萍乡市海绵城市建设对热岛效应减缓的实证研究  

Research on the Alleviation of Urban Heat Island Effect by Sponge City Construction in Pingxiang City

作　　者：刘彦泽 张红梅[1] 罗菲 邓淑芬 甘元楠 LIU Yanze;ZHANG Hongmei;LUO Fei;DENG Shufen;GAN Yuannan(The School of Hydraulic and Ecological Engineering,Nanchang Institute of Technology,Nanchang 330099,China)

机构地区：[1]南昌工程学院水利与生态工程学院,江西南昌330099

出　　处：《地理信息世界》2021年第6期59-64,71,共7页Geomatics World

基　　金：江西省科技厅重点研发计划一般项目(20192BBGL70054);南昌工程学院第十七届“挑战杯”大学生课外学术科技作品竞赛项目(zk202009);江西省教育厅科学技术研究项目(GJJ170982)。

摘　　要：为了对海绵城市建设成效进行客观评价,本文对2013、2019和2020年的Landsat 8遥感影像进行了陆表温度(Ts)反演,计算城市热岛强度(UHII),归一化热岛强度指数(NHIII),用于分析萍乡市海绵城市建设前后热岛强度的变化。并与该地区土地利用分类图及其他气象要素分布图进行叠加分析,研究城市热岛效应(UHIE)的产生机制和成因。结果表明:林地面积占比和区域的平均热岛强度呈负相关关系,相关系数为0.69;人工表面面积占比和区域平均热岛强度呈明显正相关关系,相关系数为0.86;2019和2020年夏季的平均城市热岛强度相比2013年分别下降了0.58℃和0.9℃,海绵城市建设对区域热岛效应具有缓解作用。说明在城市建设规划中,适当增加水体和绿地面积不仅可以改善城市景观,还可以缓解城市热岛效应。In order to objectively evaluate the effectiveness of sponge city construction,we retrieved the land surface temperature of Pingxiang city using Landsat 8 remote sensing images collected in 2013,2019 and 2020.After that,the urban heat island intensity (UHII) and the normalized heat island intensity index (NHIII) were calculated.Both UHII and NHIII were used to analyze the change of heat island intensity in Pingxiang city before and after sponge city construction.The distribution of UHII and NHIII were then compared to spatial distribution of land use and other meteorological elements by overlay analysis.The mechanisms and influencing factors of urban heat island effect (UHIE) were explored.Results show that:the forest area proportion is negatively related to the average UHII,with a correlation coefficient of 0.69.While the artificial surface area proportion are positively related to the average UHII,with a correlation coefficient of 0.86.Compared to the summer of year 2013,the average UHII in the summer of year 2019 and 2020 decreased by 0.58℃ and 0.9℃ respectively,indicating that the construction of sponge city in Pingxiang city help alleviate the regional heat island effect.It is suggested that the increase of water body and green space can not only optimize the urban landscape,but also effectively alleviate the UHIE.

关 键 词：海绵城市 城市热岛效应 萍乡市 陆表温度 

分 类 号：P237[天文地球—摄影测量与遥感]