Levee failure mechanisms during the extreme rainfall event: A case study in Southern Taiwan

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题名:	Levee failure mechanisms during the extreme rainfall event: A case study in Southern Taiwan
作者:	黃文昭;Huang, Wen-Chao;Weng, Meng-Chia;Chen, Ray-Kuo
贡献者:	工學院土木工程學系
关键词:	Civil Engineering;Data analysis;Earth and Environmental Science;Earth Sciences;Earth, ocean, space;Engineering and environment geology. Geothermics;Environmental Management;Exact sciences and technology;Extreme weather;Failure;Failure mechanisms;Floods;Foundation failure;Foundations;Freshwater;Geophysics/Geodesy;Geotechnical Engineering & Applied Earth Sciences;Hydrogeology;Levees;Levees & battures;Natural Hazards;Natural hazards: prediction, damages, etc;Original Paper;Rainfall;Rainfall measurement;River basins;Sliding;Slope stability;Typhoons;Water levels;Weather
日期:	2014-01-01
上传时间:	2026-04-21 13:43:10 (UTC+8)
出版者:	Springer Netherlands;Dordrecht: Springer Netherlands
摘要:	摘要： Extreme weather has recently caused many disasters worldwide. In August 8, 2009, Southern Taiwan suffered from serious floods during Typhoon Morakot. In this extreme rainfall event, the Chiuliao first levee in the Laonong River basin experienced catastrophic failure. Therefore, this study focuses on the levee failure mechanisms based on variations in levee water levels. Specifically, this study investigates four mechanisms based on limit state equilibrium. The first mechanism involves the slope stability under hydrostatic conditions at various water levels. The results of this analysis show that the levee cannot fail under this mechanism. The second mechanism involves the levee slope stability with steady-state seepage. Because the water levels are different on the protected and flood sides, the water recedes much faster on the flood side than the protected side. Based on this analysis, the levee slope might fail when the water level at the protected side is close to the top of levee and the water level at the flood side starts to recede. The third and fourth mechanisms involve the levee foundation failure in terms of sliding and overturning failure. The results of this study indicate that the levee foundation is more prone to sliding failure than overturning failure. Based on these results, this study shows that the levee failed when the water level at the protected side neared the top of levee while the water level at flood side started to recede. At this moment, the levee may fail because of both the slope failure with seepage and sliding failure of the levee foundation. 其他題名： Nat Hazards 出版者： Dordrecht: Springer Netherlands 出版日期： 2014-01 出處： Natural hazards (Dordrecht), 2014-01, Vol.70 (2), p.1287-1307 資源來源： Agricultural & Environmental Science Collection 版權： The Author(s) 2013 版權： 2015 INIST-CNRS 版權： Springer Science+Business Media Dordrecht 2014 識別號： ISSN: 0921-030X 識別號： ISSN: 1573-0840 識別號： EISSN: 1573-0840 識別號： DOI: 10.1007/s11069-013-0874-9
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