人民长江2013，Vol.44Issue(7)：51-55,5.
重庆市主城区热岛效应与植被覆盖关系研究
Relationship between urban heat island effect and vegetation cover in core area of Chongqing City
摘要
Abstract
In order to study the relationship between urban heat island effect and vegetation cover in the core area of Chongqing City, the NDVI (Normalized Difference Vegetation Index) is extracted from TM images of the core area of the city in 2008, and the land surface’s vegetation cover data are obtained by field investigation. The relationship between vegetation cover and urban heat island effect was analyzed on the basis of GIS data and corresponding mathematical statistics. The analysis results show that the urban heat island effect in the city core area is very obvious, which extensively appears in a large and connected areas; the urban heat island effect is negatively interrelated with vegetation cover, it reduces with the increase of vegetation cover rate and disappears if the vegetation cover rate is greater than 50%. The bigger area of urban green space is, the bigger temperature differ-ence exists, thereby forming a"cool island" in the heat island. Therefore, the urban green space has an important role in mitiga-ting the urban heat island effect.关键词
RS/GIS/热岛效应/植被覆盖/城市绿地/重庆市Key words
RS/GIS/urban heat island effect/vegetation cover/urban green space/Chongqing City分类
资源环境引用本文复制引用
杨春华,雷波,张晟..重庆市主城区热岛效应与植被覆盖关系研究[J].人民长江,2013,44(7):51-55,5.
