.
4
오경두, 홍일표, 전병호, 안원식, 이미영 (2006). Evaluation of GIS-based Landslide Hazard Mapping. 39(1): 23-33.
10.3741/JKWRA.2006.39.1.023
Information
  • Publisher :Korean Society of Disaster and Security
  • Publisher(Ko) :한국방재안전학회
  • Journal Title :Journal of Korean Society of Disaster and Security
  • Journal Title(Ko) :한국방재안전학회 논문집
  • Volume : 12
  • No :2
  • Pages :65-72
  • Received Date : 2019-05-14
  • Revised Date : 2019-05-31
  • Accepted Date : 2019-06-14
  • DOI :https://doi.org/10.21729/ksds.2019.12.2.65
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