Mass flows and river response in rapid uplifting regions - A case of lower Yarlung Tsangpo basin, southeast Tibet, China

doi:10.1016/j.ijsrc.2020.05.006

	Mass flows and river response in rapid uplifting regions - A case of lower Yarlung Tsangpo basin, southeast Tibet, China
	Yu, Guo-An 2; Lu, Jianyin 2,3; Lyu, Liqun 4; Han, Lujie 1; Wang, Zhaoyin 1
刊名	INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
	2020-12-01
卷号	35 期号:6 页码:609-620
关键词	Mass flow Debris flow Glacial erosion Fluvial processes Negative feedback
ISSN号	1001-6279
DOI	10.1016/j.ijsrc.2020.05.006
通讯作者	Yu, Guo-An(yuga@igsnrr.ac.cn)
英文摘要	The fluvial geomorphology in tectonically active (particularly rapid uplift) regions often undergoes continuous change. The rapid uplift is coincident with high erosion rates; consequently, incised valleys are formed. Mass flows (for example, avalanches, landslides, and debris flows) in incised valleys can markedly influence fluvial processes and even reshape valley geomorphology. However, these processes and long-term evolution corresponding to mass flows require further clarification. Field campaigns were carried out in the region near the Yigong Tsangpo and Palong Tsangpo Rivers (hereafter the Yigong and Palong Rivers), the two largest tributaries of the lower Yarlung Tsangpo River Tibet, China, to examine the feedback between fluvial processes and mass flows. Remote sensing images from recent decades were used to compare the channel morphology before and after typical mass flows (particularly catastrophic ones). The morphology of the lower Yigong River has evidently been impacted by landslides, while that of the Palong River has mainly been shaped by glacial processes and debris flows. At present, the morphology of the latter consists of alternating sections of gorges and wide valleys, with a staircase-like longitudinal profile. The gorge sections exhibit single and deeply incised channels with a high-gradient channel bed and terraces. In contrast, the wide valley sections consist of lakes, braided or anabranching channels, gentle bed gradients, and thick alluvial deposits. Debris flows occur more frequently in gullies in the reaches of the gorge sections and rarely in gullies along the wide valley sections. The occurrence of mass flow events has resulted in an imbalance of the previous (quasi-)equilibrium in the river morphology; however, this has triggered negative feedback that is driving the transient river morphology to a new state of (quasi-)equilibrium. (C) 2020 International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research. Published by Elsevier B.V. All rights reserved.
资助项目	National Key R&D Program of China[2018YFC1505201] ; National Natural Science Foundation of China[41971010]
WOS关键词	DEBRIS FLOWS ; LANDSCAPE RESPONSE ; CATASTROPHIC LANDSLIDES ; TRANSIENT LANDSCAPE ; ROCK UPLIFT ; INCISION ; PLATEAU ; EVOLUTION ; SEDIMENT ; PROFILES
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	IRTCES
WOS记录号	WOS:000563539100005
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/158046]
专题	中国科学院地理科学与资源研究所
通讯作者	Yu, Guo-An
作者单位	1.Tsinghua Univ, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Beijing Forestry Univ, Sch Soil & Water Conservat, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Yu, Guo-An,Lu, Jianyin,Lyu, Liqun,et al. Mass flows and river response in rapid uplifting regions - A case of lower Yarlung Tsangpo basin, southeast Tibet, China[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2020,35(6):609-620.
APA	Yu, Guo-An,Lu, Jianyin,Lyu, Liqun,Han, Lujie,&Wang, Zhaoyin.(2020).Mass flows and river response in rapid uplifting regions - A case of lower Yarlung Tsangpo basin, southeast Tibet, China.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,35(6),609-620.
MLA	Yu, Guo-An,et al."Mass flows and river response in rapid uplifting regions - A case of lower Yarlung Tsangpo basin, southeast Tibet, China".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 35.6(2020):609-620.