Loss Curve Analysis of a Debris Flow: A Case Study on the Daniao Tribe

Abstract:

The post-disaster recovery from a debris flow imposes a heavy financial burden on a government; thus, it is necessary for governmental agencies use their limited resources effectively. In this study, we focus on the loss curve assessment, the framework of which includes hazard simulation, exposure evaluation and loss assessment. A numerical program named DEBRIS-2D is used to simulate debris flow hazards of different scale. Then, the latest land usage data and the economic loss model are factored in for exposure and loss assessment. In August 2009, Typhoon Morakot hit Taiwan and horrendous disasters resulted, including large-scale landslides and debris flows. The Daniao tribe in Taitung in eastern Taiwan was hit by one of these debris flows, with a debris-flow volume in excess of 500,000 m3, which was beyond the scope of any recovery plan. We simulate the hazards of the debris flow in different volumes and build the loss curve in relation. Notably, the practice of assessing damage caused by such disasters can help in assessing possible losses before they occur, thus allowing governments to take the necessary precautionary measures.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 1499-1510
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.1499
• Online since: January 2013
• Authors: Hsin Chi Li, Ko Fei Liu, Yu Charn Hsu
• Keywords: Debris Flow, Hazard Simulation, Loss Curve

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