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成都市热岛效应与城市空间发展关系分析

DOI: 10.3724/SP.J.1047.2014.00070, PP. 70-78

Keywords: 城市扩展,城市热岛比例指数,成都市,城市热岛,遥感

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Abstract:

利用Landsat卫星影像反演成都市中心城区1992、2001和2009年的地表温度,建筑用地和植被等信息,计算其城市热岛比例指数(URI),对成都市中心城区热岛效应与城市空间发展关系进行了分析。结果表明,在1992-2009年期间成都市主城区范围从91.24km2扩展到403.8km2。成都市建成区的大面积扩展导致了城市热岛空间分布发生迁移,从单中心聚集分布转变为多中心环状分布。回归分析说明,建筑用地和植被都是影响地表温度的重要因素,其中建筑用地与地表温度呈指数型正相关关系,而植被与地表温度呈负相关关系。总的看来,成都市中心城区在这17年间的热岛效应有了明显的缓解,城市热岛比例指数从0.72下降到0.33。城市植被覆盖率的增加和合理的规划对缓解城市热岛效应起到了积极的作用。

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