摘要
以福建省龙岩市为研究区,利用Landsat系列卫星影像数据,反演地表温度、不透水面盖度、植被覆盖度和水体指数等地表参数,分析亚热带山地型城市的热环境效应及其影响因素。结果表明:2002—2014年间研究区建筑用地面积增长较快,主要侵占农田和林地等,建筑物密度与地表温度之间呈正相关关系,对地表温度变化起明显促进作用,且权重越来越大;而植被覆盖度、水体指数与地表温度呈现负相关关系,对热环境效应具有抑制作用;海拔高程与地表温度呈现幂函数负相关关系,随着高程增加热环境效应越来越弱。因此,城市建设规划要处理好不透水面与植被(或水体)的比例,避免对城市生态环境造成负面效应。
The urban thermal environment is a common phenomenon with the urbanization development. Using different kinds of land surface parameters, such as land surface temperature （ LST） , enhanced index - based built - up index （ EIBI）, fractional vegetation coverage （FVC ）, modifying normalization difference wTater index （ MNDWI） and the elevation （ Elev） , the effects in subtropical mountainous region from the urban thermal environment have been evaluated and Longyan city as a classical mountainous region in Fujian Province is selected. The results demonstrate that the EIBI has a high positive correlation to the LST, and the building regions in Longyan city increased rapidly with the decrease of large areas of farmlands and forests,which makes the LST increase obviously during 2002 to 2014. While the FVC and the MNDWI have negative correlation to the LST, wThich are conducive to low LST in the city. Additionally,the Elev has a negative power function correlation to the LST,and the LST drops little when the elevation of the city stays at a high level. Therefore,in order to develop a better urban ecological environment,it is quite important to control the areas of the impervious surfaces in the city,and increase the vegetation and waters areas as more as possible.
作者
吴志杰
林金堂
邹丹
傅娇凤
WU Zhijie LIN Jintang ZOU Dan FU Jiaofeng(Longyan University, Longyan,Fujian 364000, Chin)
出处
《龙岩学院学报》
2016年第5期86-92,共7页
Journal of Longyan University
基金
福建省自然科学基金项目(2012D104)
福建省教育厅中青年教师教育科研项目(JA15491)
