地下水内排对南水北调中线干渠水质的影响  

Impact of groundwater internal discharge on the water quality of open channel in the Middle Route of South-to-North Water Transfer Project

作　　者：王兴伟[1] 陈家军[1] 

机构地区：[1]北京师范大学环境学院水沙科学教育部重点实验室,北京100875

出　　处：《南水北调与水利科技》2015年第5期1005-1009,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：国家科技支撑计划课题(2001BAC12AB02)

摘　　要：基于MIKE 11模型的水动力模块、对流扩散模块建立南水北调中线输水干渠水质模型,充分考虑了干渠两侧地下水内排段的影响,以京石段为干渠水质模拟示范段,针对内排段水质对干渠水质的风险特征,选取氨氮作为典型污染组分,结合实际工程设计,计算在最不利工况下的内排量,并依此设定情景模拟内排段水质对干渠水质的影响。模拟结果表明,在假定的内排段污染风险达到极大的情况下(水质处于劣Ⅴ类),排入干渠的地下水对干渠水质基本不构成影响。Guarantee of water quality in the Middle Route of South-to-North Water Transfer Project is key for successful operation of the project.In this study,a coupling model integrating water quality and quantity between channel water and groundwater along the channel was developed based on the hydrodynamic and advection-diffusion modules of MIKE11.The model considered the impacts of groundwater internal discharge section along the channel and Beijing-Shijiazhuang section was selected as the simulation demonstration section.In terms of the characteristics of water quality in the internal discharge section,NH3-N was selected as the typical pollutant composition.According to the actual engineering design,water quantity of the internal discharge section was calculated under the most disadvantage working conditions,and the impacts of water quality in the internal discharge section on the channel were simulated using the scenario analysis.The results indicated that there is no impact on the channel water quality under the most serious scenario in which groundwater inthe internal discharge section is contaminated very seriously.

关 键 词：南水北调中线 地下水 京石段 内排段 氨氮 水质模拟 风险预测 MIKE 11 

分 类 号：TV68[水利工程—水利水电工程]