基于通用流域负荷模型( GWLF 模型) , 选取柳河流域为研究对象, 利用2006- 2014 年的水文水质数据进行水 文化学过程的模拟, 评估流域节点断面的月径流量及特征污染物负荷通量, 根据模型结果分析了特征污染物的污染 来源及贡献率。结果表明, 从年际变化上看, COD、氨氮和总氮的总负荷通量近年来有所下降, 总磷的总负荷通量呈 逐年上升趋势。从年均水平上看, COD、氨氮的点源污染与非点源污染贡献率相差不大, 均接近 50% ; 总氮的非点 源污染贡献率远远高于点源污染, 贡献率高达 79. 6% ; 总磷的污染来源主要为点源污染, 贡献率高达 74. 9% 。根据 特征污染物的污染源解析结果, 提出有针对性的削减和控制污染的措施, 为流域水污染管控提供依据。

The generalized watershed loading functio n ( GWLF) mo del was used in this paper to simulate the hydrochemical pr ocess o f Liuhe Riv er basin f rom 2006 to 2014, and to eva luate the mo nthly water flow and the load flux es o f characteristic pol2 lut ants in the basin. Acco rding to the mo del results, w e analyzed t he sources of the characterist ic po llutants and their contribu2 tion rates. T he r esults showed that in terms of inter annual variation, the total load flux o f COD, ammo nia nit rog en, and tot al ni2 tr og en decreased in r ecent years, and the tot al load flux o f total phospho rus incr eased y ea r by year. In terms of annua l av erag e level, the point source pollutio n and non2point source po llution made basically equiv alent co ntributio ns to COD and ammonia ni2 tr og en, bo th appro aching 50% . For to tal nitr ogen, the no n2 po int so ur ce pollutio n had a much hig her co ntribution rate ( up to 791 6% ) than t he point sour ce pollutio n. The main po llution source of to tal phospho rus was point so ur ce po llut ion, w hose con2 tribution rat e w as up to 741 9%

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