Pier and Contraction Scour in Cohesive Soils (2004) / Chapter Skim
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Pages 89-92
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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... ...
For each hydrograph, the SRICOS program generates a scour depth history, including a final depth of scour, d, at the end of the project life. These values of the final depth of scour can be organized in a frequency distribution.
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From page 91... ...
Probability distribution of scour depth, d, for different lengths of the project life, Lt. Figure 11.5.
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From page 92... ...
One useful approach in this respect is to conduct a sensitivity analysis by varying the input parameters and monitoring the impact of the parameter variation on the final scour depth. This would help in realizing how important each parameter is and give a range of scour depth values.
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