彩钢板建筑聚集密度对城市热岛效应影响分析——以兰州市为例

城市中大规模密集分布的彩钢板建筑因其材质的特殊性而成为新的"热源",研究其对热岛效应的影响对于城市规划发展及生态环境的建设都具有重要意义.以兰州市为例,系统地研究了彩钢板建筑聚集密度与热岛效应的相关性.首先,基于国产GF-2影像提取了彩钢板建筑信息,并利用距离加权算法计算了彩钢板建筑聚集密度;其次,基于Landsat ...

Analysis of the influence of the concentration density of colored steel building in Lanzhou City on the urban heat island effect-taking Lanzhou city as an example

Due to the particularity of its material, the large-scale and densely distributed color steel plate buildings in the city are regarded as the new "heat source", it is of great significance to study its influence on heat island effect for urban planning development and ecological environment construction. Taking Lanzhou city as an example, the correlation between the aggregation density of colored steel plate buildings and the heat island effect has been systematically studied in this paper. Firstly, the building information of color steel plate was extracted based on GF-2 image, and distance weighting algorithm was used to calculate the aggregation density of color steel plate buildings; secondly, based on Landsat 8 images, the single window algorithm was used to invert the land surface temperature; finally, the correlation between the density of colored steel plate building and surface temperature and the optimal scale of influence were analyzed. It is concluded that the urban heat island effect is intensified by the large number of color steel plate buildings, especially the large color steel plate buildings; the color steel plate buildings in the high temperature area account for the largest proportion, and the low temperature area is the smallest; it is significant positive correlation between the scale radius of 30 m, 60 m and 90 m for the aggregation density of colored steel plate buildings and the surface temperature, the effect is best when the radius is 30 m, and the correlation coefficient is 0.775, the larger the radius is, the weaker the correlation is.