城市三维形态与热环境相关性分析与平台构建

Urban 3D Morphology and Thermal Environment Correlation Analysis and Platform Construction

通过构建研究区UDEM,计算得到占空度、均匀度、错落度、最大高度、平均高度、平均体积等三维形态指标;利用2月Landsat8遥感影像热红外波段进行地表温度反演,探究了冬季城市热环境与城市三维形态的相关性;利用GIS二次开发技术设计并实现了城市三维形态指标动态计算分析原型平台,增强了城市三维指标计算的灵活性和便捷性。结果表明,研究区起伏度、平均高度、最大高度、错落度、占空度与冬季地表温度呈微弱负相关关系(相关系数分别为-0.20、-0.29、-0.29、-0.11和-0.11);植被覆盖度、建筑密度与地表温度呈微弱正相关关系(相关系数为0.22);绿化率、均匀度、拥挤度与地表温度的相关性亦较弱。

In this article,we calculated the 3D morphological indexes such as duty cycle,uniformity,patch height,maximum height,average height and average volume through the construction of UDEM.And then,in order to explore the correlation between the winter urban thermal environment and urban 3D morphology,we used the thermal infrared band of Landsat8 remote sensing images in February to achieve surface temperature inversion.Finally,we used the secondary development technology of GIS to design and implement a dynamic calculation and analysis prototype platform for urban 3D morphological indexes,which could enhance the flexibility and convenience of urban 3D index calculation.The analysis results show that the undulation,average height,maximum height,patch height and duty cycle of study area have weakly negative correlation with the surface temperature in winter(correlation coefficients are-0.20,-0.29,-0.29,-0.11,-0.11,respectively).The vegetation coverage and building density have weakly positive correlation with the surface temperature(correlation coefficient is 0.22).The greening rate,uniformity,congestion and the surface temperature are also weakly correlated.