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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Scour at breakwaters under combined waves and current
Scour at breakwaters under combined waves and current
Author : STEFAN CARSTENSEN(1), B. MUTLU SUMER(2)
ABSTRACT
Bed profiles perpendicular to breakwater have been measured for orthogonal combined wave and current scour. The bed
profiles show the distinct features of the wave scour forming due to the presence of recirculating cells, namely
deposition/scour at the antinodes/nodes depending on whether the sediment transport occurs in the no-suspension or
the suspension mode. Also, the current scour which forms by the presence of secondary flow as a result of the corner
flow and the change in roughness is noticeable in the bed profiles. The mechanism of scour in both the fundamental
cases (waves alone and the current alone) is that the sediment is mobilized by the primary flow while the secondary
flow/recirculating cells cause a mean transport of sediment, leading to scour. For the orthogonal combined wave and
current the mechanism appears to be similar.
File Size : 1,257,739 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 17/08/2015
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