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利用RS和GIS的空间分析技术,结合4个时期的Landsat TM遥感影像,对比分析了合肥市1989年、1995年、2003年和2007年城市森林景观格局变化过程和特征。结果表明,城市森林面积由1989年的5 532.66hm2下降到2003年的4 218.12 hm2,2003年后城市森林面积虽有所增加,但还没有恢复到1989年的水平。城市森林斑块数和斑块密度增加,斑块形状指数和斑块边界密度变大,表明斑块的形状更加不规则,趋于复杂。18年间城市森林景观破碎度增大,聚集度指数减小,说明景观类型分布趋于分散,受人为干扰影响较大。今后的城市森林建设应结合城市改造在中心城区适当增加城市森林斑块,尽量增加城市森林面积。
By using the spatial analysis technology of RS and GIS, and combining Landsat TM remote sensing image in four periods, the changing process and characteristics of urban forest landscape pattern in Hefei in 1989, 1995, 2003 and 2007 are compared and analyzed. The results showed that the urban forest area decreased from 5 532.66 hm2 in 1989 to 4 218.12 hm2 in 2003, and the number of urban private forests increased in 2003 but has not yet returned to 1989 levels. Urban forest plaque number and plaque density increased, plaque shape index and plaque border density, indicating that the plaque shape more irregular, tends to be complex. In 18 years, urban forest landscape fragmentation increased, aggregation index decreased, indicating the distribution of landscape types tend to be dispersed, greatly affected by human interference. Future urban forest construction should be combined with urban renewal in the central city proper to increase the urban forest patches, try to increase the urban forest area.