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An Analysis of Debris-Flow Propagation Characteristics and Assessment of Building Hazard Mapping Using FLO-2D - The Case of Chuncheon Landslide Area -

  • Crisisonomy
  • Abbr : KRCEM
  • 2018, 14(2), pp.91-99
  • DOI : 10.14251/crisisonomy.2018.14.2.91
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general
  • Received : November 28, 2017
  • Accepted : January 22, 2018
  • Published : February 28, 2018

Choi Jung-ryel 1

1(주)SDMENC

Accredited

ABSTRACT

Urbanization of mountain areas is upscaling debris-flow damage including a lot of human casualties, such as the 2011 landslide in Chuncheon City in Korea. The purpose of this study is to understand the propagation characteristics of debris-flow using a numerical model and to quantitatively determine the hazard of urban buildings. For this purpose, we simulated debris-flow velocity and depth using the FLO-2D numerical analysis model and analyzed the potential effect in each damaged building by time of day. The correlation between the model results and the satellite images after the landslide was analyzed, and than the risk map was created by using the derived velocity and depth. Through this study, it was possible to quantitatively analyze the maximum flow velocity and depth of debris-flow in the form of raster and vector in the GIS lattice and to produce the risk map effectively by using the tools provided in FLO-2D.

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