摘要
采用定量遥感与GIS相结合的方法,利用武汉市2006年TM遥感影像,定量分析武汉市植被指数和热岛效应的关系和空间分布。在空间剖面上,研究了植被指数(NDVI)与地表辐射温度的关系并对植被指数(NDVI)与地表辐射温度进行了回归拟合。在此基础上,研究了武汉市热岛空间分布,解释了武汉市热岛等级空间分布的特点。研究结果表明:植被指数(NDVI)与地表辐射温度存在着明显的负相关性;随着植被覆盖的变化,城市建设用地的地表辐射温度明显比其他土地类型敏感;城市中工业区和人口活动密集的商业区热岛强度高;水体和绿地对于分割城市热岛和缓解热岛效应有显著作用。该研究可为城市生态规划、用地合理布局等提供参考。
Urban heat island （UHI） effect has obtained more attention than ever because environmental problems caused by the urban heat island have affected people＇s daily life. In this paper, qualitative and quantitative analyses have been used to study the relationship between normalized difference vegetated index （NDVI） and surface radiation temperature. The relationship of NDVI and surface radiation temperature has been studied in spatial profile. On that basis, the paper has studied the spatial distribution of heat island in Wuhan city and explained the features of the Wuhan spatial distribution of heat island. Research results showed that there was a significant negative correlation between NDVI and the surface radiation; heating island strength was higher in industrial and commercial areas than others; Along with the change of the vegetation coverage, the urban construction land surface radiation temperature was more obvious sensitive than other land use types; Water and green space performed a distinct role to divide and mitigate the heat island effect. This research can provide reference for urban ecological planning and land use reasonable arrangement.
出处
《生态环境学报》
CSCD
北大核心
2012年第5期884-889,共6页
Ecology and Environmental Sciences
基金
国家863计划项目(2009AA122001)
武汉大学自主科研项目资助项目(121023)
关键词
植被指数
地表辐射温度
热岛空间分布
武汉市
vegetation index
surface radiation temperature
spatial distribution of heat island
Wuhan city
