干旱区生态环境知识资源中心(Arid): Gravel-Desert Surface Properties and Their Influences on the Wind-Erosion Threshold Friction Velocity in North-West China

Arid

DOI	10.1007/s10546-020-00589-8
	Gravel-Desert Surface Properties and Their Influences on the Wind-Erosion Threshold Friction Velocity in North-West China
	Zhang, Zhengcai; Dong, Zhibao; Qian, Guangqiang; Dong, Zhi
通讯作者	Zhang, ZC (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China.
来源期刊	BOUNDARY-LAYER METEOROLOGY
ISSN	0006-8314
EISSN	1573-1472
出版年	2021
卷号	179 期号:1 页码:117-131
英文摘要	In north-west China, extensive areas of gravel desert exist, whose surface properties have an important effect on the wind-erosion threshold friction velocity u(t). In this study, we use four models and field observations of gravel mass fraction, soil physical crust, and soil clay content to assess the effect of gravel-surface properties on the value of u(t). Results show that gravel coverage in north-west China ranges between 0.07 and 1.00 (with amean of 0.67), and about 81% of the sites investigated are covered by soil physical crust. Clay content is 2.4% on average in the study region, less than 2% in 52.1% of that region, and between 2 and 4% in the remaining study regions. The four regions where clay content is greater than the mean include the western Alxa Plain, the alluvial fan of the western Alxa Plain, the northern Alxa Plain, and the Hexi Corridor. In the study region, the value of u(t) ranges between 0.12 and 0.78 m s(-1) (with a mean of 0.45 m s(-1)). Soil moisture, gravel coverage, and soil physical crust all affect the magnitude of u(t). A principal component analysis indicates that the soil crust contributes of about 62% of the u(t) variations, soilmoisture 25%, and surface roughness 9%. A variance analysis shows clear spatial differences in the magnitude of u(t) in north-west China due to the spatial variations in gravel land-surface properties.
英文关键词	Clay content Gravel coverage Gravel desert Soil physical crust Threshold friction velocity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000607776800008
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349753
作者单位	[Zhang, Zhengcai; Qian, Guangqiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China; [Dong, Zhibao] Shaanxi Normal Univ, Coll Tourism & Environm, Xian 710119, Shaanxi, Peoples R China; [Dong, Zhi] Shandong Agr Univ, Forest Coll, Tai An 271018, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhengcai,Dong, Zhibao,Qian, Guangqiang,et al. Gravel-Desert Surface Properties and Their Influences on the Wind-Erosion Threshold Friction Velocity in North-West China[J],2021,179(1):117-131.
APA	Zhang, Zhengcai,Dong, Zhibao,Qian, Guangqiang,&Dong, Zhi.(2021).Gravel-Desert Surface Properties and Their Influences on the Wind-Erosion Threshold Friction Velocity in North-West China.BOUNDARY-LAYER METEOROLOGY,179(1),117-131.
MLA	Zhang, Zhengcai,et al."Gravel-Desert Surface Properties and Their Influences on the Wind-Erosion Threshold Friction Velocity in North-West China".BOUNDARY-LAYER METEOROLOGY 179.1(2021):117-131.