小尺度森林郁闭度测定方法及应用  

A method for estimating small-scale forest crown closure and its application

作　　者：任德智[1,2] 葛立雯 罗大庆[1,2] 

机构地区：[1]西藏农牧学院高原生态研究所,西藏林芝860000 [2]西藏林芝森林生态系统定位研究站 [3]毕节市农业科学研究所

出　　处：《林业科技开发》2014年第1期94-97,共4页China Forestry Science and Technology

基　　金：国家自然基金项目(编号:31060113);西藏自治区科技厅"基于多源遥感影像及BP神经网络模型的色季拉山区鲁朗河流域森林动态变化分析"项目

摘　　要：郁闭度作为反映树冠闭锁程度、树木利用生活空间程度、森林结构及森林生长状况、生长环境等的重要因子之一。郁闭度的快速、准确测定一直以来都是学者们探讨的热点,但是,目前的郁闭度测定方法大多在工作量、精度与成本间无法兼顾。因此,提出一种基于地理信息系统(GIS)缓冲区分析功能进行郁闭度定量求算方法(简称"缓冲区法"),通过与树冠投影法实测的郁闭度特征进行方差分析,结果表明,缓冲区法与树冠投影法实测的郁闭度和树冠垂直投影图形状之间均无显著差异。Canopy closure helps predict volume, stand density, crown width and crown competition factors of the forest stands. Accurate estimation of canopy closure has been also becoming increasingly important in forest management, which is costly and labor-intensive. A new method to estimate canopy closure by using the buffer analysis of Geographic Informa- tion System （GIS） was proposed in this paper, and the estimation performance comparison between the buffer analysis method and the conventional projection area method was also made. The results showed that there was no statistically signif- icant difference between the buffer method and the projected area method.

关 键 词：郁闭度 缓冲区法 GIS 

分 类 号：S771.8[农业科学—森林工程]