采用微分方程几何理论分析河流综合水质模型的基本方程，探讨了河流综合水质模型的平衡状态解的求解方法，并给出相关计算公式。
Aiming at the solving problem of equilibrium solution of this nonlinear model, geometry theory of differential equations is adopted, and the relative calculation formula is given.
QUAL2E模型，该模型是美国国家环境保护局（US EPA）推出的一个河流综合水质模型，该模型具有综合性、多样化和灵活通用的特点，是进行河流水质定量模拟的有力工具。
QUAL2E was released by USEPA as a comprehensive and versatile stream water quality model. QUAL2E can be used as a powerful tool for stream water quality quantitative simulation.
该模型应用于某河流断面的水质综合评价，得到比较合理的结果。
The model has been applied to water comprehensive assessment of a certain river and reasonable conclusion was drawn.
该模型应用于某河流断面的水质综合评价，得到比较合理的结果。
The model has been applied to water comprehensive assessment of a certain river and reasonable conclusion was drawn.
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