摘要
采用1991年7月23日和1999年10月1日的陆地卫星TM6数据,分析了杭州市的城市热岛效应现状及两个时相杭州市热环境格局的变化.监测结果表明,两个时相的杭州市热环境具有明显不同的格局.1991年杭州热岛主要表现为在市中心以集中连片方式出现,1999年热岛现象则主要表现为市中心热岛效应明显缓解,城市热岛从市中心向城郊转移.值得一提的是发现了引水条件下西湖流场的特点,如能长期系统的研究,将对西湖的环境保护工作以及对西湖水质变化综合分析会有很好的指导意义.
The effect of heat island and changes of thermal environment between 1991 and 1999 in hangzhou city were analyzed by using Landsat TM6 images which were obtained on the 23rd July, 1991 and 1st October, 1999, respectively. The results showed that there happened a distinct change of the thermal environment in hangzhou city. Heat island was mainly present around-the-clock at the center of hangzhou city in 1991, but in 1999, it transferred from the city center to the outskirt, and in the center its effect was lower. In addition, the character of flow fields of West Lake was also displayed under the condition of irrigation from Qiantang river, it would have good guidable meanings for the environment protection and the analysis of water quality, if it was able to be studied for long-term.
出处
《科技通报》
北大核心
2004年第6期501-505,共5页
Bulletin of Science and Technology
关键词
热岛
卫星遥感
变化监测
热红外
heat island
remote sensing
change detection
thermal infrared
