中文摘要：

利用1999年8月12日的Landsat-7 ETM＋数据，经辐射定标、NDVI及地表比辐射率计算，通过简化大气辐射传输模型，对银川市的地表温度进行了反演。在此基础上，对银川市的城市热岛分布特征和热场变异指数进行了研究。结果表明，银川市具有典型城市热岛效应，城区的地表温度比市郊引黄灌区高出10％左右；银川市生态环境质量出现了两个极端，即市区生态评价指标为极差，而市郊引黄灌区的生态评价指标为优。

英文摘要：

After calculating radiance, Noimalized Difference Vegetation Index （NDVI） and land surface emissivity, the land surface temperature of Yinchuan area is retrieved from Landsat-7 ETM ＋ data, which were obtained on August 12, 1999, utilizing a simplification radiation transfer equation. With retrieved land surface temperature of Yinchuan, the paper also analyzes the urban heat island distribution and calculates the urban thermal field variance index that used to quantitatively analyze the urban heat island effect. The results show that there is a typical urban heat island effect in Yinchuan area. The land surface temperature of urban areas is 10℃ higher than the temperature of suburban areas which is irrigation area of Yellow River. The eco-environmental quality has two extremity that is urban areas has a low ecological evaluation index, but suburban areas has a high ecological evaluation index.