All Issue

2020 Vol.13, Issue 3 Preview Page

Original Article

Simulation of the Debris Flow Using FLO-2D According to Curve-shape Changes in Bed Slopes

FLO-2D를 활용한 경사지 형상에 따른 토석류 흐름양상에 대한 수치모의

Hyo Jun Jung1
,
Hyung Ju Yoo2
,
Seung Oh Lee3*
정 효준1
,
유 형주2
,
이 승오3*
1Master Course, Dept. of Civil Engineering, Hongik Univ.
2Ph.D. Candidate, Dept. of Civil Engineering, Hongik Univ.
3Professor, Dept. of Civil Engineering, Hongik Univ.
1홍익대학교 토목공학과 석사과정
2홍익대학교 토목공학과 박사과정
3홍익대학교 토목공학과 교수
*Corresponding Author
30 September 2020. pp. 45-58
PDF XML Citation
Abstract

Due to a high portion of mountainous terrains in Korea, debris flow and its disasters have been increased. In addition, recently localized flash-floods caused by climate change should add frequencies and potential risks. Grasping and understanding the behaviors of debris flow would allow us to prevent the consequent disasters caused by its occurrence. In this study, we developed a number of cases by changing the bottom slopes and their curvatures and investigated their effects on potential damage caused by the debris flow using FLO-2D. As simulating each bed slopes we analyzed for velocity, depth, impact, reach distance, and reach shape. As a result the lower the average slope, the greater the influence of its curvature and the numerical results were analyzed with showed a well-marked difference in impact stress and flow velocity. The result from this study could be referred for protecting from the debris flows when design countermeasure structures in mountainous regions.

Keywords
Debris flows
Shape of slope
FLO-2D
Risk management

국내 지형특성은 산지의 비율이 높아 토석류로 인한 피해 위험이 높다. 또한 기후변동성으로 인한 게릴라 국지성 호우는 토석류 재해의 발생빈도와 잠재적 위협을 증가시킨다. 토석류는 발생에 대한 예측이 어려워 거동특성을 분석하여 사전에 피해를 예방하는 것이 효과적이다. 본 연구는 공차와 평균경사가 각각 다른 경사지 형상을 FLO-2D를 사용하여 전파면과 경사면에 대해 발생하는 피해규모를 연구하였다. 수치모의를 통해 계산된 유속, 수심, 충격응력, 도달거리, 전파형상을 분석하였다. 수치모의 결과, 평균경사가 낮을수록 경사형상이 토석류 거동에 미치는 영향이 크며, 층격응력, 유속에서 분명한 차이를 나타낸다. 본 연구결과는 산지 주변 구조물 설계 및 시공 시 토석류 발생 피해 및 대비에 대해 참고할 자료가 될 것을 기대한다.

