城市湖泊湿地周边建成环境绿地结构对空气PM_(10)、PM_(2.5)的影响  

Effects of Green Spaces Structures in Built Environment Around Urban Lake Wetland on Atmospheric PM_(10)and PM_(2.5)

作　　者：王婧 朱春阳[1] Wang Jing;Zhu Chunyang(College of Horticulture and Forest,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]华中农业大学园艺林学学院,武汉430070

出　　处：《中国城市林业》2022年第5期1-9,共9页Journal of Chinese Urban Forestry

基　　金：国家自然科学基金项目(31870700,31500576);国家外专项目(G2022157005L);中央高校自主创新基金项目(2662022YLYJ005)。

摘　　要：城市湿地作为城市重要的生态基础设施对区域环境具有巨大的环境效益。为了对城市湖泊湿地周边建成环境的绿地规划、更新提供科学指导,文章选取武汉主城区大、中、小3块湖泊湿地作为研究对象,基于LUR模型分析湖泊湿地周边500 m缓冲区建成环境绿地结构对空气PM_(10)、PM_(2.5)浓度的影响。结果表明:1)由测点周边25~100 m范围道路长度、非硬质下垫面面积、水体面积和距湿地边界距离、气温、相对湿度、风速等关键影响因子构建的LUR模型具有一定的可行性,经留一交叉验证后R^(2)值分别为0.555~0.980(PM_(10))、0.562~0.979(PM_(2.5))。2)湖泊湿地对乔灌草、乔草、灌草和草坪结构绿地空气PM_(10)、PM_(2.5)浓度的影响显著,其中PM_(10)的影响范围为250~350 m、50~200 m、100~250 m、100~150 m;PM_(2.5)的影响范围为200~350 m、200~300 m、150~250 m、150 m。3)近湖泊湿地边界灌草、草坪结构绿地表现出较低的空气PM_(10)、PM_(2.5)浓度,但不同结构绿地不同时段空气PM_(10)、PM_(2.5)浓度未表现出显著相关性(P>0.05)。Urban wetland creates huge environmental benefits to the regional environment as an important ecological infrastructure.To provide scientific guidance for the planning and restoration of green spaces in built environments around urban lake wetland,this paper takes three urban lakes in Wuhan,of which large,medium and small sized lakes are one of each,to investigate the effects of different green space structures on atmospheric PM_(10) and PM_(2.5) in summer in the 500 m buffer zone around the lakes using the land use regression(LUR)model.The results show that:1)the LUR models,established by considering the variables of traffic road length,green space area,water area,distance from lakes,temperature,relative humidity and wind speed within 25-100 m buffer zone around the testing points,are successfully developed with a leave⁃one⁃out cross⁃validation R^(2)of 0.555-0.980 for PM_(10)and 0.562-0.979 for PM_(2.5);2)Urban lakes have significant effects on PM_(10)and PM_(2.5)in arbor⁃shrub⁃grass,arbor⁃grass,shrub⁃grass and grass,while the impact range is 250-350 m,50-200 m,100-250 m and 100-150 m for PM_(10)and 200-350 m,200-300 m,150-250 m and 150 m for PM_(2.5);and 3)Atmospheric PM_(10)and PM_(2.5)concentrations are distributed in shrub⁃grass and grass structures close to the boundary of lakes,but they are not significantly related with green spaces with different structures(P>0.05)at different time periods.

关 键 词：城市湖泊湿地 绿地结构 空气PM_(10)和PM_(2.5) 蓝绿耦合 LUR 模型 

分 类 号：X513[环境科学与工程—环境工程] TU985.12[建筑科学—城市规划与设计]