针对流域污染物总量控制定额在水资源保护中的重要性以及水体纳污能力具有季节性变化，参考河流二维模型参数的确定方法，探讨采用河流二维模型对水体纳污能力进行计算。从保护环境出发，考虑到同一条河流中不同水功能区的纳污能力不同，提出了选取最小纳污能力作为该河流的污染物总量控制定额。最后对渭河流域宝鸡市河段纳污能力及污染物控制总量定额进行了分析计算，为宝鸡市河流水污染控制提供了依据。

Considering the importance of the allowable pollutant total control quota in water resources protection and the seasonal variation of water environmental carrying capacity, and with referencing the determination of river two-dimensional model parameters, a calculation method on pollution carrying capacity is explored by using this model. With an eye to the environmental protection and the differences of environmental carrying capacity among water functional areas, a suggestion that selecting a function area of the minimum bearing capacity is regarded as to be the allowable pollutant total control quota is proposed. Such analysis calculation method of water environmental carrying capacity and allowable pollutant total control quota can provide basis for water pollution control of rivers in Baoji City.