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摘要： 随着城市化进程的推进，位于城市或即将被纳入城市范围的重工业区终将由于有限的城市空间和高标准的环境质量要求而面临着改造或搬迁。以重庆钢铁集团为例，应用Landsat系列遥感卫星影像、城市热岛比例指数(URI)和遥感生态指数(RSEI)定量比较和分析了该集团“环保搬迁”前后的热环境及生态变化。对比搬迁前的2005年和搬迁后的2014年，重钢工业区的热岛效应显著降低，生态质量明显好转，反映这些变化的URI值从0.387下降到0.128，降低66.7%；RSEI值从0.398上升至0.553，升高38.9%。这主要得益于“环保搬迁”所带来的工业区停产以及地表覆盖类型和性质的转变。总体看来，工业区的停产，地表不透水面的减少，植被面积的增大，对缓解城市热岛效应，提高生态质量起到了关键的作用。该研究能为当代城市重工业区的改造和搬迁，实现城市的健康可持续发展提供借鉴和数据支持。 关键词： 城市热岛;  生态环境;  遥感;  重庆市;  重钢工业区     Abstract: Urbanization is typically accompanied by the reconstruction or relocation of heavy industrial areas due to limited space and high standard environmental requirements.Taking "environment\|friendly relocation" of Chongqing Iron and Steel Group as an example，this study quantitatively compares and analyzes changes of the thermal and ecological conditions before and after the relocation.Main biophysical properties of the study area and land surface temperature(LST) were retrieved from the multi\|temporal Landsat serial satellite images.Urban Heat Island Index(URI) and Remote Sensing based Ecological Index(RSEI) were employed for the study.The results reveal that urban heat island effect of the industrial area was significantly mitigated and the ecological quality was significantly improved after the relocation，suggested by the decline of URI value from 0.387 in 2005 to 0.128 in 2014(a drop of 66.7%)，and the rise of RSEI value from 0.398 to 0.553 during the same period(an increased of 38.9%).This is due largely to the halting of steel production，change of land cover types and properties caused by the “environment\|friendly relocation” of the industrial area.In general，the halting of steel production，the decrease of impervious surface and the increase of vegetation coverage can mitigate the heat island effect and improve the ecological quality.The result of this study can provide a useful case for reconstruction or relocation of urban heavy industrial area and promotion of city’s healthy sustainable development.

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