引言城市湿地是指分布于城市核心区和近郊区,与城市形成、发展息息相关,为实现城市建设目标提供保障的各类湿地,是城市生态系统的重要组分。目前,城市湿地面积日益缩小,水质不断恶化,面临着功能退化的威胁。植物是湿地景观的重要组成部分,在改善城市生态环境、调节小气候方面具有重要作用。通过卫星、航拍等资料进行的研究表明,城区大面积湿地或植被的区 Introduction Urban wetlands are all kinds of wetlands distributed in the core and suburban areas of the city, which are closely related to the formation and development of cities and provide the guarantee for the goal of urban construction. They are the important components of the urban ecosystem. At present, urban wetlands are shrinking in area and deteriorating water quality, threatening the degeneration of functions. Plants are an important part of wetland landscape and play an important role in improving urban ecological environment and regulating microclimate. The research conducted through satellite and aerial photography shows that the large wetland or vegetation area in the urban area