Pier and Contraction Scour in Cohesive Soils (2004) / Chapter Skim
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Pages 89-92
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From page 89... ...
This technique consists of using a past hydrograph, preparing the frequency distribution plot for the floods within that hydrograph, sampling the distribution randomly and preparing a future hydrograph for the required period that has the same mean and standard deviation as the measured hydrograph. This process is repeated 10,000 times and, for each hydrograph, a final scour depth (the depth reached after 75 years of flow)
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From page 90... ...
St re am flo w (m 3 /s ) Scour Depth Vs.
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From page 91... ...
St re am flo w (m 3 /s ) Predicted Scour Depth Vs.
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From page 92... ...
In other words, the predicted final depth of scour should be multiplied by 1.5 before it becomes a design scour depth. Flood-frequency curve based on Original Hydrograph (1931-1999)
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