城市地表水体径流污染模拟分析:以苍海湖为例

在我国城市持续推进绿色发展理念的背景下,为科学支撑海绵城市规划编制工作,以梧州市苍海湖为研究实例,结合国内外相关研究经验和属地化的测量参数,应用InfoWorks ICM构建研究区水量水质数学模型。设计旱季和雨季两种模拟情景,分别对苍海湖汇水区内的污染物径流冲刷效应和湖体内污染物迁移扩散规律进行模拟分析,计算不同设计情景下地表污染物随雨水径流进入苍海湖及在湖内扩散的演进过程,并基于计算结果为苍海湖水动力条件改善、湖泊水质保护等提出工程指引建议,以期为水量水质数学模型在海绵城市规划中的应用提供参考。

Simulation of Runoff Pollution in Urban Surface Water:Case Study of Canghai Lake

With the continuous promotion of green development concept in cities of China,in order to scientifically support the preparation of sponge city planning,a mathematical model of water quantity and water quality in Canghai Lake,Wuzhou was established by using InfoWorks ICM and combining relevant research experience at home and abroad and local measurement parameters.Two scenarios of dry season and rainy season were designed to simulate the runoff scour effect of pollutants in Canghai Lake catchment and the migration and diffusion of pollutants in the lake,respectively,and the evolution process of surface pollutants entering Canghai Lake with rainwater runoff and diffusing in the lake under different design scenarios were calculated.Based on the calculation results,engineering guidelines and suggestions were proposed to improve the hydrodynamic conditions and protect the water quality of Canghai Lake,so as to provide reference for application of mathematical model of water quantity and water quality in sponge city planning.