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Two draft chapters for a volume of the series, A Water Quality Simulation Model for Well-Mixed Estuaries and Coastal Areas. Model development combined the techniques of systems analysis and computer science with those of instrumentation and data collection, and the concepts of hydraulic engineering, physical oceanography, and meteorology with those of sanitary engineering. A computer graphic approach was essential. Movies computer-produced from the graphical output have been very effective in understanding both the dynamic behavior of the estuary or coastal sea and the computational process. Unexpected simulation results provided leads to the actual physical and biochemical processes involved. Many surges and seiches observed in Jamaica Bay could also be found in its simulation, and the Kolmogorov spectrum for three-dimensional turbulence was indeed present in the model and in the prototype. As in the previous studies, this paper assumes an understanding of tidal hydraulics, estuarine analysis, and finite difference mathematics. (See also R-708, R-709, RM-6230.)

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