Submerged Flow in Parshall Flumes

by Hilaire Peck, US Bureau of Reclamation, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


Recent data collected in a 1-foot Parshall flume located in the Bureau of Reclamation's hydraulic laboratory indicate a significant discontinuity in the discharge/submergence relationship. There is a range of submergence over which two values of discharge can occur for the same submergence and upstream head. The data indicate errors as large as 12 percent can occur between the actual discharge and the discharge calculated by Parshall's method. A free flow equation and two equations that correct for submergence effects were developed. An equation was developed for each side of the discontinuity in the submerged zone.

Subject Headings: Submerged flow | Submerging | Flumes | Fluid flow | Flow measurement | Discontinuities | Free flow | Water flow

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