北京林业大学学报2017，Vol.39Issue(10)：90-94,5.DOI:10.13332/j.1000-1522.20170173
多边形草沙障防风效果研究
Research on the windproof efficiency of polygonal straw sand barrier
摘要
Abstract
To understand the windproof benefit of triangular sand barrier, square sand barrier and hexagonal sand barrier, we studied respectively the windproof efficiency, wind speed profile characteristics and roughness of ground surface of straw sand barrier, whose single mesh grid was 1 m2 by measuring the wind speeds in different heights in three straw sand barrier types. Results showed that wind speed efficiency could be reduced by triangular sand barrier and hexagonal sand barrier significantly than square sand barrier. The windproof efficiency of square sand barrier was 12％ and 8％ lower than triangular sand barrier and hexagonal sand barrier respectively at 0. 2 m height, and was 11％ and 10％ lower than triangular sand barrier and hexagonal sand barrier respectively at 0. 3 m height. The difference of windproof efficiency in triangular and hexagonal sand barrier was not obvious at he height between 0. 2-0. 3 m. The variation of roughness with wind speed was linear when the wind speed was less than 6 m/s. When wind speed was 4 m/s at 1 m height above bare sand, the roughness of bare sand was 0. 166 cm, and the roughness of triangular sand barrier, square sand barrier and hexagonal sand barrier was 11. 5, 9. 3 and 10. 4 cm, respectively, and was 69. 3, 56 and 62. 7 times of bare sand. The roughness of triangular sand barrier was 23. 7％ and 10. 5％ higher than that of square sand barrier and hexagonal sand barrier, respectively. Consequently, the roughness of triangular straw sand barrier is the highest.关键词
草沙障/防风效能/粗糙度/风速廓线Key words
straw sand barrier/windproof efficiency/roughness/wind speed profile分类
农业科技引用本文复制引用
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):90-94,5.基金项目
"十二五"国家科技支撑计划项目(2015BAD07B00)、林业公益性行业科研专项(201504508). （2015BAD07B00）
