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Simulation of Dissolved Oxygen in Sacramento-San Joaquin Delta

by Haridarshan L. Rajbhandari, (S.M.ASCE),
Gerald T. Orlob, (F.ASCE),
Francis I. Chung, (M.ASCE),



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

A one-dimensional model has been developed to simulate water quality in a complex multi-channel estuarine system. The model utilizes a Lagrangian reference frame for transport computations. Governing equations for water quality variables are based on the first order kinetic principles and utilize the interconstituent relationships derived from the recent literature. Based on a flow field generated by an independent unsteady-state hydrodynamic model, the model performs advective and diffusive steps of mass transport. Changes in masses of constituents due to decay, growth and biochemical transformation are simulated. A preliminary evaluation of the model was accomplished by applying it to simulate dissolved oxygen balances in the Sacramento-San Joaquin Delta in California. The initial study focused on a reach of San Joaquin River near the City of Stockton where dissolved oxygen concentrations were affected by waste water discharges. Results of this application and future areas of research are discussed.

Subject Headings: Dissolved oxygen | Water quality | Mass transport | Simulation models | Hydrologic models | Estuaries | Computer models | California | United States

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