南京市高淳区城市水网水环境改善模拟研究

现代城市多面临水质型缺水问题,城市水系多因污染物超标排放、水系不流通导致水质较差,无法达到相应水功能区水质目标。城市水网的构建是解决区域水资源调配不均、水环境不达标的重要手段之一。以南京市高淳区固城湖、水碧桥河、石固河、官溪河为研究对象,通过构建一维、二维水动力水质耦合模型,选取COD、NH3-N作为水质指标,模拟不同水资源利用情况下研究区域内水体水质分布情况,评估河湖水网连接对水体水质的改善效果。研究表明,河湖水网健康连通及科学调度可显著改善水体水质。

Simulation Study on Water Environment Improvement of Urban Water Network in Gaochun district,Nanjing city

Most of modern cities face the problem of pollution-induced water shortage.Almost all river systems in urban cities are of bad water quality because of excessive discharge of pollutants and low efficiency of water connection.The construction of connection among river systems in cities is one of the most important measures to handle the problems of uneven allocation of water resources and poor water quality.This article chooses Gucheng lake,Shuibiqiao river,Shigu river,Guanxi river in Gaochun district,Nanjing city as research subjects.Constructed coupled one dimension and two dimensions hydraulic and advection-diffusion model.Chose COD and NH3-N as water quality indexes.Simulated spatial-temporal change of water quality indexes under different water utilization scenarios.And then evaluated effect of water improvement under the construction of connection among river systems.The study shows that connection between river systems and scientifically regulation can significantly improve water quality in river systems.