环境保护科学2025，Vol.51Issue(6)：14-21,98,9.DOI:10.16803/j.cnki.issn.1004-6216.202408029
超大城市中心城区深隧排水系统污染控制模拟
Simulation of pollutant sources control in the central urban area of megacity based on deep tunnel drainage system
摘要
Abstract
To study the environmental benefits of implementing a deep tunnel drainage system in the central urban area of a megacity,this paper took Chengdu as a case study.Through methods such as pollutant source analysis and water environment quality model simulation,the pollutant reduction benefits and river water quality improvement effect were analyzed.The results showed that after the implementation of the deep tunnel drainage system,the amount of pollutants entering the river was significantly reduced.The inflow of chemical oxygen demand(CODCr),ammonia nitrogen(NH3-N),and total phosphorus(TP)into the river was reduced by 64%,83%,and 72%respectively compared with the current year.Under the maximum limit rainfall intensities of light rain,moderate rain,and heavy rain,the proportion of intercepted pollutants from 8 mm initial rainwater was 86.4%,51.3%,and 40.6%respectively.The water quality of river sections was improved to varying degrees.Under non-rainfall scenarios,the average concentrations of CODCr,NH3-N,and TP decreased by 15%,29%,and 10%respectively.Intercepting 8 mm initial rainwater could significantly improve the river water quality during rainfall periods.Under the condition of 60-minute heavy rainfall with a 5-year return period in the wet season,the average concentrations of CODCr,NH3-N,and TP in river sections decreased by 35%,14%,and 23%respectively.关键词
深隧排水系统/污染源控制/初期雨水/MIKE 11模型Key words
deep tunnel drainage system/pollutant sources control/initial rainwater/MIKE 11 model分类
资源环境引用本文复制引用
佘佳,张倩,王一舒,石清,陈新拓,颜钰珂..超大城市中心城区深隧排水系统污染控制模拟[J].环境保护科学,2025,51(6):14-21,98,9.基金项目
长江生态环境保护修复城市驻点跟踪研究—成都市长江水生态环境保护研究(2022-LHYJ-02-0509-01) （2022-LHYJ-02-0509-01）
