armour layer 15 and 85 percentile sieve sizes

A model for the grading of the scour protection armour layer as a function of its median rock size: d_15 = 0.8⋅d_50 and d_85 = 1.2⋅d_50.

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Notes

This node's name is a non-informative reference to a model in Zaaijer (2013); it should get an informative name.
2026-09-09: name, description changed — Table D-1, row "d15 and d85 of armour layer as function of d50", under Rocks. The published name was the table's row number, which the node's own note asks to replace; the description now carries the equation, which the new name would otherwise only restate.

References

PhD Thesis 'Great expectations for offshore wind turbines'. Michiel Zaaijer, 2013

Contributed by

S. Sanchez Perez Moreno (TU Delft), Edited by S. Sanchez Perez-Moreno (Anemona)

Cite the database: Quaeghebeur, E., Sanchez Perez-Moreno, S., and Zaaijer, M. B.: WESgraph: a graph database for the wind farm domain, Wind Energ. Sci., 5, 259–284, 2020. doi:10.5194/wes-5-259-2020

This page: https://wesgraph.anemona.io/concept/armour-layer-15-and-85-percentile-sieve-sizes/