基于遥感和GIS的城市水体缓解热岛效应的研究——以东莞市为例  

Urban Water Body Alleviating Heat Island Effect Based on RS and GIS:A Case Study of Dongguan City

作　　者：李东海[1] 艾彬[1] 黎夏[1] 

机构地区：[1]中山大学地理科学与规划学院,广州510275

出　　处：《热带地理》2008年第5期414-418,共5页Tropical Geography

基　　金：国家杰出青年基金资助项目(40525002);国家自然科学基金资助项目(40471105);教育部博士点基金资助项目(20040558023);"985工程"GIS与遥感的地学应用科技创新平台资助项目(105203200400006)

摘　　要：以Landsat5TM遥感影像为数据源,研究水面积比例和地表温度的关系,发现水面积比例和地表温度存在较高的线性负相关,其相关系数为﹣0.72;进一步采用空间分析方法,对比河流两岸不同距离内的城市用地温度,揭示了水体缓解城市内部热环境效应的有效范围,定量探讨了河流宽度差异引起的缓解差异。结果表明,河流对城市热环境有一定的缓解作用,有效范围约200m左右,河流越宽,缓解能力相对越强。By the data fountain from TM remote sensing images, the percentage of water surface（w%） in Dongguan City is obtained by using the spectrum characteristics of representative ground objects, and land surface temperature （LST） is inversed by taking the thermal infrared band TM6 as data fountain. The relationship between w%and LST with the spatial scale 500 m×500 m is discussed, and it is found that there is obvious negative linear relationship between them, the correlation coefficient is -0.72, which show that w % can reflect LST. In order to analyze the water body alleviation effect on urban heat island, two rivers with different width in the city are taken as important analysis objects to explore the effective range of river influence on urban inner heat environment by using spatial analysis method. The results show that the rivers have some alleviation effects on urban heat environment, and effective range is about 200 meters; the wide fiver contributes much more alleviation effect to urban LST than the narrow.

关 键 词：城市热岛效应 缓解效应 水体 

分 类 号：P416[天文地球—大气科学及气象学] P463.3