10 Questions
What is the purpose of performing tests at different scales?
To validate the piping rule in formula
How was the piping rule extended based on the small-scale tests?
By accounting for the role of relative density, uniformity, and angularity
What is the preliminary hypothesis regarding the role of particle diameter?
Smaller particles are better suited for a 2D erosion field approach
How was the influence of particle diameter accounted for in the small-scale tests?
Through the particle exponent derived from multivariate analysis
Which statement is true about the IJkdijk tests 1 and 3?
They were performed with fine sand, having a $d_{70}$ of $180 \mu m$
How well did the predictions by formula match the outcome of the backward erosion tests?
The predictions agreed well with the fine-tuning tests, but deviated for the coarse sand test.
What factor appeared to play an important role in the formula for predicting critical head?
The scale factor
How does the new piping rule presented in the text differ from the current rule?
It includes the influence of relative density, uniformity, and particle roundness.
For what type of sand did the new piping rule perform well in predicting the outcome of the IJkdijk tests?
Fine sand
What is the presumed reason for the difference in behavior between fine and coarse sands during the erosion process?
Fine sands develop as a front, while coarse sands tend to erode in smaller strips.
Explore the validation tests conducted at different scales to validate the piping rule in formula. Learn about small-scale, medium-scale, and large-scale experiments used for calibrating the piping rule and extending it based on factors like relative density, uniformity, and angularity.
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