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遥感技术与应用  2014, Vol. 29 Issue (2): 264-272    DOI: 10.11873j.issn.1004-0323.2014.2.0264
模型与反演     
杭州市城市空间扩展及其热环境变化
李乐,徐涵秋
(福州大学环境与资源学院,福州大学遥感信息工程研究所,福建 福州 350108)
Urban Expansion and Thermal Environment Changes in Hangzhou City of East China
Li Le,Xu Hanqiu
(College of Environment and Resources,Fuzhou University;Institute of Remote Sensing Information Engineering,Fuzhou University,Fuzhou 350108,China)
 全文: PDF(3299 KB)  
摘要:

通过Landsat卫星影像分别获取了杭州市1989、2000和2010年的城市空间扩张、地表温度及作为主要地表参数的建筑用地和植被的信息,用以研究杭州市城市扩展及其城市热环境变化。结果表明:在21 a间,杭州市建成区范围有了大幅扩展,且城市热岛区域的空间变化与建成区的空间扩展变化基本一致。研究还发现杭州市区的特高温区面积比例在逐渐减小,城市热岛比例指数(URI)从0.78降至0.71,表明城市热岛效应有一定缓解。建筑用地比例的减小与建筑用地密度的下降是城市热岛得以缓解的主要原因。定量分析表明建筑用地的升温效应要强于植被的降温效应。总的看来,杭州市的城市热岛效应现象在整个研究时段内虽有一定的改善,但仍一直处于较强烈的状态。

关键词: 遥感城市热岛URI城市空间扩展杭州    
Abstract:

This paper aims to study the relationship between urban expansion and thermal environment changes in Hangzhou,China.The study is of great importance in the field of city planning which helps the cities sustainable development.By analyzing multitemporal Landsat satellite images of the city,the information of urban expansion,Land Surface Temperature (LST),built\|up land,and vegetation in 1989,2000 and 2010 were collected for quantitative analysis.The study results show that during the past 21 years,Hangzhous urban heat island area expanded greatly in accordance with the citys built\|up area expansion.Nevertheless,statistics shows that the percentage of the citys high temperature area has decreased gradually,the Urban\|Heat\|Island Ratio Index (URI) declined from 0.78 to 0.71.This suggests that the urban heat island effect has mitigated due to the reduction of built\|up land density.Quantitative analysis proves that the contribution of built\|up land to LST rise is greater than that of vegetation to LST decreasing.On the whole,despite some minor mitigation,Hangzhous urban heat island phenomenon was still in a strong status during the 21\|year study period.

Key words: Remote Sensing    Urban heat is land    URI    Urban Expansion    Hangzhou City
收稿日期: 2013-01-28 出版日期: 2014-05-14
:  TP 79  
基金资助:

国家科技支撑项目(2013BAC08B01),福建省自然科学基金项目(2011J01269)。

通讯作者: 徐涵秋(1955-),男,江苏盐城人,教授,博士生导师,主要从事环境与资源遥感应用研究。Email:hxu@fzu.edu.cn。   
作者简介: 李乐(1989-),女,陕西合阳人,硕士研究生,主要从事环境与资源遥感应用研究。Email:ll_fzu_edu@163.com。
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引用本文:

李乐,徐涵秋. 杭州市城市空间扩展及其热环境变化[J]. 遥感技术与应用, 2014, 29(2): 264-272.

Li Le,Xu Hanqiu. Urban Expansion and Thermal Environment Changes in Hangzhou City of East China. Remote Sensing Technology and Application, 2014, 29(2): 264-272.

链接本文:

http://www.rsta.ac.cn/CN/10.11873j.issn.1004-0323.2014.2.0264        http://www.rsta.ac.cn/CN/Y2014/V29/I2/264

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