干旱区生态环境知识资源中心(Arid): Numerical simulation of shelter effect assessment for single-row windbreaks on the periphery of oasis farmland

Arid

DOI	10.1016/j.jaridenv.2024.105165
	Numerical simulation of shelter effect assessment for single-row windbreaks on the periphery of oasis farmland
	He, Chenchen; Shao, Wenyan
通讯作者	He, CC
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2024
卷号	222
英文摘要	Dust storms, resulting from aeolian erosion, pose significant environmental hazards, while farmland is one of the main sources of dust storm release. An effective strategy to mitigate surface wind speed and curb dust emissions involves the establishment of windbreaks on the periphery of oasis farmland. This study conducts a series of numerical simulations using computational fluid dynamics (CFD) to explore the airflow fields around windbreaks with diverse systematic structural parameters, encompassing porosity, planting spacing, and fence effects. The main findings are as follows: (1) When the vegetation porosity is consistent (e.g., porosity alpha = 0.7, 0.8, and 0.9), exact geometry results can effectively reflect the distribution of wall shear stress, while the porous medium model overlooks these details. (2) The Venturi effect contributes to the acceleration of surface erosion and improper planting spacing results in an elevation of near -surface velocity. Planting spacing of 0.5 m demonstrates superior wind speed reduction performance, mitigating aeolian erosion and accumulation. (3) When the fence is positioned at l = 5 h ( h represents the height of the windbreaks), the flow field around the windbreaks is minimally influenced. The optimal placement distance for fences should be close to the windbreaks, featuring minimal porosity ( l = 0 h , alpha = 0.1), extending the shelter distance from 3 to 4 h to 5 - 6 h . The research results can provide a theoretical basis for optimizing the plant configuration of biological desertification control and soil erosion control measures.
英文关键词	Windbreaks Optical porosity Venturi effect Aeolian erosion Numerical simulation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001235498400001
WOS关键词	AIR-FLOW ; WIND-TUNNEL ; SEDIMENT TRANSPORT ; SPEED ; REDUCTION ; RECOVERY ; DYNAMICS ; POROSITY ; PLANTS ; LEE
WOS类目	Ecology ; Environmental Sciences
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/2XILL650/404347
推荐引用方式 GB/T 7714	He, Chenchen,Shao, Wenyan. Numerical simulation of shelter effect assessment for single-row windbreaks on the periphery of oasis farmland[J],2024,222.
APA	He, Chenchen,&Shao, Wenyan.(2024).Numerical simulation of shelter effect assessment for single-row windbreaks on the periphery of oasis farmland.JOURNAL OF ARID ENVIRONMENTS,222.
MLA	He, Chenchen,et al."Numerical simulation of shelter effect assessment for single-row windbreaks on the periphery of oasis farmland".JOURNAL OF ARID ENVIRONMENTS 222(2024).