St. Venant-Exner Equations for Near-Critical and Transcritical Flows

St. Venant-Exner Equations for Near-Critical and Transcritical Flows

The solution of the St. Venant-Exner equations as a model for bed evolution is studied under conditions when the Froude number, F, approaches unity, and the quasi-steady model becomes singular. It is confirmed that the strict criterion for critical flow, the vanishing of a water surface disturbance...

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Veröffentlicht in:Journal of hydraulic engineering (New York, N.Y.) N.Y.), 2002-06, Vol.128 (6), p.579-587
Hauptverfasser: Lyn, D. A, Altinakar, M
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Buildings. Public works
Earth sciences
Earth, ocean, space
Exact sciences and technology
Hydraulic constructions
Hydrology
Hydrology. Hydrogeology
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Zusammenfassung:The solution of the St. Venant-Exner equations as a model for bed evolution is studied under conditions when the Froude number, F, approaches unity, and the quasi-steady model becomes singular. It is confirmed that the strict criterion for critical flow, the vanishing of a water surface disturbance celerity, is not met, yet the direction of propagation of a bed wave apparently changes depending on whether F>1 or F
ISSN:0733-9429
1943-7900
DOI:10.1061/(ASCE)0733-9429(2002)128:6(579)