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基于DEM的地形与优势树种(组)关联分析
肖文杰,唐雪海,黄庆丰,吴平,朱丹青
0
(安徽农业大学林学与园林学院,合肥 230036)
摘要:
以ArcGIS、Geoway等软件为数据平台,以SPOT5遥感影像为数据源,对安徽省休宁县岭南林场5幅1:10000地形图进行等高线地形数据和林地小班矢量化,建立数字高程模型(DEM)和优势树种(组)专题图层,进行地形分析及地形与优势树种(组)关联分析。结果表明,岭南林场海拔主要在300~800 m范围内,坡度主要是陡坡和急坡,坡向面积最大的是南坡。林场总体造林作业难度较大,生态脆弱性等级较高;森林资源主要集中在300~800 m的区域内,天然黄山松林、栎类林主要分布在800 m以上,硬阔天然林主要分布在800 m以下;松类和栎类主要分布在25°以上的坡度范围内,天然枫香林主要分布在陡坡和急坡;松类集中分布在阳坡和半阳坡,天然硬阔、栎类、枫香林主要分布在阴坡和半阴坡。
关键词:  数字高程模型(DEM)  地形分析  优势树种(组)  关联分析  岭南林场
DOI:10.13610/j.cnki.1672-352x.20141225.022
投稿时间:2014-03-28
基金项目:国家自然科学基金(31070569)资助。
Correlation analysis between topography and dominate?tree?species (group) based on DEM
XIAO Wenjie,TANG Xuehai,HUANG Qingfeng,WU Ping,ZHU Danqing
(School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036)
Abstract:
Using ArcGIS and Geoway softwares as the data collecting and processing platforms and the SPOT5 remote sensing images as the data source, the digital elevation model (DEM) and dominate?tree?species (group) maps were built based on the vectorization data of the contour terrain and the sub-compartment boundary from five topographic maps (1:10000) of Lingnan forest-farm in Xiuning of Anhui province to analyze the terrain and its correlation with dominate?tree?species?(group). The results showed: the overall elevation of Lingnan forest-farm is mainly in the range of 300-800 meters. Most of slopes are steep or urgent slopes. The area of southern slopes is the largest among nine slope-aspects. The afforestation operation of the forest-farm is difficult and the ecological fragility level is relatively high. The forest resources are mainly distributed within the altitude of 300-800 meters. Natural Pinus taiwanensis?and?Quercus?forests are mainly distributed above 800 meters altitude. Natural hard broadleaved forests are mainly distributed below 800 meters altitude. Conifer and Quercus forests are mainly distributed in the area with > 25 degrees of slope. Natural Liquidambar formosana forests are mainly distributed in the steep and urgent slopes. Most pine forests are distributed over the sunny and half sunny slopes. Natural hard broad-leaved, Quercus, and Liquidambar formosana forests are mainly distributed over the shade and half-shade slopes.
Key words:  digital elevation model (DEM)  terrain analysis  dominate?tree?species?(group)  correlation analysis  Lingnan forest-farm

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