城市生态网络构建及空间优化策略研究

Research on the Construction of Urban Ecological Network and Its Space Optimization Strategy

文章以合肥中心城区为例,从景观形状、邻近度、多样性、聚散性4个层面构建景观格局评价指标体系,再将“斑块—廊道”系统与现状土地利用图叠加分析,判断生态断裂带和断裂点的空间分布。结果表明:生态斑块50m和300m阈值下景观格局综合指数较高,分别为9.85、9.84,建议增加斑块50m核心保护区及300m生态缓冲区,并提出强化廊道连通性、修复生态断裂带(点)等生态网络空间优化策略。为城市生态网络优化及修复提供新的理论与方法。

Taking Hefei central city as an example,the landscape pattern evaluation index system is constructed from four aspects,including landscape shape,proximity,diversity and dispersion indicators.Finally,the "patch-corridor"system is superimposed with the current land use map to find out the spatial distribution of ecological fault zones and ecological fault points.The results show that the landscape pattern index at the threshold of 50 m and 300 m is higher,which is 9.85 and 9.84 respectively.It is suggested to increase the 50 m core protection area and the 300 m ecological buffer zone of the ecological patch.The ecological network space optimization strategies,such as strengthening corridor connectivity and repairing ecological fault zones(points),are proposed,which provide new theories and methods for the optimization and restorationofurban ecological network.