摘要
为保障妫水河入官厅水库入流水质达标,分析水质成因,分步制订水质改善措施。采用MIKE21耦合植物作用的Ecolab生态水质模型,对妫水河下游入官厅水库断面至东大桥断面、支流三里河水域进行模拟。通过对丰水期和枯水期监测数据及模拟结果进行分析,流域上游来流水量及水质、区间污染源及河流湿地等自净作用是影响官厅水库入流水质的主要原因,其中:妫水河入流污染负荷对水库入流水质贡献率最大,丰枯水期氨氮、总磷和总氮的贡献率分别为18.32%~45.76%、9.31%~31.17%和29.34%~67.56%;区间入河污染源氨氮、总磷和总氮削减率分别为19.41%、31.31%和24.94%;丰枯水期河道自净对氨氮、总磷和总氮削减率分别为44.85%~61.29%、51.40%~77.92%和8.40%~23.06%。为改善官厅水库入流水质,在流经城市区的妫水河下游及三里河修建了河流湿地公园,对区域污染源进行截污,使得入库水质可达到Ⅲ类水。为长远确保官厅水库的水质,控制来流水质和加强流域治理是关键,同时营造岸带湿地,对水质改善有积极的作用。研究结果及方法可为水库污染防治及负荷量削减提供理论依据。
The pollution prevention measures are developed based on the causal analysis to improve the water quality of the Winter Olympic Games,to ensure the inflow water quality into Guanting Reservoir(GTR),and to meet the water functional criterion.The water quality of rivers,lakes,and reservoirs is managed delicately.A 2-dimensional model MIKE21 coupling with a"nutrients+vegetation"Ecolab module is used to compute the water quality in the downstream of Guishui River(GSR)from Dongdaqiao station to GTR,as well as the tribute of Sanli River(SLR).The pollution load of the main water quality factors on the water quality is analyzed,the phased measures are put forward,and the effect is evaluated.The water quality responses by pollution sources,self-purification ability,wetland vegetation effects,and flow rates change in flood and dry season are the main factors affecting the inflow of GTR.The monitoring data and simulation results in flood and dry periods show that the contribution rate of GSR inflow is large,and ammonia nitrogen,total phosphorus,and total nitrogen contribution rates from GSR inflow to GTR are 18.32%–45.76%,9.31%–31.17%,and 29.34%–67.56%,respectively.The reduction rates of ammonia nitrogen,total phosphorus,and total nitrogen are 44.85%–61.29%,51.40%–77.92%,and 8.40%–23.06%,respectively,in flood season including wetland vegetation action and dry season.Considering the serious water quality problems in the wet season,the construction of riparian wetland and the implementation of sewage interception measures are integrated.The simulation results show that dissolved oxygen,ammonia nitrogen,total phosphorus,and total nitrogen of Guishui River entering Guanting Reservoir are 7.23 mg/L,0.27 mg/L,0.03 mg/L,and 0.62 mg/L,respectively,which reach the class III water quality standard of surface water environment.The dissolved oxygen concentration increases by 2.99%,and the ammonia nitrogen,total phosphorus and total nitrogen concentrations decrease by 19.41%,31.31%and 24.94%,respectively.The key measures to
作者
李亚娟
杜彦良
刘培斌
王世岩
毕二平
高晓薇
殷淑华
LI Yajuan;DU Yanliang;LIU Peibin;WANG Shiyan;BI Erping;GAO Xiaowei;YIN Shuhua(School of Water Resources and Environment,China University of Geoscience(Beijing),Beijing 100083,China;Department of Water Ecology and Environmet,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Beijing Institute of Water,Beijing 100048,China)
出处
《南水北调与水利科技（中英文）》
CAS
北大核心
2021年第2期325-333,共9页
South-to-North Water Transfers and Water Science & Technology
基金
国家水体污染与治理科技重大专项(2017ZX07101004)
国家重点研发计划项目(2017YFC0405804)。
关键词
水体污染
源解析
水质水动力模型
措施评估
北方河流
water pollution
sources resolution
hydrodynamic model of water quality
measures to evaluate
the north river
