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多边形草沙障防风效果研究

孙浩 刘晋浩 黄青青 赵可

孙浩, 刘晋浩, 黄青青, 赵可. 多边形草沙障防风效果研究[J]. 北京林业大学学报, 2017, 39(10): 90-94. doi: 10.13332/j.1000-1522.20170173
引用本文: 孙浩, 刘晋浩, 黄青青, 赵可. 多边形草沙障防风效果研究[J]. 北京林业大学学报, 2017, 39(10): 90-94. doi: 10.13332/j.1000-1522.20170173
SUN Hao, LIU Jin-hao, HUANG Qing-qing, ZHAO Ke. Research on the windproof efficiency of polygonal straw sand barrier[J]. Journal of Beijing Forestry University, 2017, 39(10): 90-94. doi: 10.13332/j.1000-1522.20170173
Citation: SUN Hao, LIU Jin-hao, HUANG Qing-qing, ZHAO Ke. Research on the windproof efficiency of polygonal straw sand barrier[J]. Journal of Beijing Forestry University, 2017, 39(10): 90-94. doi: 10.13332/j.1000-1522.20170173

多边形草沙障防风效果研究

doi: 10.13332/j.1000-1522.20170173
基金项目: 

林业公益性行业科研专项 201504508

“十二五”国家科技支撑计划项目 2015BAD07B00

详细信息
    作者简介:

    孙浩,博士生。主要研究方向:环境流体力学、风沙物理。Email:251045257@qq.com  地址:100083 北京市海淀区清华东路35号北京林业大学工学院

    责任作者:

    刘晋浩,教授,博士生导师。主要研究方向:林业装备自动化及智能化。Email:liujinhao@vip.163.com  地址:同上

  • 中图分类号: S775

Research on the windproof efficiency of polygonal straw sand barrier

  • 摘要: 为了解正三角形、正方形和正六边形格状草沙障的防风固沙能力,通过测定沙障样地内不同高度风速,针对单个网格面积为1 m2的3种沙障,对沙障的防风效能、风速廓线特征和地表粗糙度进行研究。结果表明,正三角形和正六边形沙障的防风效能显著大于正方形沙障。高度为0.2 m时,正方形沙障的防风效能比三角形和六边形沙障分别低12%和8%,高度为0.3 m时,分别低11%和10%。0.2~0.3 m高度范围内,三角形沙障和六边形沙障的防风效能差异不显著。风速小于6 m/s时,地表粗糙度随风速变化接近线性变化规律。裸露地表 1 m高处,风速为4 m/s时,裸露地表粗糙度为0.166 cm,三角形沙障、正方形沙障和六边形沙障的地表粗糙度分别为11.5、9.3和10.4 cm,分别为裸露地表粗糙度的69.3、56和62.7倍。三角形沙障的地表粗糙度比正方形沙障和六边形沙障的地表粗糙度分别高23.7%和10.5%。铺设三角形沙障的地表粗糙度最大。

     

  • 图  1  多边形沙障铺设效果

    Figure  1.  Laying effects of polygon straw sand barrier

    图  2  草沙障监测点布置

    Figure  2.  Arrangement plan of monitoring site for straw sand barrier

    图  3  多边形沙障风速廓线对比

    Figure  3.  Comparison in wind speed profile among polygonal sand barrier types

    图  4  多边形沙障地表粗糙度对比

    Figure  4.  Comparison in roughness among polygonal sand barrier types

    表  1  多边形沙障防风效益对比

    Table  1.   Comparison in windproof efficiency among polygon sand barrier types

    %
    测量高度
    Measuring height/m
    沙障类型Sand barrier type
    三角形
    Triangular
    正方形
    Square
    六边形
    Hexagonal
    0.2 67±16a 55±15b 63±13c
    0.3 46±13a 35±16b 45±12a
    0.5 25±9a 16±11b 30±8c
    1 7±5a 7±3a 3±4b
    注:不同字母表示不同类型沙障防风效能差异显著(P < 0.05)。Note: different letters mean significant difference in windproof efficiency among three types of sand barrier at P<0.05 level.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-05-16
  • 修回日期:  2017-06-19
  • 刊出日期:  2017-10-01

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