干旱区生态环境知识资源中心(Arid): Converging Effects of Shrubs on Shadow Dune Formation and Sand Trapping

Arid

DOI	10.1029/2018JF004695
	Converging Effects of Shrubs on Shadow Dune Formation and Sand Trapping
	Yang, YanYan 1,2,3; Liu, LianYou 1,2; Shi, PeiJun 1,2,4; Zhao, MengDi 1; Dai, JiaDong 1; Lyu, YanLi 4; Zhang, GuoMing 1; Zuo, XiYang 1; Jia, QingPan 1; Liu, Yong 1; Liu, Yun 1
通讯作者	Liu, LianYou
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
ISSN	2169-9003
EISSN	2169-9011
出版年	2019
卷号	124 期号:7 页码:1835-1853
英文摘要	Shrubs have a patchy distribution under natural conditions. Spacing, as a quantitative parameter used to describe shrub distribution, influences the formation of vegetated aeolian landforms and sand trapping in sandy regions. In this study, the morphology and development of shadow dunes were investigated in a wind tunnel at different wind velocities for three pairs of various-sized artificial shrubs constructed from live branches and with different spacing patterns. The amount of sand trapped by these shrubs was also measured. With decreasing spacing between two adjacent shrubs, independent dunes, separate dunes that mutually curved toward each other, converging dunes, and coalesced dunes were sequentially observed. Two critical thresholds of shrub spacing were determined, for dune deformation (Td) and dune convergence (Tc). Td and Tc represent the spacings between two adjacent shrubs that result in isolated and independent shadow dunes starting to deform and converge in their tail areas, respectively. The spacing thresholds of shrubs increased with shrub size and decreased with wind velocity. The processes of shadow-dune development for two adjacent shrubs were classified into three types: separate, separate-converging, and coalesced. The amount of sand trapped by shrubs at spacings of Td. The converging effects of shrubs on shadow-dune formation and sand trapping decreased with wind velocity and increased with shrub size. The results suggest that the shadow dune morphology and sand trapping capacity of shrubs are governed by both wind regime and distribution pattern and size of shrubs.
英文关键词	shrub threshold spacing shadow dune morphology sand trapping capacity
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000481444100011
WOS关键词	WIND-TUNNEL SIMULATION ; MORPHOLOGICAL-CHARACTERISTICS ; SEDIMENT TRANSPORT ; SPARSE VEGETATION ; FLOW PATTERNS ; BURIAL ; GROWTH ; DYNAMICS ; NEBKHAS ; DESERT
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217095
作者单位	1.Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, MOE, Beijing, Peoples R China; 2.Beijing Normal Univ, Engn Res Ctr Desertificat & Blown Sand Control, MOE, Beijing, Peoples R China; 3.Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing, Peoples R China; 4.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yang, YanYan,Liu, LianYou,Shi, PeiJun,et al. Converging Effects of Shrubs on Shadow Dune Formation and Sand Trapping[J]. 北京师范大学,2019,124(7):1835-1853.
APA	Yang, YanYan.,Liu, LianYou.,Shi, PeiJun.,Zhao, MengDi.,Dai, JiaDong.,...&Liu, Yun.(2019).Converging Effects of Shrubs on Shadow Dune Formation and Sand Trapping.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,124(7),1835-1853.
MLA	Yang, YanYan,et al."Converging Effects of Shrubs on Shadow Dune Formation and Sand Trapping".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 124.7(2019):1835-1853.