山地城市热环境及其聚落特征的关联分析

以重庆主城区为研究对象，利用Landsat 8传感器OLI和TIRS获取的遥感影像为数据源，进行城市聚落特征包括地形特征、土地利用等与地表温度的差异性分析。结果表明：城市的热环境空间分布差异较大，海拔高度对温度的影响强于地形起伏度；（NDVI、NDBI、MNDWI等）和地表温度的相关关系呈分段线性关系；不同土地利用类型的热强度和热变异程度差异明显，建设用地的温度最高且斑块温度间的变异性最强，虽然水体的平均温度最低，但斑块温度间的变异性却较高；从格网分析的结果可以看出，格网内部水体的“冷岛效应”明显、建设用地的“热岛效应”显著，耕地与自然植被面积的增加使得各空间格网温度更趋向于稳定。

The correlation analysis of surface thermal environment and settlement characteristics in the hilly city

Taking urban district of Chongqing as the research area, we analyzed the relationship between urban settlement characteristics and the surface temperature by using remote sensing image of Landsat 8 sensor OLI and TIRS as data source. The results show that the spatial distribution of the urban thermal environment is significant different. The elevation plays a much more role in affecting the urban land thermal environment than the topography The correlation between underlying surface parameters and the surface temperature show the piecewise linear relationship. The hot intensity of different land use types and thermal variation are significantly different, and the temperature and its variability of construction land are the highest among different land use types. In addition, the average temperature of water is the lowest, but its temperature variability is the highest. The grid analysis shows the water has obvious Cold Island Effect while the construction land has obvious Heat Island Effect. The increase of cultivated land and natural plant coved land stabilizes the analysis gird unit temperature.