干旱区生态环境知识资源中心(Arid): Effects of sand-fixing and windbreak forests on wind flow: a synthesis of results from field experiments and numerical simulations

Arid

	Effects of sand-fixing and windbreak forests on wind flow: a synthesis of results from field experiments and numerical simulations
	Zhan Kejie; Liu Shizeng; Yang Zihui; Fang Etian; Zhou Lanping; Huang Ning
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2017
卷号	9 期号:1 页码:1-12
英文摘要	Sand-fixing and windbreak forests are widely used to protect or/and improve the ecological environments in arid and semi-arid regions. A full understanding of wind flow characteristics is essential to arranging the patterns of these protective forests for enhancing the effectiveness. In this study, the wind velocity over the underlying surface with sand-fixing forests and windbreak forests at the heights of 1-49 m was monitored from two 50-m high observation towers in an oasis of Minqin, Gansu Province of China. The wind velocities were simulated at different locations over these protective forests between those two towers by a two-dimensional Computational Fluid Dynamics (CFD) model. The results showed that at the heights of 1-49 m, the wind velocity profiles followed a classical logarithm law at the edge of the oasis and a multilayer structure inside the oasis. With increasing number of sand-fixing forest and windbreak forest arrays, the wind velocity at the heights of 1-49 m generally decreased along the downstream direction of the prevailing wind. Specifically, below the height of windbreak forests, the wind velocity decelerates as the airflow approaches to the windbreak forests and then accelerates as the airflow passes over the windbreak forests. In contrast, above the height of windbreak forests, the wind velocity accelerates as the airflow approaches to the windbreak forests and then generally decelerates as the airflow passes over the windbreak forests. Both the array number and array spacing of sand-fixing and windbreak forests could influence the wind velocity. The wind protection effects of sand-fixing forests were closely related to the array spacing of windbreak forests and increased with the addition of sand-fixing forests when the array of the forests was adequately spaced. However, if the array spacing of windbreak forests was smaller than seven times of the heights of windbreak forests, the effects were reduced or completely masked by the effects of windbreak forests. The results could offer theoretical guidelines on how to systematically arrange the patterns of sand-fixing and windbreak forests for preventing wind erosion in the most convenient and the cheapest ways.
英文关键词	wind velocity sand-fixing forest windbreak forest computational simulation Minqin
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:5905886
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335745
作者单位	Zhan Kejie, Department of Mechanics, Lanzhou University, Key Laboratory of Mechanics on Western Disaster and Environment in China (Ministry of Education), Lanzhou, Gansu 730000, China.; Huang Ning, Department of Mechanics, Lanzhou University, Key Laboratory of Mechanics on Western Disaster and Environment in China (Ministry of Education), Lanzhou, Gansu 730000, China.; Liu Shizeng, Minqin National Station for Desert Steppe Ecosystem Studies, Minqin, 733000.; Yang Zihui, Minqin National Station for Desert Steppe Ecosystem Studies, Minqin, 733000.; Fang Etian, Minqin National Station for Desert Steppe Ecosystem Studies, Minqin, 733000.; Zhou Lanping, Minqin National Station for Desert Steppe Ecosystem Studies, Minqin, 733000.
推荐引用方式 GB/T 7714	Zhan Kejie,Liu Shizeng,Yang Zihui,et al. Effects of sand-fixing and windbreak forests on wind flow: a synthesis of results from field experiments and numerical simulations[J],2017,9(1):1-12.
APA	Zhan Kejie,Liu Shizeng,Yang Zihui,Fang Etian,Zhou Lanping,&Huang Ning.(2017).Effects of sand-fixing and windbreak forests on wind flow: a synthesis of results from field experiments and numerical simulations.Journal of Arid Land,9(1),1-12.
MLA	Zhan Kejie,et al."Effects of sand-fixing and windbreak forests on wind flow: a synthesis of results from field experiments and numerical simulations".Journal of Arid Land 9.1(2017):1-12.