浙江省慈溪市宗汉街道城镇绿地生态网络构建

以浙江省慈溪市宗汉街道为试验区,应用地理理信息系统(GIS)技术和景观格局指数方法,分析试验区景观格局特征,结合景观中心度指标节点度和紧密度,确定了城镇区核心绿地斑块,并划分为中心节点、关键节点及基本节点3种类型。运用生态适宜性分析方法和最小费用距离模型,构建了城镇区绿地系统潜在的生态廊道。结果表明:城镇区有53个绿地斑块,构成了城镇区绿地生态网络节点的核心;规划的14条潜在生态廊道能很好地结合绿地资源分布特点,连通城镇区核心绿地斑块,构建城镇区生态绿地网络系统。通过综合运用景观格局指数、最小费用距离模型、景观中心度评价等方法,可以定量地评价城镇绿地系统现状,优化城镇生态绿地网络,为城镇绿地生态网络规划与管理提供科学的参考依据。图5表3参17

Construction of town green land ecological networks of Zonghan sub-district in Cixi City

Taking Zonghan sub-district in Cixi City as a case study and applying GIS technology and landscape pattern index，this paper analyzed the characteristics of the landscape pattern in the study area. Based on the evaluation of landscape centrality index such as degree and closeness centrality，the research identified the town core green patches which were classified as three types，namely central，key and primary. Further，the ecological suitability analysis and the least-cost path model were utilized to establish the potential ecological corridors of the town green land system. Results showed that there were a total of 53 green patches which composed the core area of ecological network in town green land. A number of 14 potential ecological corridors were planned to connect the distribution of green land resources and the town core green patches in order to construct the town ecological green network system. The comprehensive methods supported by landscape pattern metrics，least-cost path model，and landscape centrality could be useful to evaluate the existing town green land system，optimize town ecological green network and supply the scientific basis for ecological network planning and management in town green land system. ［Ch，5 fig. 3 tab. 17 ref.］