Modeling for Debris Flow Behavior on Expressway Using FLO-2D

FLO-2D를 이용한 고속도로에서의 토석류 거동 모델링

Lim, Jae-Tae;Kim, Byunghyun

  • Received : 2019.02.11
  • Accepted : 2019.03.06
  • Published : 2019.04.01


This study demonstrates the applicability of the FLO-2D for the influence analysis of the debris flow on expressway. To do this, the behavior of debris flow on the expressway was reproduced by applying the FLO-2D to actual generated debris flow. The study area is a part of the Deokyusan Service Area on the Daejon-Jinju Expressway, where traffic was blocked for 24 hours due to the debris flow in August 2005. Geographical analysis with GIS, hydrological analysis with HEC-HMS, and estimation of the amount of debris flow were carried out using field survey and soil property test data. Then, the optimum parameter combination of FLO-2D was selected through the parameter sensitivity analysis, and the behavior analysis of debris flow on expressway was applied. The comparison of the predictions with the observations shows the availability of FLO-2D for the behavior analysis of debris flow on the expressway.


Debris flow;Expressway damage;FLO-2D;Parameter estimation