干旱区生态环境知识资源中心(Arid): Airflow Field Around Hippophae rhamnoides in Alpine Semi-Arid Desert

Arid

DOI	10.3390/land9050140
	Airflow Field Around Hippophae rhamnoides in Alpine Semi-Arid Desert
	Tian, Lihui 1; Wu, Wangyang 2; Zhang, Dengshan 1; Yu, Yang 3
通讯作者	Wu, Wangyang
来源期刊	LAND
EISSN	2073-445X
出版年	2020
卷号	9 期号:5
英文摘要	The research on wind regimes and the wind protection mechanism of sand-fixing plants has mainly relied on wind tunnel experiments; few observations have been made in the field. At the same time, airflow around individual standing vegetation elements and communities is relatively lacking in alpine semi-arid deserts. Therefore, this paper selected 10-year-oldHippophae rhamnoides(sea buckthorn) on sandy land on the eastern shore of Qinghai Lake as the study object. Based on spatial and temporal changes of wind regime in the afforestation forest, a structural simulation of airflow near the plant and at different layers above the ground, and the annual changes in wind protection, we studied the wind protection mechanisms ofH. rhamnoidesas single elements or communities. The results were as follows: the effective protection length of the sublayer ofH. rhamnoideswas 1.0 to 1.8 m. The higher the layer, the smaller the decrease in wind velocity behind elements, and the smaller the effective protection length. Wind velocity downwind ofH. rhamnoidesincreased, with height increasing where the airflow decreases rate (R) decreased in the sublayer, and increasing in the middle layer as plant height increased. Meanwhile, the airflow decreases rate (R) was negative in the upper layer because it decreased as the plant height increased. The airflow movement between elements had various directions because the upper layer was prone to fluctuations due to the swinging of the crown and branches, and turbulence was seen at the sublayers owing to the mechanical resistance of the elements. When the wind speed at the standard point was 8.5 m/s and the wind direction was east (E), the increase of airflow velocity at the side and center in the upper layer was more significant, and there was a strong wind zone in the azimuth of NW-N-NE-E-SE, while the S-SW-W azimuth zone was weaker. The sand-fixing shrubH. rhamnoideshad a significant windproof function, and the 1.5 m square interval density ofH. rhamnoideswas suitable for alpine desert control projects.
英文关键词	alpine semi-arid desert Hippophae rhamnoides wind flow airflow decreases rate effective protection length
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SSCI
WOS记录号	WOS:000542144200042
WOS关键词	WIND-SPEED ; VEGETATION ; SINGLE ; REVEGETATION ; PLANTS
WOS类目	Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319685
作者单位	1.Qinghai Univ, Qinghai Acad Agr Forestry Sci, State Key Lab Plateau Ecol & Agr, Xining 810016, Peoples R China; 2.East China Univ Technol, Sch Earth Sci, Nanchang 200237, Jiangxi, Peoples R China; 3.China Inst Water Resources & Hydropower Res, Dept Sediment Res, Beijing 100038, Peoples R China
推荐引用方式 GB/T 7714	Tian, Lihui,Wu, Wangyang,Zhang, Dengshan,et al. Airflow Field Around Hippophae rhamnoides in Alpine Semi-Arid Desert[J],2020,9(5).
APA	Tian, Lihui,Wu, Wangyang,Zhang, Dengshan,&Yu, Yang.(2020).Airflow Field Around Hippophae rhamnoides in Alpine Semi-Arid Desert.LAND,9(5).
MLA	Tian, Lihui,et al."Airflow Field Around Hippophae rhamnoides in Alpine Semi-Arid Desert".LAND 9.5(2020).