키워드
토석류
경사지 형상
FLO-2D
위험도 평가
References
1
Cruise, J. F. Singh, V. P., and Sherif, M. M. (2014). Elementary Hydraulics 1st. Cengage Learning US.
2
Iverson, R. M. (2003). The Debris-flow Rheology Myth. Debris-flow Hazards Mitigation, Mechanics, Prediction, and Assessment. 1: 303-314.
3
Iverson, R. M. and Denlinger, R. P. (2001). Flow of Variably Fluidized Granular Masses Across Three-Dimensional Terrain: 1. Coulomb Mixture Theory. Journal of Geophysical Research: Solid Earth. 106(B1): 537-552.
10.1029/2000JB900329
4
Jakob, M., Hungr, O., and Jakob, D. M. (2005). Debris-flow Hazards and Related Phenomena (Vol. 739). Berlin: Springer.
5
Jang, C. B., Choi, Y. N., and Yoo, N. J. (2017). A Study on Behavior Characteristics and Triggering Rainfall of Debris Flow. Journal of the Korean Geo-Environmental Society. 18(1): 13-21.
10.14481/jkges.2017.18.1.13
6
Jeong, S. W. (2010). Flow Characteristics of Landslides/debris Flows: Sediment Rheology and Mobility and Mobility of Landslides. Proceedings of Korean Society of Engineering Geology (KSEG) Conference 2010. KSEG, 79-80.
7
Kim, S., Paik, J., and Kim, K. S. (2013) Run-out modeling of debris flows in Mt. Umyeon using FLO-2D,  Journal of the Korean Society of Civil Engineers, 33(3): 965-974.
10.12652/Ksce.2013.33.3.965
8
Kim, S. D., Lee, H. J., and Chang, H. J. (2019). The Study for Analysis of Impact Force of Debris Flow According to the Location of Check Dam. Journal of the Korea Academia-industrial Cooperation Society. 20(1): 409-418.
9
Kim, S.-K. and Seo, H.-S. (1997). An Analysis of Debris Flow Movement Using Rheological Model. Journal of Korean Geotechnical Society. 13(5): 133-143.
10
Kim, Y. H., Jun, B. H., and Jun, K. W. (2019). Evaluation of Slope Stability of Taebaeksan National Park Using Detailed Soil Map. Journal of Korean Society of Disaster and Security. 12(2): 65-72.
11
Korea Express Corporation (2017). Risk Assessment and Prevention of Debris Flow on Expressway. Seongnam: Korea Express Corporation.
12
Korea Forest Service (2007). How Many Mountains in Korea?, Korean Mountain Statistics Representation. Daejeon: Korea Forest Service.
13
Korea Forest Service (2015). Risk Assessment of Vulnerable Areas in Debris Flow. Daejeon: Korea Forest Service.
14
Lee, D. H., Lee, S. R., Jeon, J. S., Park, J. Y., and Kim, Y. T. (2019). Estimation of Debris-flow Volumes by an Artificial Neural Network Model. 7th International Conference on Debris-Flow Hazards Mtigation.
15
Lee, J. S., Song, C. G., Kim, H. T., and Lee, S.O. (2015). Effect of Land Slope on Propagation due to Debris Flow Behavior. Korean Society of Safety. 30(3): 52-58.
10.14346/JKOSOS.2015.30.3.52
16
Lee, M. J. and Kim, Y. T. (2013). Movement and Deposition Characteristics of Debris Flow According to Rheological Factors. Journal of the Korean Geotechnical Society. 29(5): 19-27.
10.7843/kgs.2013.29.5.19
17
Ministry of the Interior and Safety (2018). Evaluation Standard of Danger for Debris Flow. Sejong: Ministry of the Interior and Safety.
18
O'Brien, J. S. and Garcia, R. (2009). FLO-2D Reference Manual. Nutrioso, Arizona. Version, 2011.
19
O'Brien, J. S. and Julien, P. Y. (1985). Physical Properties and Mechanics of Hyperconcentrated Sediment Flows. Proc. ASCE HD Delineation of Landslides, Flash Flood and Debris Flow Hazards.
20
O'Brien, J. S. and Julien, P. Y. (1988). Laboratory Analysis of Mudflow Properties. Journal of Hydraulic Engineering, ASCE. 114(8): 877-887.
10.1061/(ASCE)0733-9429(1988)114:8(877)
21
O'Brien, J. S., Julien, P. Y., and Fullerton, W. T. (1993). Two-dimensional Water Flood and Mudflow Simulation. Journal of Hydraulic Engineering, ASCE. 119(2): 244-261.
10.1061/(ASCE)0733-9429(1993)119:2(244)
22
Rickenmann, D., Laigle, McArdell, B. W., and Hübl, J. (2006). Comparison of 2D Debris-flow Simulation Models with Field Events. Computational Geosciences. 10(2): 241-264.
10.1007/s10596-005-9021-3
23
Scheidl, C., McArdell, B., Nagl, G., and Rickenmann, D. (2019). Debris Flow Behavior in Super-and Subcritical Conditions. In Association of Environmental and Engineering Geologists; Special Publication 28. Colorado School of Mines. Arthur Lakes Library.
24
Xi-lin, L. I. U. (2000). Regional Risk Assessment on Debris Flow. Journal of Natural Disasters. 9(1): 54-61.

Korean References Translated from the English

1
김성덕, 이호진, 장형준 (2019). 사방댐 위치변화에 따른 토석류의 충격력 해석에 관한 연구. 한국산학기술학회. 20(1): 409-418.
2
김승은, 백중철, 김경석 (2013). FLO-2D 모형을 이용한 우면산 토석류 유동 수치모의. 대한토목학회. 33(3): 965-974.
10.12652/Ksce.2013.33.3.965
3
김영환, 전병희, 전계원 (2019). 정밀토양도를 이용한 태백산국립공원의 사면안정성 평가. 한국방재안전학회. 12(2): 65-72.
4
산림청 (2007). 우리나라의 산은 몇 개나 될까?-산림청, 전국 산통계 발표-. 대전광역시: 산림청.
5
산림청 (2015). 토석류 취약지역 방재대책. 대전광역시: 산림청.
6
이준선, 송창근, 김홍택, 이승오 (2015). 전파면의 경사에 따른 토석류 흐름양상에 대한 연구. 한국안전학회. 30(3): 52-58.
10.14346/JKOSOS.2015.30.3.52
7
장창봉, 최영남 ,유남재 (2017). 토석류의 거동특성 및 유발강우에 관한 연구. 한국지반환경공학회. 18(1): 13-21.
10.14481/jkges.2017.18.1.13
8
정승원 (2010). 토석류의 흐름특성: 유동학의 필요성. 한국지구물리·물리탐사학회(KSEG) 2010 학술발표회. 79-80.
9
한국도로공사(2017). 공용 고속도로 토석류 위험평가 및 대책 적용방안 수립. 성남시: 한국도로공사.
10
행정안전부(2018) 토석류 위험도 평가기준. 세종시: 행정안전부.
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 : 13
  • No :3
  • Pages :45-58
  • Received Date : 2020-07-26
  • Revised Date : 2020-08-15
  • Accepted Date : 2020-09-05
  • DOI :https://doi.org/10.21729/ksds.2020.13.3.45
Journal Informaiton Journal of Korean Society of Disaster and Security Journal of Korean Society of Disaster and Security
Online submission
  • KISTI Current Status
  • KISTI Cited-by
  • KCI 문헌 유사도 검사
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close