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A Diffusion Hydrodynamic Model of a Shallow Estuary: Verification

by T. V. Hromadka, II, Boyle Engineering Corp, Newport Beach, United States,
G. L. Guymon, Boyle Engineering Corp, Newport Beach, United States,
M. H. Khan, Boyle Engineering Corp, Newport Beach, United States,
M. Collins, Boyle Engineering Corp, Newport Beach, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Many of the hydrodynamic models used for estuary tidal flows and storm surges are based on two two-dimensional hydrodynamic equations which are obtained form the full three-dimensional equations by averaging the vertical coordinates. Various numerical techniques, such as finite difference, finite element, and the method of characteristics have been used to solve these models. The Diffusion Hydrodynamic Model (DHM) has been developed to simulate two-dimensional surface water flows. In a prior study, the DHM has been applied to a deep water estuary with results comparable to those obtained using the method of characteristics. In this paper, the DHM is applied to a shallow water estuary located in southern California. The main objective is to determine local flow velocities and circulation patterns in the shallow estuary caused by the incoming and outgoing tide. Verification of the DHM is provided by comparison of tidal gauge measurements and computed flow depths.

Subject Headings: Tides | Hydrodynamics | Estuaries | Two-dimensional models | Two-dimensional flow | Hydrologic models | Three-dimensional models | California | United States

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