RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2009, Vol. 18 >> Issue (1): 60-.

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INVESTIGATION ON URBAN HEAT ISLAND EFFECT OF CHONGQING CITY BASED ON QUANTITATIVE REMOTE SENSING TECHNIQUE

LI Chengfan1|2| LIU Lan3| ZHOU Tinggang1|2| ZHANG Li1| WU Zhongfang1   

  1. 1.School of Geographical Sciences| Southwest China University| Chongqing 400715| China； 
    2.Key Laboratory of Ecoenvironments in Three Gorges Reservoir Region| Chongqing 400715| China； 
    3.School of Foreign Languages| Southwest China University| Chongqing 400715| China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-01-20

Abstract:

In the recent years，the urban heatisland effect is strengthening continuously and it has become a prominent urban environmental problem.As one of the biggest cities along the Yangtze River，Chongqing City has the developed industry and rapidexpanding economy，meanwhile the heat island effect is obvious，however it was rarely studied.With Landsat5 TM image of the year 2007 as the data source，this paper first had an inversion of the land surface temperature of Chongqing City with monowindow algorithm；secondly it gave a partition of the planetary brightness temperature hierarchical，and thirdly it studied both the intensity of Chongqing City urban heatisland effect and the spatial pattern distribution and the features from several perspectives，for example the overlay analysis of the urban land use type and NDVI，etc.The above analysis indicates that the urban island effect is obvious and it is not welldistributed；the influences of different landuse types on the heatisland effect vary；and the urban land surface brightness temperature has a significant linearnegative correlation with NDVI.Finally，combining the special terrain of Chongqing City，this paper proposes some countermeasures and solutions for urban heatisland effect，including enhancing the urban planning and adjusting the city layout；constructing the optimal structure of green belts and improving the urban green coverage rate；changing the structure of energy sources，improving the efficiency of the energy utilization and controlling the petrolengine waste gas emission of factories.Hopefully this study could provide a basis of scientific policy for the ecological environmental construction and the urban programming，management and environmental protection department；and finally helps realizing the harmonious sustainable development of human society and biological environment.

Key words: remote sensing, urban heat island effect, Chongqing urban district, NDVI, monowindow algorithm

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