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Effects of species and shelterbelt structure on wind speed reduction in shelter

Citation

Van Thuyet, D and Van Do, T and Sato, T and Thai Hung, T, Effects of species and shelterbelt structure on wind speed reduction in shelter, Agroforestry Systems, 88, (2) pp. 237-244. ISSN 0167-4366 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Springer Science+Business Media

DOI: doi:10.1007/s10457-013-9671-4

Abstract

Live shelterbelts are common elements in coastal land areas and play an important role in reducing wind speed and sand drift. A simple measured index, that well represents relationship between shelterbelt structure and wind speed reduction, is required by landowners to enable them in establishing more effective shelterbelts. A three-dimensional crown (3D) density is proposed, which can be easily identified through shelterbelt parameters including maximum height, shelterbelt width, vertical crown/stem area ratio, and horizontal crown/stem area ratio. The utility of the index was tested in 10-year-old Casuarina equisetifolia and in 7-year-old Acacia auriculiformis shelterbelts in north central Coast of Vietnam. There was a significant negative linear relationship (R2 = 0.64, p < 0.001) between 3D density and wind speed reduction efficiency, while there was no relationship between a two-dimensional crown density and wind speed reduction efficiency. Reduction efficiency was found to increase at higher wind speeds in shelterbelts of A. auriculiformis, but not C. equisetifolia. The A. auriculiformis shelterbelt was more efficient in reducing wind speed compared to C. equisetifolia shelterbelt. The former recovered 70 % wind speed at 130 m (16.5H) leeward, while it recovered 70 % at 85 m (8H) leeward in C. equisetifolia shelterbelt.

Item Details

Item Type:Refereed Article
Keywords:horizontal structure, relative wind speed reduction, shelterbelt, three-dimensional crown density, vertical structure
Research Division:Environmental Sciences
Research Group:Environmental Science and Management
Research Field:Environmental Management
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Thai Hung, T (Mr Hung Trieu Thai)
ID Code:98538
Year Published:2014
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-02-18
Last Modified:2015-04-27
Downloads:0

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