文献类型：期刊文献

中文题名：林带冬季相结构参数及透风系数的算法推导

英文题名：Algorithm Derivation of Winter Facies Wind Protection of Shelterbelts Structural Parameters and Wind Permeability Coefficient

作者：王志刚[1] 任昱[1]

第一作者：王志刚

机构：[1]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200

年份：2012

卷号：25

期号：1

起止页码：36-41

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：农田防护林;疏透度;立木疏透度;表面积密度;体积密度;透风系数

外文关键词：farmland shelterbelts; porosity; stumpage porosity; surface density; bulk density; wind permeability coefficient

分类号：S727.2

摘要：从林带结构参数——疏透度β、立木表面积疏透度S'、立木体积疏透度V'、地上生物表面积密度C、地上生物体积密度W的定义和运算关系出发,推演出冬季相林带结构参数之间、以及它们与林带透风系数α、林带宽度D、枝条平均直径d的相互关系,其表达式为:W=V'/D=1/4dC=dS'/4D=-πdlnβ/4D=-0.1πdlnα/D该式是对几个主要结构参数之间具有同质性的证明,说明不同结构参数概念具有本质上的继承性和一致性,不存在严格意义上的排他性,在一定条件下是可以换算的,为林带防风效应评价运算提供了方便。导出一组适合我国北方干旱风沙区农田防护林带防风效应评价的运算公式。
To solve the problem in the absence of permeability algorithm in China＇s forestry industry standard ＂Technical Specification for Oasis Shelter Belt Construction（LY/T 1682—2006）＂,by defining and calculating the forest structural parameters-porosity β,stumpage surface porosity S′,stumpage volume porosity V′,aboveground surface area density C,aboveground bulk density W,the relations among these structural parameters and their relations with wind permeability coefficient α,shelterbelt width D and mean diameter of branch d were calculated,which is expressed as： W=V′/ D=1 /4dC=dS′/4D=-πdlnβ/4D=-0.1πdlnα/D It is proofed that the main structural parameters have homogeneity and different structural parameters are of inheritance and consistency on the nature,there is no exclusivity in the strict sense,and is convertible under certain conditions,which is convenient for evaluating the wind-resistance effect of shelterbelt.A set of computational formulas for wind effect evaluation of farmland shelterbelt in dry and sandy area in northern China is derived.