干旱区生态环境知识资源中心(Arid): Reevaluation of the aeolian sand flux from the Ulan Buh Desert into the upper Yellow River based on in situ monitoring updates

Arid

DOI	10.1016/j.geomorph.2018.11.009
	Reevaluation of the aeolian sand flux from the Ulan Buh Desert into the upper Yellow River based on in situ monitoring updates
	Tian, Shimin 1; Yu, Guo-An 2; Jiang, Enhui 1; Guo, Jianying 3; Li, Zhiwei 4; Wang, Yuanjian 1
通讯作者	Yu, Guo-An
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2019
卷号	327 页码:307-318
英文摘要	Aeolian sand transport into rivers is a crucial factor influencing channel sediment dynamics and fluvial processes in rivers that flow through desert areas. Few studies have examined the dynamic processes, controlling factors, and the amount of aeolian sand transported into river channels. Here, we report a case study of aeolian sand transport into in the upper reaches of the Yellow River as it flows along the eastern margin of the Ulan Buh Desert, which is a major desert in northern China. The present study is based on systematic monitoring of wind flow characteristics, aeolian sediment dynamics (saltation, creep and suspension), and the migration of typical sand dunes (mobile, semi-anchored, and anchored) from 2013 to 2016. The relationship between wind speed and wind-blown sand transport in the study area was determined. The relationship between the rate of aeolian sand transport (saltation and creep) and the wind speed 2 m above the ground surface can be depicted with a polynomial relation when the wind speed is >= 5.7 m/s, and with a power function when the wind speed is <5.7 m/s. Dune migration mainly occurred during March to May, and the dune migration rate was influenced by wind speed and other factors such as dune height and vegetation conditions. The rate of aeolian sand transport by wind-blown sand flow (particle saltation, creep, and suspension) and sand dune migration were calculated, and the annual aeolian sand transport rates into the river channel in 2013, 2014, 2015 and 2016 were estimated to be 1.47, 0.86, 0.52, and 0.50 million t/yr, respectively. These results are significantly lower than previous estimates made between the 1980s and 2000s. The decrease in sand flux may be attributed to the regional decline in wind speed over the last six decades which has caused a sharp reduction of the aeolian sand transport rate, the improved vegetation coverage in this area which has reduced the area of active and mobile dunes, and an embankment constructed adjacent to the Yellow River which has suppressed aeolian sand migration into the river channel. (C) 2018 Elsevier B.V. All rights reserved.
英文关键词	Upper Yellow River Ulan Buh Desert Wind-blown sand transport Dune migration Aeolian sand flux
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000456491600021
WOS关键词	HYPER-CONCENTRATED FLOW ; FLUVIAL INTERACTIONS ; COLORADO RIVER ; WIND-SPEED ; SEDIMENT TRANSPORT ; EOLIAN SEDIMENT ; SIMPSON DESERT ; DUNES ; SURFACE ; CHINA
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216002
作者单位	1.Yellow River Inst Hydraul Res, Key Lab Yellow River Sediment, Zhengzhou 450003, Henan, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, 11A Datun Rd, Beijing 100101, Peoples R China; 3.MWR, Inst Water Resources Pastoral Area, Hohhot 010020, Peoples R China; 4.Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Tian, Shimin,Yu, Guo-An,Jiang, Enhui,et al. Reevaluation of the aeolian sand flux from the Ulan Buh Desert into the upper Yellow River based on in situ monitoring updates[J]. 中国科学院地理科学与资源研究所,2019,327:307-318.
APA	Tian, Shimin,Yu, Guo-An,Jiang, Enhui,Guo, Jianying,Li, Zhiwei,&Wang, Yuanjian.(2019).Reevaluation of the aeolian sand flux from the Ulan Buh Desert into the upper Yellow River based on in situ monitoring updates.GEOMORPHOLOGY,327,307-318.
MLA	Tian, Shimin,et al."Reevaluation of the aeolian sand flux from the Ulan Buh Desert into the upper Yellow River based on in situ monitoring updates".GEOMORPHOLOGY 327(2019):307-318.