保证通榆河南段水质达标的区域尾水出路研究

Layout optimization of tail water diversion project with guarantee of required standard of water quality of south reach of Tongyu River

在调查通榆河南段控制单元水质及区域污染源的基础上,概化影响通榆河南段控制单元水质的污染源,建立研究区域水质数学模型,并根据设计水文条件和边界水质,分析概化排污口对控制断面水质影响权重,初步构建区域尾水出路工程布局方案,并计算控制断面水质改善效果,为区域尾水出路寻找依据。结果表明,区域尾水出路方案实施后,古贲大桥、草堰大桥控制断面COD、NH3-N、TP的质量浓度分别为17.45 mg/L、0.99 mg/L、0.2 mg/L,12.87 mg/L、0.89 mg/L、0.14mg/L,其中古贲大桥控制断面NH3-N改善效果最为明显,改善率为41%,通榆河南段水质可以满足地表水水(环境)功能区划III类标准。

Based on an investigation into the water quality of the control unit of the south reach of the Tongyu River and regional pollution sources, the pollution sources that influence the water quality of the control unit of the south reach were generalized. A water quality mathematical model was developed for the study area. Based on the designed hydrological conditions and boundary water quality, the weight analysis of the effect of the generalized drain outlet on the water quality of the control unit was conducted, the layout scheme of the regional tail water outlet was preliminarily established, and the improvement effect of the water quality of the control section was calculated, in order to find an outlet for regional tail water. The results show that after the implementation of the scheme of the regional tail water outlet, the concentrations of COD, NH3-N, and TP were 17. 45 mg/L, 0. 99 mg/L, and 0. 2 mg/L, respectively, for the Guben Bridge control section, and 12. 87 rag/L, 0. 89 rag/L, and 0. 14 rag/L, respectively, for the Caoyan Bridge control section. The concentration of NH3-N of the Guben Bridge control section was most significantly improved, with an improved efficiency of 41%. The water quality of the south reach of the Tongyu River can meet the class III standard of the surface water （environment） functional zoning.