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Effects of frequent debris flows on barrier lake formation, sedimentation and vegetation disturbance, Palongzangbo River, Tibetan Plateau

文献类型：期刊论文

作者Meng, Zhe6; Lyu, Liqun6; Xu, Mengzhen5; Yu, Guoan4; Ma, Chao6; Wang, Zhaoyin5; Stoffel, Markus1,2,3
刊名CATENA
出版日期2023
卷号220页码:11
关键词Debris flow Barrier lake Sedimentation Stepped river Tree growth disturbance Dendrogeomorphology
ISSN号0341-8162
DOI10.1016/j.catena.2022.106697
通讯作者Lyu, Liqun(Lvliqunqinghua@126.com)
英文摘要In incised mountain valleys, debris flows often cause damage to vegetation, especially when debris flows form fans or block receiving rivers. In such contexts, riparian trees may be partially buried in aggrading fans or temporary lakes. The Guxiang gully is the largest debris flow system along the Palongzangbo River on the Ti-betan Plateau and at least 13 debris flows (volume > 104 m3) have occurred since 1953. Four of these debris flows (in 1953, 1965, 1975 and 2005) dammed the river forming a barrier lake which is now more than 25 km in length. The repeated damming by debris flows has increased the dam height and thereby affected the sedi-mentation rates in the barrier lake. The frequent debris flow activity has prevented vegetation recovery on the fan, while sedimentation in the barrier lake has allowed vegetation to colonize the deltas. This study investigated the effects of frequent debris flow damming on sedimentation rates as well as on revegetation and tree distur-bance along the river. We documented the landscape evolution and measured the sedimentation thickness and grain size of deposited material at different locations of the barrier lake using cores. We also collected and analyzed growth-ring records from disturbed trees on the fan and the deltas of the barrier lake. We found that frequent debris flows had created a stepped river morphology and greatly increased sedimentation rates in the lake, affecting vegetation on the fan and behind the dam.
WOS关键词CLIMATE-CHANGE ; GROWTH-RESPONSE ; ALLUVIAL FANS ; LARIX-DECIDUA ; TREE-RINGS ; EVOLUTION ; PATTERNS ; RECONSTRUCTION ; MAGNITUDE ; MOUNTAINS
资助项目Fundamental Research Funds for the Central Universities[BLX201908] ; National Natural Science Foundation of China[41907229] ; National Natural Science Foundation of China[41790434] ; National Natural Science Foundation of China[41971010] ; Chinese Academy of Sciences[XDA23090401] ; Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0903]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:000877768900001
出版者ELSEVIER
资助机构Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program
源URL[http://ir.igsnrr.ac.cn/handle/311030/188089]  
专题中国科学院地理科学与资源研究所
通讯作者Lyu, Liqun
作者单位1.Univ Geneva, Dept Forel Environm & Aquat Sci F A, Geneva, Switzerland
2.Univ Geneva, Dept Earth Sci, Dendrolab ch, Geneva, Switzerland
3.Univ Geneva, Inst Environm Sci, Climate Change Impacts & Risks Anthropocene C CIA, Geneva, Switzerland
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
5.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
6.Beijing Forestry Univ, Sch Soil & Water Conservat, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Meng, Zhe,Lyu, Liqun,Xu, Mengzhen,et al. Effects of frequent debris flows on barrier lake formation, sedimentation and vegetation disturbance, Palongzangbo River, Tibetan Plateau[J]. CATENA,2023,220:11.
APA Meng, Zhe.,Lyu, Liqun.,Xu, Mengzhen.,Yu, Guoan.,Ma, Chao.,...&Stoffel, Markus.(2023).Effects of frequent debris flows on barrier lake formation, sedimentation and vegetation disturbance, Palongzangbo River, Tibetan Plateau.CATENA,220,11.
MLA Meng, Zhe,et al."Effects of frequent debris flows on barrier lake formation, sedimentation and vegetation disturbance, Palongzangbo River, Tibetan Plateau".CATENA 220(2023):11.

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来源：地理科学与资源研究所

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