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Analysis of the impact factors of urban heat island effect based on the intensive land use level

HA Shangchen;Alimujiang Kasimu;School of Geographical Science & Tourism,Xinjiang Normal University;Center of Xinjiang Urbanization Development Study,Xinjiang Normal University;  
Landsat TM/ETM + thermal infrared remote sensing data of Uriimqi on August 6,1990,July 11,2001 and July 4,2013 are used to derive brightness temperature and classify the temperature using mean-standard deviation method.In 1990,2001 and 2013,the maximum heat island effect intensity was 11.48 ℃,12.06 ℃and 14.01℃,respectively;the weighted average heat island effect intensity was 1.033 ℃,1.603 ℃ and1.236 ℃,respectively;the urban heat island ration index was 0.1054,0.3945 and 0.4328,respectively.The results showed that in the study years,the average level of urban heat island effect in Uriimqi was first increasing and then decreasing;the maximum urban heat island intensity and development degree were both increasing,which illustrated that heat island had preliminarily formed in the city,the temperature of city's hot zones was continuously increasing and the hot areas had expanded.Using the PSR model to construct an index system to evaluate the level of urban intensive land use,it was obtained that during the same period,Uriimqi's intensive land use level and its coordination were in raising.From the evaluation results,one can see that the urban heat island effect factors based on urban intensive land use can be drawn by a lot of correlation analyses,which include population density,the green space coverage,the GNP per land area,the construction land area per capita,the road surface area per capita and the fixed assets investment per land area.
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