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.