绿洲林网区上层动力速度与防风效应估算

doi:10.11707/j.1001-7488.20131015

林业科学 ›› 2013, Vol. 49 ›› Issue (10): 93-99.doi: 10.11707/j.1001-7488.20131015

绿洲林网区上层动力速度与防风效应估算

赵英铭¹, 辛智鸣¹, 王志刚¹, 马学献², 吴立伟³

1. 中国林业科学研究院沙漠林业实验中心磴口 015200;
2. 磴口县林业局磴口 015200;
3. 银川市园林局银川 750000

收稿日期:2012-09-06 修回日期:2013-06-03 出版日期:2013-10-25 发布日期:2013-11-05
通讯作者: 王志刚
基金资助:
"十二五"国家科技支撑计划项目(2012BAD16B0103);"十一五"国家科技支撑计划重点项目(2006BAD26B0801)。

Estimates of the Wind Protection Effect and the Relative Dynamic Speed above the Canopy of A Large Oasis Area

Zhao Yingming¹, Xin Zhiming¹, Wang Zhigang¹, Ma Xuexian², Wu Liwei³

1. Experiment Center of Desert Forestry, CAF Dengkou 015200;
2. Dengkou Forestry Bureau Dengkou 015200;
3. Yinchuan Landscape Administration Bureau Yinchuan 750000

Received:2012-09-06 Revised:2013-06-03 Online:2013-10-25 Published:2013-11-05

摘要/Abstract

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γ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γ=v_*'α√2l/[2α²l+(1-α²)A²。阐述透风系数α、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。

关键词: 农田防护林, 相对风速, 透风系数, 林带间距, 动力速度

Abstract:

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 (γ) and further to evaluate the effects of a wide range of oasis area on wind protection: γ=v_*'α√2l/[2α²l+(1-α²)A².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 (α), 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.

Key words: farmland shelterbelts, relative wind speed, permeability of windbreaks, distance between main belts, power speed

中图分类号:

S727.2

赵英铭, 辛智鸣, 王志刚, 马学献, 吴立伟. 绿洲林网区上层动力速度与防风效应估算[J]. 林业科学, 2013, 49(10): 93-99.

Zhao Yingming, Xin Zhiming, Wang Zhigang, Ma Xuexian, Wu Liwei. Estimates of the Wind Protection Effect and the Relative Dynamic Speed above the Canopy of A Large Oasis Area[J]. Scientia Silvae Sinicae, 2013, 49(10): 93-99.

[1]	幸泽峰, 李颖, 邓荣鑫, 朱红雷, 付波霖. 基于ZY-3影像的农田防护林自动提取[J]. 林业科学, 2016, 52(4): 11-20.
[2]	王志刚, 辛智鸣, 赵英铭, 马学献, 陈峰, 乌拉, 肖彩虹. 我国绿洲防护林冬季相防风效应的估算[J]. 林业科学, 2014, 50(8): 90-96.
[3]	任昱, 王志刚, 杨东慧. 林带冬季相疏透度与透风系数的换算[J]. 林业科学, 2013, 49(11): 83-88.
[4]	杨斌杨国州张延东. 运用层次分析法优选临夏北塬农田防护林树种[J]. 林业科学, 2006, 42(06): 49-55.
[5]	朱廷曜关德新吴家兵金昌杰. 论林带防风效应结构参数及其应用[J]. 林业科学, 2004, 40(4): 9-14.
[6]	姜凤岐朱教君周新华. 林带连续性经济效益模型及其应用的研究[J]. , 1999, 35(1): 9-14.
[7]	朱教君姜凤歧曾其蕴. 杨树林带木材纤维长度变化规律及其在经营中的应用[J]. , 1994, 30(1): 50-56.
[8]	朱廷曜周广胜. 农牧防护林网区域性防风效应及评价模型[J]. , 1993, 29(6): 509-514.
[9]	高素华宋兆民高桥英纪. 林带的防风效能及数字模拟[J]. , 1991, 27(5): 550-554.
[10]	樊巍王广钦宋兆民. 农田防护林人工生态系统物质循环与能量流动研究[J]. , 1991, 27(4): 393-400.

绿洲林网区上层动力速度与防风效应估算

Estimates of the Wind Protection Effect and the Relative Dynamic Speed above the Canopy of A Large Oasis Area

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 10

编辑推荐

Metrics

本文评价

作者中心

期刊获奖

引证指标

联系方式