干旱区生态环境知识资源中心(Arid): A comparison of the aerodynamic characteristics of four kinds of land surface in wind erosion areas of northern China

Arid

DOI	10.1016/j.catena.2022.106112
	A comparison of the aerodynamic characteristics of four kinds of land surface in wind erosion areas of northern China
	Zhang, Chunlai; Yuan, Yixiao; Zou, Xueyong; Wang, Hongtao; Li, Qing; Wang, Zhenting; Wang, Rende
通讯作者	Zhang, CL ; Yuan, YX
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	212
英文摘要	Aerodynamic characteristics is a crucial factor influencing soil wind erosion, which is closely related to the properties of surface roughness elements. In the expansive arid and semi-arid northern China, grassland, farmland, mobile sandy land, and gobi are the main land surface types that suffer wind erosion to varying degrees. To investigate the aerodynamic characteristics of different surfaces, we used three-dimensional ultrasonic anemometers to observe the near-surface wind speed above grassland, farmland, mobile sand, and two types of gobi surfaces in areas of northern China (a total of five observation sites). We compared the aerodynamic characteristics of the five surfaces and their causes (i.e., the surface roughness length, wind speed pulsation, turbulence intensity, and drag coefficient), and analyzed how surface roughness elements weakened the airflow. The roughness length was greatest for grassland, followed by farmland, sand, fine gobi, and black gobi. The pulsation intensity of near-surface wind speed increased linearly with increasing wind speed at all sites. At a given wind speed, increasing roughness length increased the pulsation intensity of wind speed. The probability distributions for the drag coefficient and turbulence intensity of the five surfaces followed a positively skewed distribution. The drag coefficient and turbulence intensity were greatest for grassland, followed by farmland, sand, fine gobi, and black gobi surfaces. The drag force exerted on the roughness elements increased with increasing wind speed, but the ratio of drag force exerted on the roughness elements to the total drag force (tau R/tau) for flexible roughness elements (i.e., plants) increased as the wind speed increased; for rigid roughness elements, tau R/tau decreased with increasing wind speed. This confirms that the shelter capability of flexible roughness elements against soil wind erosion increases with the increase of wind speed, while that of rigid roughness elements is opposite.
英文关键词	Drag coefficient Flexible roughness element Rigid roughness element Surface stability Wind erosion
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000790442800004
WOS关键词	DRAG COEFFICIENTS ; SAND TRANSPORT ; ROUGHNESS LENGTH ; SOIL PROPERTIES ; SALTATION ; FLOW ; DESERTIFICATION ; TURBULENCE ; TILLAGE ; HEIGHT
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392086
推荐引用方式 GB/T 7714	Zhang, Chunlai,Yuan, Yixiao,Zou, Xueyong,et al. A comparison of the aerodynamic characteristics of four kinds of land surface in wind erosion areas of northern China[J],2022,212.
APA	Zhang, Chunlai.,Yuan, Yixiao.,Zou, Xueyong.,Wang, Hongtao.,Li, Qing.,...&Wang, Rende.(2022).A comparison of the aerodynamic characteristics of four kinds of land surface in wind erosion areas of northern China.CATENA,212.
MLA	Zhang, Chunlai,et al."A comparison of the aerodynamic characteristics of four kinds of land surface in wind erosion areas of northern China".CATENA 212(2022).