济南市主城区空间形态对地表温度影响的交互关系及空间效应

Effect of spatial morphologyyon land1surfaceetemperature and their interaction:A case study of main urban area of Jinan City

基于济南市主城区的三维建筑数据、Landsat遥感影像等多源数据,运用地理探测器、空间杜宾模型等方法,分析空间形态对地表温度影响的作用关系及空间效应。结果表明:1)研究区域地表温度呈显著的空间正相关性,高值区主要位于城市中心区域,低值区多位于南、北边缘地带。2)局部区域地表温度同时受到该区域形态因子的交互作用及邻近区域空间形态的影响。绿地比例、水域比例、农田比例对地表温度呈负向影响,不透水面比例、建筑均匀指数普遍呈正向影响。局部地区至道路、工业区、蓝绿空间的距离对本地区地表温度的影响显著,而对邻近区域的影响较弱。3)各形态因子对地表温度的影响在不同空间形态分区中存在空间分异。在空间开敞的建成区,地表温度易受周边道路、工业区、蓝绿空间及建筑格局的影响。在建筑密集区域,不透水面比例与建筑形态因子的交互作用较强,建筑密度、建筑高度的负向作用凸显。在自然地表密集区域,绿地比例、水域比例、农田比例、至工业区距离对地表温度的影响显著。根据研究结论,建议采取多维形态因子协同优化及空间联动的策略,并因地制宜、分类施策,以减缓热岛效应。

Based on multi-source data such as three-dimensional building data and Landsat remote sensing images in the main urban area of Jinan City,the interactive relationship and spatial effect of spatial morphology factors on land surface temperature(LST)are analyzed respectively by employing Geodetector and spatial Durbin model in six spatial morphology zones.The results show that:1)LST in the study area has significant positive spatial correlation and obvious spatial agglomeration.The high value area concentrates on the central areas of the city,while the low value area concentrates on the marginal areas in the north and south of the urban areas.2)LST is affected not only by the interaction between spatial morphology factors within the space,but also by the impact of spatial morphology factors from adjacent spaces.Proportions of green space,water,and cropland have a negative impact on the LST,while proportion of impervious surface and building evenness index generally have a positive impact.Distances to roads,industrial areas,and blue and green spaces of local areas show more significant effects on local LST than that on neighboring areas.3)Interaction relationship and spatial effect of spatial morphology on LST varies significantly among various spatial morphology zones.In open built-up areas,roads,industrial areas,blue and green spaces and building patterns of neighboring areas show obvious effects on local LST.In compact built-up areas,the interactive influences of proportion of impervious surface and building morphology factors are more prominent,building density and building height have a significant negative impact on LST.But in areas with high natural surface coverage,proportions of green space,water,cropland,and distance to industrial areas have a greater negative impact on LST.According to the research conclusions,it is suggested to adopt the planning strategies of coordinated optimization of multi-dimensional morphology factors and spatial linkage for effectively mitigating urban heat island effect.In addition,it is necessary to choose appropriate measures that are adaptation to local condition.