Relationships between typhoon types and debris flow disasters in Taiwan |
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Authors: | Jieh-Jiuh Wang Hoe I. Ling |
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Affiliation: | 1. Department of Architecture, Ming Chuan University, 5 De-Ming Rd., Kuei-shang, Taoyung County, 333, Taiwan 2. Department of Civil Engineering and Engineering Mechanics, Columbia University, 500 West 120th Street, New York, NY, 10027, USA
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Abstract: | Frequent debris flow disasters caused by heavy precipitation during the annual typhoon season are some of the most serious disasters in Taiwan. This study is on the debris flow disasters associated with the typhoons that hit Taiwan between 1986 and 2004. Typhoon data and records of debris flow disasters available for Nantou and Hualien counties in Taiwan were analyzed. The paths and rainfall characteristics of typhoons were found to have a great effect on the debris flows at these locations. Accordingly, the typhoons were grouped into four major types based on their paths and related disasters. The relationships between rainfall intensity and accumulation and debris flow are discussed for the four major typhoon types. The information may form the basis for providing useful indicators for disaster management. |
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