SCOUR AT REAR SIDE OF A COASTAL REVETMENT DUE TO SOLITARY-LIKE WAVE OVERTOPPING

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2022-5-11

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Yaman, Mert

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Rubble mount coastal structures are commonly used for protecting coastal utilities. Under storm conditions or extreme conditions, long waves attack those structures and cause overtopping. This overtopping phenomenon often results in water flow at the back side of the structure which consequently causes scour. In this thesis, different solitary-like waves and the backfill conditions are studied to understand the level of overtopping and maximum scour depth behind the structure due to the solitary-like wave caused by overtopping. The relation between the scour and sediment characteristics, wave, and overtopping conditions are investigated and dimensionless figures are developed for the generalization of the results in the range of physical experiments. The main finding of this study is that average overtopping discharge is directly related to the maximum scour behind the revetment structure. Another finding is that grain size diameter of the backfill material and backfill height are governing parameters of scour. Moreover, it is investigated that number of overtopped solitary-like waves causes a gradual increase in scour depth for the first few attacks of solitary waves, and then the increment becomes less for the rest of the wave attacks.

Subject Keywords

Solitary Wave, Coastal Revetment, Scour

URI

https://hdl.handle.net/11511/97402

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. Yaman, “SCOUR AT REAR SIDE OF A COASTAL REVETMENT DUE TO SOLITARY-LIKE WAVE OVERTOPPING,” M.S. - Master of Science, Middle East Technical University, 2022.