摘要
以无锡市为研究区,分析了1988-2016年无锡市不透水面扩张特征,并利用重力学模型分析了不透水面扩张对太湖水环境的影响。结果表明,无锡市不透水面呈显著上升趋势。不透水面比率由1988年的4.1%上升至2016年的32.3%。不透水表面空间影响力与太湖水质呈显著的相关性,水体总氮、硅含量与不透水面的空间影响力G相关性最好,相关系数分别为0.929和0.857。叶绿素a浓度、高锰酸钾指数、水温以及2004年前的总磷与无机磷含量与G的相关系数均大于0.6。可见,城市不透水面扩张对周边水体有较大的影响。
This paper took Wuxi City as the research area and analyzed the urban expansion characteristics of Wuxi City from 1988 to 2016.At the same time,the influence of impervious surface expansion on water environment of Taihu was analyzed by using gravity model.The results show that the urban impervious surface of Wuxi has a significant increase in 28 years.The urban impervious surface ratio rose from 4.1%in 1988 to 32.3%in 2016.There is a significant correlation between the spatial influence of impervious surfaces and water quality of lakes.The correlation between the total nitrogen and silicon content of Taihu and the spatial influence G of impervious surface was best,with the correlation coefficients were 0.929 and 0.857 respectively.The correlation coefficients between chlorophyll a concentration,potassium permanganate index,water temperature,inorganic phosphorus and and total phosphorus before 2004,and G were all greater than 0.6.It can be seen that the expansion of urban impervious surface has a great influence on the natural water around the city.
作者
蔡文婷
赵书河
刘小煜
彭凡晨
王亚梅
CAI Wenting;ZHAO Shuhe;LIU Xiaoyu;PENG Fanchen;WANG Yamei(School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210023,China;Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Nanjing 210023,China)
出处
《测绘地理信息》
2020年第4期110-115,共6页
Journal of Geomatics
基金
国家重点研发计划(2016YFC0401502,2016YFB0502503)。
关键词
不透水面
线性光谱混合模型
城市扩张
太湖
水环境
impervious surface
linear spectral unmixing model
urban expansion
Taihu
water environment
