干旱区生态环境知识资源中心(Arid): Biocrust as a surface protection of erodible nebkhas

Arid

DOI	10.1002/esp.5958
	Biocrust as a surface protection of erodible nebkhas
	Tan, Ning-Jing; Luo, Xiao-Mei; Wang, Zhen-Ting
通讯作者	Wang, ZT
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2024
英文摘要	Since the timescale of a nebkha from the initial formation to the eventual destruction might be 1 to 200 years, little is known about the whole evolutionary path. In the phase of erosion and deflation, nebkhas are usually one source of aeolian sand and dust. Biocrust, a common living cover in arid and semiarid regions, could influence dune dynamic. In this study, the shear strength and hardness of the windward slope surface of erodible nebkhas are measured in the upwind margin of the Minqin oasis, China. It is found that both the shear strength and hardness of topsoil are commonly larger than these under the biocrust layer. From the force-balance equation about the vane shear test, a novel expression for the shear strength of biocrust is derived. The field experiment in the windy season of 2023 shows that the biocrust layer of topsoil can effectively increase the resistance of nebkha surface against wind erosion. The relative larger strength and the self-repair function of biocrust supported by the local non-rain water are two main reasons the erodible nebkhas can exist for decades. A novel expression for the shear strength of biocrust is derived from the force-balance equation about the vane shear test. The biocrust layer can effectively increase the resistance of nebkha surface against wind erosion. Continuously supported by biocrusts, erodible nebkhas might exist for decades.image
英文关键词	biocrust hardness nebkha shear strength wind erosion
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001291075700001
WOS关键词	BIOLOGICAL SOIL CRUST ; MOJAVE DESERT ; MICROPENETROMETER ; MICROSTRUCTURE ; CYANOBACTERIA ; TRANSPORT ; EMISSION ; SEDIMENT ; OASIS ; DUNES
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403323
推荐引用方式 GB/T 7714	Tan, Ning-Jing,Luo, Xiao-Mei,Wang, Zhen-Ting. Biocrust as a surface protection of erodible nebkhas[J],2024.
APA	Tan, Ning-Jing,Luo, Xiao-Mei,&Wang, Zhen-Ting.(2024).Biocrust as a surface protection of erodible nebkhas.EARTH SURFACE PROCESSES AND LANDFORMS.
MLA	Tan, Ning-Jing,et al."Biocrust as a surface protection of erodible nebkhas".EARTH SURFACE PROCESSES AND LANDFORMS (2024).