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Comparison of DAMBRK With DWOPER for Computing Water Surface Elevations at Stream Junctions

by Philip A. Burns, US Army Corps of Engineers, United States,
Margaret M. Burns, US Army Corps of Engineers, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The National Weather Service computer programs DWOPER (Operational Dynamic Wave Model) and DAMBRK (Dam-break) are one-dimensional models using an implicit finite difference method of solution for the complete one-dimensional equations of unsteady flow, the Saint-Venant Equations. With DAMBRK, only one stream may be modeled; lateral inflows are represented by discharge hydrographs and are treated as internal boundary conditions. This paper explores different methods by which DAMBRK may be applied to obtain the most accurate results and identifies the errors in stage computation for an example case. The accuracy of the results is based on the results obtained by DWOPER, since that model includes the sophistication to model stream junctions.

Subject Headings: Computer models | Rivers and streams | Flow profiles | Water surface | Unsteady flow | River flow | Model accuracy

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