拟建石佛寺水库位于辽河干流，属大型水利工程。在水库及下游河道水质主要污染物预测中，首次采用一维多点源稀释自净数学模型和完全混合式数学模型，定性、定量地模拟预测水库建成后水质变化规律。本数学模型适合辽河水系特点，较以往的数学模型更为合理和适用 The proposed Shifosi Reservoir is located in the mainstream of the Liaohe River and is a large-scale water conservancy project. In the prediction of major pollutants in water quality of reservoirs and downstream rivers, the one-dimensional multi-source dilution self-purification mathematical model and the fully-mixed mathematical model were used for the first time to qualitatively and quantitatively simulate and predict the water quality changes after the completion of the reservoir. This mathematical model is suitable for the characteristics of the Liaohe River system and is more reasonable and applicable than the previous mathematical model.