Scour at Wide Piers and Long Skewed Piers (2011) / Chapter Skim
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Pages 8-15
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From page 8... ...
were included in the field data set. Equilibrium Local Scour Data Relatively large quantities of equilibrium local scour data have been published (943 field and 569 laboratory data points)
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laboratory data were discarded due to the short durations of the tests (from 4 to 6 h) , which were significantly less than that required for the development of equilibrium scour depths.
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Figure 3. Dimensional plots of field local scour data.
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Plots of normalized field local scour data.
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From page 12... ...
Most of the outliers had V1/Vc values less than 0.8 and very large equilibrium scour depths. This methodology could not be used to determine outliers in the field data because it was not known if the measured scour depths were equilibrium values for the specified flow, sediment, and structure conditions.
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From page 13... ...
Figure 8 shows the similarity in their a/D50 values. Figure 8 shows that the Mueller and Wagner data and Froehlich data have larger values of y1/a than that from the Amu Darya River site and therefore should have greater scour depths.
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From page 14... ...
The effective diameter is the diameter of a single circular pile that will experience the same local scour as the complex pier under the same flow and sediment conditions. This approach seems to work well for equilibrium scour depths for the limited data that exist.
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Plots of the data for local scour evolution rates.
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