Steady state modeling program: Application manual
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Steady state modeling program: Application manual

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    A general methodology for modeling biological production in aquatic systems has been described in an earlier report by Canale (970). This work emphasized the transient behavior of relatively complex ecosystems in single homogeneous zones. The ultimate goal of the project was to suggest how the annual cycle of phytoplankton and nutrient behavior might be simulated mathematically. The report described the complex kinetics of the system as characterized by nonlinear reaction terms and time-variable rate coefficients. A relatively simpler class of problems is also of interest. These problems are concerned with the steady state distribution of species whose decay or production tendency can be described by first order kinetic formulations. The following list of water quality variables has been traditionally analyzed using such assumptions: 1) Total Dissolved Solids or Conductivity 2) Chlorides 3) Any Conservative Chemical Species 4) Total Coliform Bacteria 5) Dissolved Oxygen 6) Biological Oxygen Demand 7) Radioactive Isotopes 8) Nitrogen (Nitrification Process). This report describes a general user-oriented program capable of calculating the three-dimensional steady state distribution of the above water quality variables in aquatic systems.
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