蓄水池和蓄水池中滞留时间长，混合不当，可能会对水质产生负面影响。混合和水质动态的数学和物理模型可用于确定运行政策的替代设计如何影响设施内和设施外的水质。三个模型——一个系统模型，使用水库的简化表示，强调设施的输入和输出，一个基于数学方程的计算流体动力学模型，以及水库的物理比例模型——被应用于Ed Heck水库，一个位于加利福尼亚州阿祖萨的400万加仑圆柱形水库。每种模型的应用结果都以图形方式呈现，并讨论了每种模型的优点、缺点和成本。包括4个参考文献、图表。

Long detention times and improper mixing in tanks and reservoirs may negatively affect water quality. Mathematical and physical models of mixing and water quality dynamics may be used to determine how alternative designs of operational policies affect the quality of water within and leaving the facility. Three models--a systems model that uses a simplified representation of the reservoir emphasizing the input and output from the facility, a computational fluid dynamics model based on mathematical equations, and physical scale models of the reservoir--were applied to the Ed Heck Reservoir, a 4-million-gallon cylindrical reservoir in Azusa, California. Results of the application of each model are presented graphically along with a discussion of each model's advantages, disadvantages, and costs. Includes 4 references, figures.