Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/nhess-2016-2
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
26 Jan 2016
Review status
This discussion paper is a preprint. It has been under review for the journal Natural Hazards and Earth System Sciences (NHESS). The revised manuscript was not accepted.
GIS-based Real-time Framework of Debris Flow Hazard Assessment for Expressways in Korea
C. K. Chung1, H. S. Kim2, S. R. Kim2, and K. S. Kim3 1Department of Civil and Environmental Engineering, Seoul National University, Seoul, Korea
2Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources, Daejeon, Korea
3Expressway & Transportation Research Institute, Korea Expressway Corporation, Hwaseong, Korea
Abstract. Debris flows caused by heavy rainfall in mountain areas near expressways lead to severe social and economic loss and sometimes even result in casualties. However, in Korea, the design of road structures that resist these debris flow incidents are generally not carried out in a systematic way with proper concepts or procedures. Therefore, the development of a real-time system for debris flow hazard assessment is necessary to provide preliminary information for rapid decision making of evacuations or restoration measures, and to prevent second-hand disasters caused by debris flows. Recently, various map-based approaches have been proposed using multi-attribute criteria and assessment methods for debris flow susceptibilities. However, for the macro-zonation of debris flow hazards at a national scale, a simplified method such as the Korea Expressway Corporation debris flow hazard assessment method is appropriate and also applicable for systemization based on GIS and monitoring networks. In this study, a GIS-based real-time framework of debris flow hazards for expressway sections was newly proposed based on the KEC debris flow hazard assessment method. First, the KEC-based method was standardized in a systematic fashion using ESRI ArcGIS, enabling the objective and quantitative acquisition of various attribute datasets. Also, for a more precise assessment, the quantification of rainfall criteria was considered. Finally, a safety management system for debris flow hazards was developed based on a GIS platform, and was applied and verified on three expressway sections in Korea.

Citation: Chung, C. K., Kim, H. S., Kim, S. R., and Kim, K. S.: GIS-based Real-time Framework of Debris Flow Hazard Assessment for Expressways in Korea, Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2016-2, 2016.
C. K. Chung et al.
C. K. Chung et al.

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Short summary
The development of a real-time system for debris flow hazard assessment is necessary to provide preliminary information for rapid decision making of evacuations or restoration measures and to prevent second-hand disasters caused by debris flows. In this study, a GIS-based real-time framework of debris flow hazards for expressway sections was newly proposed and a safety management system for debris flow hazards was developed using Korea Expressway Corporation debris flow hazard assessment method.
The development of a real-time system for debris flow hazard assessment is necessary to provide...
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