基于Landsat 8影像的马鞍山市热岛效应研究

A Research of Urban Heat Island Effect in Ma'anshan City Based on Landsat 8 Image

以2013年08月11日马鞍山市Landsat 8影像为数据源,利用ENVI软件反演了马鞍山市雨山区和花山区的地表亮度温度,再将地表亮度温度值归一化处理,划分为强绿岛区、绿岛区、正常区、热岛区和强热岛区5个等级.分析了马鞍山市热岛效应空间分布情况,并结合归一化植被指数(NDVI)和归一化裸地与建筑用地指数(NDBBI)与地表温度的相关性对马鞍山市热岛效应进行分析.结果表明:(1)马鞍山市热岛效应强的地区位于雨山区沿长江南北向延伸,城市建设用地的地表温度明显高于其他用地;(2)地表温度与NDVI呈负相关,与NDBBI呈正相关;(3)城市化、下垫面变化、工业生产等是造成马鞍山市城市热岛效应强烈的主要原因.

Based on Landsat 8 image for the data source on August 11,2013 in Ma＇anshan City,this paper uses ENVI software to invert the surface brightness temperature of Huashan District and Yushan District,and normalizes the value of the surface brightness temperature. The urban heat island effect in Ma＇anshan City is divided into strong green zone,green zone,normal zone,heat island zone and strong heat island zone. Then the paper analyzes the spatial distribution of the urban heat island effect in Ma＇anshan City and the urban heat island effect with the correlation for the normalized difference vegetation index（NDVI）,and normalizes difference bareness and built-up index（NDBBI） and surface temperature. The results show that：（1） The strong heat island zone of Ma＇anshan City was Yushan District along the Yangtze River north-south extension,and the land surface temperature of the urban construction was significantly higher than the other land;（2） The surface temperature was negatively correlated with NDVI,and it was positively correlated with NDBBI;（3） Urbanization,land surface change and industrial production were the main reason that caused a strong urban heat island effect in Ma＇anshan City.