OALib Journal期刊
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基于景观连通性的城市绿地核心区规划方法研究
DOI: 10.3969/j.jssn.1000-2006.2011.01.012, PP. 51-56
Keywords: 城市绿地,连通性,重要值,核心区,景观指数,扬州
Abstract:
城市绿地作为城市生态系统的重要组成部分,对城市发展的贡献不可估量。以扬州市为例,在arcgis9.2支持下,借助于2005年spot5遥感影像数据,引入景观巧合概率指数(lcp)、整体连通性指数(iic)、可能连通性指数(pc)和重要值等评价指数,对研究区内的绿地斑块等级、连通性和空间结构进行分析。结果表明:当连通距离设置为500m时,lcp、iic和pc所反映的斑块重要性排列顺序基本一致;以500m阈值确定2km2绿地核心区内,绿地斑块数和面积分别占总体的8%和16%;核心区内的绿地斑块主要以中大型和大型斑块为主,斑块连接度高,破碎化程度较低。因此,控制核心区用地规模,加强核心区内的植物保护与建设,通过构建以核心区为重要节点的绿地网络是增加扬州城市绿地系统生态效益的关键。
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