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以遥感影像为基础数据源,通过面向对象的影像分析软件Ecognition和ArcGIS软件,解译提取昌化江流域1995年、2000年和2007年天然林信息,以Fragstats景观格局分析软件为景观指数计算工具,选择景观斑块形状指数、景观斑块数量破碎化指数、景观斑块分维数指数等指标,对昌化江流域天然林空间格局的动态变化进行研究。结果表明:1995年、2000年和2007年昌化江流域天然林总面积分别为1 431.38 km2,2 143.17 km2和1 487.98km2,天然林景观空间格局发生了波浪形变化,目前天然林破坏严重。分析结果为天然林的保护与恢复提供了科学依据。
Using remote sensing image as the data source, the object-oriented image analysis software Ecognition and ArcGIS software were used to extract and extract natural forest information of 1995, 2000 and 2007 in Changhua River basin. Fragstats landscape pattern analysis software was used to calculate landscape index , The index of landscape patch shape index, landscape fragmentation index and landscape fractal dimension index were selected to study the dynamic changes of spatial pattern of natural forest in Changhuajiang River Basin. The results showed that the total area of natural forests in Changhua River Basin in 1995, 2000 and 2007 was 1 431.38 km2, 2 143.17 km2 and 1 487.98 km2, respectively. The spatial pattern of natural forest landscape changed in a wavy pattern. At present, the natural forest is seriously damaged. The results provide a scientific basis for the protection and restoration of natural forests.