Study on heat island effect of urban sewage treatment plant based on remote sensing technology

Abstract

The urban heat island effect has become one of the important factors that affect the local climate change in the development of urbanization. As part of the city the necessary infrastructure, the impacts of urban sewage treatment plants on global climate change have received widespread concern and research, however, the influence of the local climate change is rarely studied. This paper first attempts to use the Landsat satellite remote sensing image to study the urban heat island effect of city sewage treatment plant in Suzhou city during the period of 1995－2013, and its influencing factors are analysed. It was found that the heat island intensity of 11 urban sewage treatment plants increased by 48% in the whole 18 years. From the perspective of the time dimension, in the sewage treatment plant construction or upgrading phase, the heat island intensity is high. According to the regression analysis, it is found that the average temperature of the urban surface, the construction and construction of sewage treatment plants and the main treatment process and WHII has a significant positive correlation. 热岛效应已成为城市化发展中影响局地气候变化的重要因素之一。作为城市必要基础设施的一部分，城市污水处理厂对全球性气候变化的影响受到了广泛关注和研究，而对局地气候变化的影响却鲜有研究。文章首次尝试利用Landsat卫星遥感图像对1995年-2013年间苏州市11座城市污水处理厂进行了热岛效应研究，并对影响因素进行了初步分析。结果发现，11座城市污水处理厂热岛强度在18年间整体上增加了48%；从时间维度上来看，在污水处理厂施工建设或升级改造阶段，热岛强度都偏高。而根据回归分析发现，城市地表平均温度、污水处理厂的施工建设状态和主体处理工艺与WHII具有显著正相关性。