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Percentage of time the Shields parameter exceeds 0.25

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Created 13/01/2025

Updated 13/01/2025

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This data represents the percentage of time the Shields parameter (Shields, 1936) exceeds 0.25. The Shields parameter (non-dimensional bed shear stress) value of 0.25 is assumed to be the threshold for creating disturbed patches on the seabed. This value is several times larger than that required to initiate traction bedload transport (~0.05) and falls in the middle of the ripple and dune bedform stability field. It represents conditions when the seabed is highly mobile and where patches of disturbed habitat are likely to be created. Shields, A. 1936. Application of similarity principles and turbulence research to bed-load movement. Mitteilunger der Preussischen Versuchsanstalt f¨ur Wasserbau und Schiffbau 26: 5-24

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Field Value
Title Percentage of time the Shields parameter exceeds 0.25
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/131bcf45-da19-42e8-8094-3e856aef3d73
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
Data Portal Data.gov.au