成都市地表温度对不透水面的响应研究

根据成都三环路内的Landsat 7/ETM+影像,利用单窗算法和不透水面与植被覆盖度在城市建成区呈负相关关系两种反演方法,通过空间建模建立反演模型,获取地表温度与不透水面信息。通过随机样点分析、相关性分析以及等温线与等透水面线叠加分析等方法,研究了城市地表温度对不透水面的响应效果。结果表明:地表温度随距市中心区距离增大而降低,同时不透水能力也降低;成都市地表温度与不透水面之间存在着正相关关系,相关度为0.7253;等透水面线的空间分布对等温线具有显著的响应规律。研究成果对于改善城市生态环境、提升土地利用水平和加强科学规划等都具有参考价值。

Study on Response of Urban Surface Temperature to Impervious Surface Area in the City Chengdu.

This paper studies the response of urban surface temperature to the impervious surface area in Chengdu,using mono-window algorithm to retrieve surface temperature from Landsat 7/ETM+ images.A negative correlation between impervious surface and vegetation cover was obtained in built-up area of the city.The study on response of urban surface temperature to the impervious surface area in Chengdu was conducted through the random sample analysis,correlation analysis,overlay analysis of isotherms analysis and equal surface water lines analysis.It is proved that the surface temperature and impervious getting lower with the increasing distance from the city center;there is a positive correlation--0.7253 between surface temperature and surface impervious in Chengdu,The spatial distribution of the isotherms with the response of permeable surface is significant.The research results have a reference value in fields of improving the urban ecological environment,enhancing the level of land-use and strengthening the urban scientific planning.