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用三维湍浮力流模式结合混合有限分析法对河流中单向性同流扩散器的近区稀释特性进行精确的数值分析，所得结果与Ｐａｒｒ的试验资料吻合良好，进而给出了稀释度在近区的经验公式，并且分析了浮力射流的分叉现象和吸附现象以及出现这两种现象的原因，发现水面对稀释有延迟作用，对分叉有促进作用。
The three-dimensional turbulent levitation model and the mixed finite analysis method were used to analyze the near-zone dilution characteristics of the unidirectional diffuser in the river. The results were in good agreement with the experimental data of Parr, and then the dilution in the near Region, and analyzes the bifurcation phenomena and adsorption phenomena of buoyant jets as well as the reasons for the occurrence of these two phenomena. It is found that the water surface has a retardation effect on dilution and promotes the bifurcation.