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DOI	10.1016/j.geomorph.2020.107293
	Morpho-sedimentary and stratigraphic characteristics of the 2000 Yigong River landslide dam outburst flood deposits, eastern Tibetan Plateau
	Wu, Chaohua; Hu, Kaiheng; Liu, Weiming; Wang, Hao; Hu, Xudong; Zhang, Xiaopeng
通讯作者	Hu, KH (通讯作者)
发表日期	2020
ISSN	0169-555X
EISSN	1872-695X
卷号	367
英文摘要	Sedimentary characteristics of landslide dam outburst flood deposits are distinct from those of rainfall flood deposits due to their very high hydraulic energy and sediment concentration. While they have been studied well in geological record, investigations of modern outburst flood deposits are relatively rare. Well-preserved flood deposits and landforms caused by the June 2000 landslide dam outburst flood in the Yigong River, eastern Tibet provide an opportunity to evaluate such sedimentological response to a high energy modern event. The sedimentary characteristics of boulder bars and channel evolution over c. 17 km downstream of the breach were investigated by field survey and remote sensing interpretation. The results show that the post-flood channel migrated downstream and increased in curvature. The bar shape is very little changed toward downstream, but the bar area shows a fluctuating decrease. Poorly sorted accumulations composed of massive granular gravels and boulders near the breach indicate sediment-rich bedload depositing processes occurred during rapid rising stage flows. In contrast, there are eddy bars and deposition of fine gravel with horizontally bedded laminations 17 km downstream of the dam, suggesting suspended sediment dominated deposition with a rapid loss of transport capacity. Comparison with previous hydrodynamic simulations indicates that the rates of the rising stage and the falling stage strongly affect the sedimentary characteristics of boulder bars and slackwater deposits. (C) 2020 Elsevier B.V. All rights reserved.
关键词	NAMCHE-BARWA SYNTAXIS HIMALAYAN SYNTAXIS TSANGPO GORGE LATE PLEISTOCENE METAMORPHIC EVOLUTION JOKULHLAUP DEPOSITS CHANNELED SCABLANDS ALTAI MOUNTAINS LAKE EROSION
英文关键词	Yigong River; Eastern Tibet; Landslide dammed lake; Outburst flood; Sedimentology
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000564548800006
来源期刊	GEOMORPHOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259892
推荐引用方式 GB/T 7714	Wu, Chaohua,Hu, Kaiheng,Liu, Weiming,et al. Morpho-sedimentary and stratigraphic characteristics of the 2000 Yigong River landslide dam outburst flood deposits, eastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2020,367.
APA	Wu, Chaohua,Hu, Kaiheng,Liu, Weiming,Wang, Hao,Hu, Xudong,&Zhang, Xiaopeng.(2020).Morpho-sedimentary and stratigraphic characteristics of the 2000 Yigong River landslide dam outburst flood deposits, eastern Tibetan Plateau.GEOMORPHOLOGY,367.
MLA	Wu, Chaohua,et al."Morpho-sedimentary and stratigraphic characteristics of the 2000 Yigong River landslide dam outburst flood deposits, eastern Tibetan Plateau".GEOMORPHOLOGY 367(2020).