干旱区生态环境知识资源中心(Arid): 绿洲林网区上层动力速度与防风效应估算

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	绿洲林网区上层动力速度与防风效应估算
其他题名	Estimates of the Wind Protection Effect and the Relative Dynamic Speed above the Canopy of A Large Oasis Area
	赵英铭 1; 辛智鸣 1; 王志刚 1; 马学献 2; 吴立伟 3
来源期刊	林业科学
ISSN	1001-7488
出版年	2013
卷号	49 期号:10 页码:93-99
中文摘要	为准确评估大范围绿洲防护林对上层气流动力速度的影响,利用动力平衡法推导上层气流相对动力速度的公式,并在4个不同结构网格进行实测估算,同时利用磴口荒漠生态定位站50 m通量塔风速数据拟合估算,得到4,5月大风时段防护林健全的绿洲区内部上层相对动力速度v’约为1.3。分析绿洲防护林边缘区和内部上层动力速度变化的力学机制、防护林树高以下动力速度的构成因素,给出绿洲区地面阻力评价的方法,并以贴地层相对风速gamma为目标参数构建大范围绿洲区防风效应评价的近似计算公式gamma=v’alpha2l/[2alpha~2l+(1-alpha~2)A~2。阐述透风系数alpha、以树高倍数表示的林带间距l、树高的对数积分特征值A与林网区整体防风效应的关系。
英文摘要	The dynamic balance method was used to deduce the relative power formula of the upper air flow to accurately assess the impact of a wide range of oasis protection forest on the upper air power speed. Based on the measurement at four different geometric structure grids, and the fitting estimates with the wind speed data collected from a 50 m flux tower at the Dengkou Desert Ecological Research Station, it was found the upper relative power speed during April and May gale periods within the oasis region was about 1.3. The following formula was built to estimate the ground layer relative wind speed (gamma) and further to evaluate the effects of a wide range of oasis area on wind protection: gamma=v’_*alpha2l/[2alpha~2l+(1-alpha~2)A~2.This formula, based on the analysis of mechanisms of oasis protection forest edge zone and the upper power speed change, and constituent elements of power speed under shelterbelt trees, provided a ground resistance evaluation method of oasis area. This formula could also illustrate the relationship between wind penetration coefficient (alpha), forest space (l, which is the multiple of tree height), ratio of average wind speed and power speed below tree height in the control areas (A), and wind protection effect of the whole shelterbelts.
中文关键词	农田防护林 ; 相对风速 ; 透风系数 ; 林带间距 ; 动力速度
英文关键词	farmland shelterbelts relative wind speed permeability of windbreaks distance between main belts power speed
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:4982061
来源机构	中国林业科学研究院沙漠林业实验中心
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229845
作者单位	1.中国林业科学研究院沙漠林业实验中心, 磴口, 内蒙古 015200, 中国; 2.磴口县林业局, 磴口, 内蒙古 015200, 中国; 3.银川市园林局, 银川, 宁夏 750000, 中国
推荐引用方式 GB/T 7714	赵英铭,辛智鸣,王志刚,等. 绿洲林网区上层动力速度与防风效应估算[J]. 中国林业科学研究院沙漠林业实验中心,2013,49(10):93-99.
APA	赵英铭,辛智鸣,王志刚,马学献,&吴立伟.(2013).绿洲林网区上层动力速度与防风效应估算.林业科学,49(10),93-99.
MLA	赵英铭,et al."绿洲林网区上层动力速度与防风效应估算".林业科学 49.10(2013):93-99.