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The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu River, southwestern China
Dai, FC; Lee, CF; Deng, JH; Tham, LG
2005
Source PublicationGEOMORPHOLOGY
ISSN0169-555X
Volume65Issue:3-4Pages:205-221
Abstract

Chinese historic documents recorded that on June 1, 1786, a strong M=7.75 earthquake occurred in the Kangding-Luding area, Sichuan, southwestern China, resulting in a large landslide that fell into the Dadu River. As a result, a landslide dam blocked the river. Ten days later, the sudden breaching of the dam resulted in catastrophic downstream flooding. Historic records document over 100,000 deaths by the flood. This may be the most disastrous event ever caused by landslide dam failures in the world. Although a lot of work has been carried out to determine the location, magnitude and intensity of the 1786 earthquake, relatively little is known about the occurrence and nature of the landslide dam. In this paper, the dam was reconstructed using historic documents and geomorphic evidence. It was found that the landslide dam was about 70 m high, and it created a lake with a water volume of about 50 x 10(6) m(3) and an area of about 1.7 km(2). The landslide dam breached suddenly due to a major aftershock on June 10, 1786. The peak discharge at the dam breach was estimated using regression equations and a physically based predictive equation. The possibility of a future failure of the landslide seems high, particularly due to inherent seismic risk, and detailed geotechnical investigations are strongly recommended for evaluating the current stability of the landslide. (C) 2004 Elsevier B.V. All rights reserved.

KeywordLandslide Dam Breach Flood Discharge Earthquake
DOI10.1016/j.geomorph.2004.08.011
Indexed BySCI
Language英语
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000227347600003
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:109[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://119.78.100.198/handle/2S6PX9GI/3127
Collection岩土力学所知识全产出_期刊论文
AffiliationUniv Hong Kong, Dept Civil Engn; Chinese Acad Sci, Inst Geol & Geophys; Chinese Acad Sci, Wuhan Inst Rock & Soil Mech
Recommended Citation
GB/T 7714
Dai, FC,Lee, CF,Deng, JH,et al. The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu River, southwestern China[J]. GEOMORPHOLOGY,2005,65(3-4):205-221.
APA Dai, FC,Lee, CF,Deng, JH,&Tham, LG.(2005).The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu River, southwestern China.GEOMORPHOLOGY,65(3-4),205-221.
MLA Dai, FC,et al."The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu River, southwestern China".GEOMORPHOLOGY 65.3-4(2005):205-221.
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