摘要
【目的】建立合理的城市热环境生态网络,以缓解城市热岛效应。【方法】以成都市中心城区为研究对象,基于“源-汇”理论,利用形态学空间格局分析方法(MSPA)与景观连通性指数,分别筛选研究区内景观稳定性好、连通性高的“源”“汇”景观作为生态源地;运用最小累积阻力模型、重力模型以及水文分析模块构建和筛选研究区内的重要生态廊道,从而建立缓解城市热环境问题的多层级“源-汇”景观网络。【结果】分别筛选出24个具有重要连通性的“源”“汇”核心斑块作为重要生态源地。构建“源-源”廊道102条,“汇-汇”廊道141条,“源-汇”廊道325条,生态节点103个,障碍点148个。通过综合相交分析,一级补偿廊道主要由岷江、毗河和其他河道构成,二级输送廊道主要分布在“汇”景观较为密集的区域,三级作用廊道主要分布在高强度建设区域。【结论】基于“源-汇”理论构建的多层级生态网络优化格局是有效缓解城市热岛效应的重要举措。图4表3参25.
[Objective]The acceleration of urbanization leads to the change of urban underlying surface,serious landscape fragmentation,and continuous intensification of urban heat island effect,especially in the urban center where buildings and populations are highly clustered.The establishment of reasonable ecological network has become one of the important ways to improve the urban ecological environment.[Method]Based on the“source-sink”theory,this study used morphological spatial pattern analysis(MSPA)and landscape connectivity index to select the“source”and“sink”landscapes with good landscape stability and high connectivity as ecological sources in the study area.The minimum cumulative resistance model,gravity model and hydrological analysis module were used to construct and screen important ecological corridors in the study area,so as to establish a multi-level“source-sink”landscape network to alleviate urban thermal environment problems.[Result]The results showed that 24 core patches with important connectivity were selected as important ecological sources.There were 102“source-source”corridors,141“source-sink”corridors,325“source-sink”corridors,103 ecological nodes and 148 obstacle points.Through comprehensive superposition,the first-level compensation corridor was mainly composed of Minjiang River,Pihe River and other river channels,the second-level transport corridor was mainly distributed in the area with dense“sink”landscape,and the third-level action corridor was mainly distributed in the high-intensity construction area.[Conclusion]The optimization pattern of a multi-level ecological network based on the“source-sink”theory is an important measure for effectively mitigating the urban heat island effect.[Ch,4 fig.3 tab.25 ref.]
作者
潘振华
周媛
姚婧
宁顺斌
罗于舒
汪曼林
PAN Zhenhua;ZHOU Yuan;YAO Jing;NING Shunbin;LUO Yushu;WANG Manlin(School of Architecture,Southwest Minzu University,Chengdu 610225,Sichuan,China;CAS Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110164,Liaoning,China;Chengdu Economic Development Academy,Chengdu 610072,Sichuan,China)
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2024年第5期1085-1093,共9页
Journal of Zhejiang A&F University
基金
国家自然科学基金资助项目(52078440)
四川省自然科学基金资助项目(2022NSFSC1160)
西南民族大学中央高校基本科研业务费专项资金项目(ZYN2022071)。
