摘要
本研究利用ArcGIS构建单株木的Voronoi多边形和Delaunay三角网,量化对象木邻近木株数n值,计算基于Voronoi多边形和Delaunay三角网的混交度、大小比数和角尺度。在开原市黄旗寨满族乡选择天然次生林设定样地作为研究对象,通过计算林分空间结构指数,得到林分平均混交度为0.44,属于弱度混交状态,林分混交程度较低;林分的平均大小比数为0.47,处于中庸状态;林分平均角尺度为0.55,呈团状分布。分析林分的空间结构状态,制定营林措施,以期逐步调整林分的结构达到最优水平。
This study uses ArcGIS to build every trees of Voronoi diagrams and Delaunay Triangulation,according to this structure to determineN value of the nearest neighbor trees of the object trees in the stand spatial structure unit,mingling of the stand spatial structure index calculated by this method,the size is smaller than the number and angular scales.Huang Qi village,Kaiyuan Manchu's Xiang set samples tested by calculating the indices of forest stand structure and get average mingling of stands is 0.44,weakly mixed state,average size is smaller than the number of stands was 0.47,is in a moderate State,average angular scales of stands is 0.55,showed mass distribution.By analyzing the spatial structure of the stands,forest management measures are formulated in order to gradually adjust the structure of the stands to achieve the optimal level.
作者
李元
LI Yuan(Liaoning Forestry Investigation,Planning and Monitoring Institute Shenyang,Liaoning 110122)
出处
《现代农业研究》
2023年第9期142-146,共5页
Modern Agriculture Research
基金
中央高校基本科研业务费项目“自然生态系统碳汇时空动态模拟及碳中和潜力预估”(项目编号:HFW220100054)。
关键词
VORONOI
空间结构
混交度
大小比数
角尺度
Voronoi
spatial structure
mingling index
neighborhood comparison
uniform angle index
