Author(s): A. J. Johnston

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Abstract: This paper investigates the scourhole developed by a plane jet entering shallow tailwater conditions. Through dimensional considerations and physical reasoning, the appropriate functional groups are identified. Experimental laboratory results are then used to evaluate the functional relationships and show that in shallow conditions, the jet can produce three very different scourhole regimes. Two are propagated where the jet permanently attaches itself to either the bed or the free surface boundary whilst the third is produced when the jet periodically flicks between the free and solid bed boundaries. Results are presented to illustrate the different hydraulic processes which are active during this unusual scourhole development.

DOI: https://doi.org/10.1080/00221689009499074

Year: 1990