Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s40333-016-0058-z |
Effects of sand-fixing and windbreak forests on wind flow: a synthesis of results from field experiments and numerical simulations | |
Zhan Kejie1,2; Liu Shizeng2; Yang Zihui2; Fang Etian2; Zhou Lanping2; Huang Ning1 | |
通讯作者 | Huang Ning |
来源期刊 | JOURNAL OF ARID LAND |
ISSN | 1674-6767 |
EISSN | 2194-7783 |
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 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000396209800001 |
WOS关键词 | ATMOSPHERIC BOUNDARY-LAYER ; SHEAR-STRESS DISTRIBUTIONS ; SHRUB SHELTERBELTS ; TURBULENT-FLOW ; MODEL FOREST ; POROUS FENCE ; AIR-FLOW ; TUNNEL ; MICROCLIMATES ; VEGETATION |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/200152 |
作者单位 | 1.Lanzhou Univ, Dept Mech, Minist Educ, Key Lab Mech Western Disaster & Environm China, Lanzhou 730000, Peoples R China; 2.Minqin Natl Stn Desert Steppe Ecosyst Studies, Minqin 733000, Peoples R China |
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]. 兰州大学,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. |
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