Hybrid Computer Model of St. Venant Equations

by Martin Oosterveld, Research Scientist; Research Station, Agriculture Canada, Lethbridge, Alberta, Canada; formerly, Grad. Research Asst., Dept. of Civ. Engrg., Univ. of Ottawa, Ottawa, Ontario, Canada,
Kazimierz Adamowski, Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Ottawa, Ottawa, Ontario, Canada,

Serial Information: Journal of the Hydraulics Division, 1976, Vol. 102, Issue 10, Pg. 1491-1501

Document Type: Journal Paper


Hybrid computers are an important tool in scientific and engineering problem solving, yet they have received little attention to date. The St. Venant equations were solved on a hybrid computer to demonstrate features of the system. The partial differential equations were reduced to ordinary ones by a continuous-space method of lines. An analog circuit was designed to solve the ordinary differential equations, with the digital performing initializing and storing duties. The computer model was calibrated and tested on data from a laboratory channel. Simulation experiments were run to test the performance of the model under steady and unsteady flow. The hybrid model has potential for reducing flow forecasting costs and computing time.

Subject Headings: Computer models | Hybrid methods | Computing in civil engineering | Differential equations | Flow simulation | Analogs | Hydraulic models | Calibration

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