基于TM和GIS的合肥市热环境研究  

Study of Thermal Environment of Hefei City based on TM and GIS

作　　者：石涛[1] 杨元建[2,3,4] 张爱民[1,2,3,4] 蒋跃林[1] 荀尚培[2,3,4] 张宏群[2,3,4] 

机构地区：[1]安徽农业大学资源与环境学院,安徽合肥230036 [2]安徽省气象科学研究所,安徽合肥230031 [3]安徽省大气科学与卫星遥感重点实验室,安徽合肥230031 [4]农业气象灾害评估与风险转移联合实验室,安徽合肥230031

出　　处：《遥感技术与应用》2011年第2期156-162,共7页Remote Sensing Technology and Application

基　　金：安徽省国际科技合作计划项目(07080703005);科技部科技基础性工作专项(2007FY110700);安徽省外专局引智项目(G20093400002);2010年安徽省气象科学研究所科研开发项目

摘　　要：利用2007年10月5日覆盖合肥市的TM影像反演了NDVI和LST,并结合GIS技术和城市形态分维理论,分析了合肥市热环境布局以及不同热环境等级与各土地利用类型的关系。结果表明:合肥市地表温度具有东南高、西北低的热岛效应存在,热岛效应的中心并未出现在城市中心区域。LST与NDVI呈明显负相关关系(相关系数为-0.734),NDVI值每升高0.1,LST约降低0.93℃。城建面积加权环境效应贡献指数(WHI)为1.14,对热环境的作用(正向)程度最高;耕地的WHI为-0.51,对热环境的作用(负向)程度最高,且耕地在合肥市各热环境等级中都发挥了独特的作用。Based on TM data,the land surface temperature（LST） and normalized difference vegetation index（NDVI） on 5th October 2007 were retrieved quantificationally in this paper.Besides,along with the theory of fractal dimension of urban form and GIS technology,the spatial pattern of thermal environment and the relationship between land use type change and their corresponding thermal environment classes in Hefei region were analyzed.The results suggested that：the intensity of urban heat island（UHI） in Hefei was relative stronger（weaker） in southeast（northwest） area,and the core of UHI did not arise in central Hefei city.The LST has a significant linear-negative correlation with NDVI（the correlation coefficient is-0.734）,the LST would decreased 0.93℃ correspondingly if NDVI increased 0.1.The weighted heat effect index（WHI） of urban area is 1.14,which made the strongest positive effects on UHI of Hefei;while the WHI of farmland is-0.51,which made the strongest negative effects on UHI of Hefei.These results indicated that the farmland may play a critical role in all kinds of thermal environment classes.This work provided some scientific basis for reduction of UHI effect in Hefei.

关 键 词：城市热环境 土地利用类型 地表温度 热环境等级 合肥 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]