文献类型：期刊文献

中文题名：林带冬季相疏透度与透风系数的换算

英文题名：Conversion of Porosity and Permeability of Shelter Belts with Winter Facies

作者：任昱[1] 王志刚[2] 杨东慧[3]

第一作者：任昱

机构：[1]中国林业科学研究院荒漠化研究所;[2]中国林业科学研究院沙漠林业实验中心;[3]包钢第一中学

年份：2013

卷号：49

期号：11

起止页码：83-88

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金："十二五"科技支撑项目"荒漠化综合治理与修复技术研究与示范"(2012BAD16B01);国家科技计划专题"干旱区沙漠边缘防风固沙体系构建技术研究与示范"(2012BAD16B103)

语种：中文

中文关键词：冬季相;疏透度;透风系数

外文关键词：winter facies ; porosity ; permeability

分类号：S727.2

摘要：为得到较为准确的林带冬季相疏透度与透风系数换算公式,利用阻力形成的物理机制推导不同行数圆柱体栅栏的疏透度与透风系数近似换算公式,揭示不同行数林带防风效应物理机制的一致性和数值差异规律。结果表明,疏透度β相同的林带,行数越少透风系数α越小,防风效果越好。以几何相似程度接近为原则,给出林带冬季相透风系数α与疏透度β的近似换算关系:单行林带为α=β0.7,2行林带为α=β0.6,多行林带为α=β0.55,比忽略行数和季相的影响而采用宽高比近于1的林带实验模拟公式α=β0.4更符合实际,有助于准确理解和运用防风效应原理进行林带和林网的结构设计。
In order to get more accurate forest winter facies porosity and permeability conversion formula, the physical mechanism of the resistance formation was used to deduce an approximate conversion formula of cylindrical fence porosity and permeability with different rows of trees, for revealing the consistency and the numerical variation rule of windbreak effect and the physical mechanism with different row numbers. The results showed that with the shelterbelt with the same porosity β, the less the row number, the smaller the permeability α, and the better the windbreak effect. With geometry similarity approaching as the principle, approximate conversion relationships between the forest winter phase permeability a, and porosity β were developed： single belt α=β^0.7, two belt α=β^0.6, for multiple belts α=β^0.55, which was more actual than the belt simulation formula α=β^0.4 which ignores rows and seasonal aspect effects, and assumes the ratio of length and height close to 1. The new relationships conduced to accurately understanding and applying windbreak effect principle and structure design of forest shelter belts.