Increasing Computational Accuracy of Radial Gate Flows

by Brian Henning,
Timothy F. Kacerek,

Document Type: Proceeding Paper

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


Radial (Tainter) gates are the most widely used flow control structure on large, open channel conveyance systems. In contrast, the hydraulic forces are complicated and this type of gate Is arguably the most difficult to consistently and accurately compute flow. This paper discusses the ongoing research and development of analyzing discharge coefficients and experimental versions of the orifice equation to Improve the accuracy in computing radial gate flows. Included is a new procedure to routinely and efficiently calibrate discharge coefficients along with an algorithm that uses a modified orifice equation to compute accurate gate flows without requiring extensive processing time and complicated computer models. This new algorithm was developed using telemetered field data, over a 6 year period, from 39 check structures on the Central Arizona Project aqueduct system.

Subject Headings: Gates (hydraulic) | Water discharge | Radial flow | Computer models | Algorithms | Water supply systems | Model accuracy | Arizona | United States

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