Time Scale for Scour Downstream of Hydraulic Jump

by Javad Farhoudi, Lect. in Hydr. Struct.; Univ. of Urmia, Urmia, Iran,
Kenneth V. H. Smith, (M.ASCE), Lect. in Hydr. Engrg.; Univ. of Southampton, Southampton, England,

Serial Information: Journal of the Hydraulics Division, 1982, Vol. 108, Issue 10, Pg. 1147-1162

Document Type: Journal Paper


Scour downstream a hydraulic structure takes time to develop. Therefore, for a river in which peak flows are of short duration, the time history of scour development is of major importance. The paper briefly describes the work of Breusers on the time scale of local scour downstream of estuary closure structures and then extends it by reference to a program of experiments to the case of local scour downstream a hydraulic jump. The paper includes an example calculation of the determination of the time scale between a model and prototype overflow weir with plunge-type dissipator, subject to scour downstream.

Subject Headings: Scour | Rivers and streams | Hydraulic jump | Drop structures | Flow duration | Peak flow | River flow | History

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