Landslide and alluvial fan caused by an extreme rainfall in Suao, Taiwan

H. T. Chou, C. F. Lee, Chia-Ming Lo, C. P. Lin

研究成果: Conference contribution同行評審

6 引文 斯高帕斯(Scopus)

摘要

Typhoon Megi coupling with northeastern monsoon induced an extreme rainfall of 939 mm upon the Suao area, Yilan county, eastern Taiwan on 21 October, 2010. Such a heavy rainfall triggered many up-slope landslides along the coast highway Route 9. During Typhoon Megi, a landslide of 2.1 million m3 was transformed into a debris flow along a steep ravine across Route 9, then formed an alluvial fan at the Pacific coastline. In the present work, the field survey, rainfall histogram, airborne and terrestrial laser scanning data, and high-resolution Digital Elevation Model (DEM) were used to quantify the morphological change before and after this event. The fan slope and the drainage-basin area follow the power law relationship as proposed by Hooke (1968). Field observation exhibits the slopes of 8.9° for the sub-aerial alluvial fan. The submarine slope of the alluvial fan is milder than the sub-aerial due to strong wind-wave forcings. The 3-D numerical simulation was also performed to explore the dynamics of the debris avalanche process.

原文English
主出版物標題Landslides and Engineered Slopes
主出版物子標題Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012
編輯Erik Eberhardt, Corey Froese, A. Keith Turner, Serge Leroueil
發行者CRC Press/Balkema
頁面487-494
頁數8
ISBN(列印)9780415621236
出版狀態Published - 2012
事件11th International Symposium on Landslides and 2nd North American Symposium on Landslides, 2012 - Banff, Canada
持續時間: 2 6月 20128 6月 2012

出版系列

名字Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012

Conference

Conference11th International Symposium on Landslides and 2nd North American Symposium on Landslides, 2012
國家/地區Canada
城市Banff
期間2/06/128/06/12

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