摘要
以Landsat 8 TIRS遥感影像为基础数据,运用遥感技术反演襄阳市地表温度,计算热岛效应强度指数,定量分析襄阳市城市热岛效应的时空分布特征及发展趋势,并结合归一化植被指数(NDVI)、归一化建筑指数(NDBI)与地表温度进行相关性分析,探索地表植被分布状况和建筑密度对城市热岛效应的影响。结果表明,襄阳市的城市热岛效应在2014—2017年逐渐增强,热岛扩散范围主要为城市新建开发区及交通网的延伸区域。城市地表温度与归一化植被指数呈明显负相关关系,与归一化建筑指数呈明显正相关关系,且地表温度与归一化植被指数相关性尤为突出。建议在城市发展建设过程中,加强城市绿化投入,合理增加城市植被覆盖度及适度降低城市建筑密度可缓解城市热岛效应。
Based on Landsat 8 TIRS remote sensing image,the surface temperature of Xiangyang city was retrieved by remote sensing technology,and the intensity index of heat island effect was calculated.The spatial and temporal distribution characteristics and development trend of urban heat island effect in Xiangyang city were analyzed quantitatively.The correlation between normalized vegetation index(NDVI),normalized building index(NDBI)and surface temperature were analyzed.The influence of surface vegetation distribution and building density on urban heat island effect was analyzed.The results showed that the urban heat island effect in Xiangyang city gradually strengthens between 2014 and 2017,and the heat island diffusion mainly extends to the new urban development zones and the extension of traffic network.There was a negative correlation between urban surface temperature and normalized vegetation index,and a positive correlation between urban surface temperature and normalized building index,especially between urban surface temperature and normalized vegetation index.It is suggested that in the process of urban development and construction,strengthening urban greening investment,reasonably increasing urban vegetation coverage and moderately reducing urban building density can alleviate the urban heat island effect.
作者
李学敏
文力
王俪璇
LI Xue-min;WEN Li;WANG Li-xuan(College of Resource and Environment and Tourism,Hubei University of Arts and Sciences,Xiangyang 441053,Hubei,China;Institute of Tibetan Plateau,Chinese Academy of Sciences,Beijing 100101,China)
出处
《湖北农业科学》
2019年第16期41-48,共8页
Hubei Agricultural Sciences
基金
湖北文理学院大学生创新创业项目（201810519154）
湖北省自然科学基金项目（2014CFB636）
鄂北区域发展研究中心课题（2018JDA008）
关键词
归一化植被指数
归一化建筑指数
地表温度
城市热岛效应
襄阳市
normalized difference vegetation index
normalized building index
surface temperature
urban heat island effect
Xiangyang city
