基于区域差异化视角的资源型城市绿色基础设施网络构建与优化——以大庆市主城区为例

Construction and Optimization of Green Infrastructure Network in Resource-based Cities Based on the Perspective of Regional Differentiation:A Case Study of the Main Urban Area in Daqing,China

科学识别生态源地、合理构建绿色基础设施(GI)网络是维持生态系统稳定、促进资源型城市绿色转型的重要措施。基于区域差异化视角,以大庆市主城区为例,通过景观指数法与风险"源(source)-汇(sink)"法的协同使用,识别出大同区、红岗区、龙凤区、让胡路区和萨尔图区的区域生态源地。基于多层级网络构建原则,使用最小成本路径(LCP)方法生成城市生态廊道,整合多级廊道的空间结构,优化大庆市主城区的GI网络布局。结果表明,区域差异化源地筛选耦合多层级网络构建的研究思路契合了地方性研究的特殊性,有效改善了资源型城市各区之间源地分布不均、网络结构偏倚的传统布局,优化了区域尺度下生态源地的连通性及城市生态空间保护的可持续性。

The scientific identification of ecological sources and reasonable construction of green infrastructure(GI)networks are important measures to maintain the stability of the ecosystem and promote the green transformation of resource-based cities.Based on the perspective of regional differentiation,taking the main urban area of Daqing as an example,through the collaborative use of the landscape index method and the risk"source-sink"method,the regional ecological sources of Datong District,Honggang District,Longfeng District,Ranghuru District,and Saertu District are identified.Based on the principle of multi-level network construction,the least-cost path(LCP)method is used to generate urban ecological corridors,integrate the spatial structure of multilevel corridors,and optimize the GI network layout of the main urban area of Daqing.The results show that the combined use of the regionally differentiated source selection method and the multi-level network construction method fits the peculiarities of local research and improves the traditional layout of uneven source distribution and network structure bias among the various districts of resourcebased cities,and makes up for the connectivity of ecological sources at the regional scale and the sustainability of urban ecological space protection.