基于图论法对城市水系连通性表征及优化  

Layout and Optimization of Urban Water System Connectivity Based on the Graph Theory

作　　者：傅春[1,2] 邓俊鹏 欧阳欢蕤 付耀宗 张静[1] Fu Chun;Deng Junpeng;Ouyang Huanrui;Fu Yaozong;Zhang Jing(Schcol of Public Policy and Administration,Nanchang University,Nanchang 330031,Jiangxi,China;School of Economics and Management,Nanchang University,Nanchang 330031,Jiangxi,China;School of lnfrastructure Engineening,Nanchang University,Nanchang 330031,Jiangxi,China;Fuzhou Emergency Rescue Support Center,Fuzhou 344100,Jiangxi,China)

机构地区：[1]南昌大学公共政策与管理学院,江西南昌330031 [2]南昌大学区域经济研究院,江西南昌330031 [3]南昌大学工程建设学院,江西南昌330031 [4]抚州市应急救援保障中心,江西抚州344100 [5]南昌大学经济管理学院,江西南昌330031

出　　处：《地理科学》2022年第11期2028-2038,共11页Scientia Geographica Sinica

基　　金：国家社会科学基金项目(18BGL187)资助。

摘　　要：基于景观生态学中“点–边”数量关系建立水系环度(α)、节点连接率(β)和网络连通度(γ)3种水系连通性评价指标,绘制出南昌市水系“节点–廊道”有向图,并以城市湖水体引流化污为切入点来优化城市水系连通性。研究表明:(1)南昌市城区水系存在廊道空间分布不均匀,湖节点与其他水系节点连接的廊道较少等问题;(2)优化后的城区水系相较于现在水系,其中水系环度(α)提高75%,节点连接率(β)提高14.88%,网络连接度(γ)提高14.63%。在城市水系连通性优化中,不应过分追求连通性而盲目增加湖泊廊道,应在连通性与湖泊连接的廊道数量之间保持一个平衡关系,以免水体污染物在湖泊中淤积。Urban expansion has cut off the originally connected rivers and lakes, and repairing the connectivity of the water systems in urban areas is an important part of the construction of sponge cities and water ecological civilization cities. Based on the ‘point-edge’ quantitative relationship in landscape ecology, three water system connectivity evaluation indicators(α), node connection rate(β) and network connectivity(γ) are established, and the ‘node-corridor’of the water system in Nanchang is drawn. ‘Tao’ has a directed map and uses urban lake water drainage and pollution as the starting point to optimize the connectivity of the urban water system. Studies have shown that: 1) The urban water system of Nanchang has uneven distribution of corridors, and there are fewer corridors connecting the lake node with other water system nodes;2) The optimized urban water system is compared with the current water system. The degree(α) is increased by 75%, the node connection rate(β) is increased by 14.88%, and the network connection degree(γ) is increased by 14.63%. In the optimization of urban water system connectivity, we should not blindly increase lake corridors by pursuing connectivity too much. We should maintain a balance between connectivity and the number of corridors connected to the lake to prevent water pollutants from silting up in the lake.

关 键 词：图论法 水系连通 MIKE21 引流化污 南昌市 

分 类 号：TV122[水利工程—水文学及水资源]