A Laboratory experiment of wave overtopping over dike on steep fringing reef

Ho Duc  Dat; Nguyen Quang  Tao; Nguyen Trung  Dung; Nguyen Van  Bau; Mai Cao  Tri; Dinh Quang  Cuong

doi:10.6180/jase.202507_28(7).0010

A Laboratory experiment of wave overtopping over dike on steep fringing reef

Ho Duc Dat, Nguyen Quang Tao, Nguyen Trung Dung, Nguyen Van Bau, Mai Cao Tri, and Dinh Quang CuongThis email address is being protected from spambots. You need JavaScript enabled to view it.

Faculty of Coastal and Offshore Engineering, Hanoi University of Civil Engineering, Hanoi, Vietnam.

Received: March 5, 2024
Accepted: July 22, 2024
Publication Date: October 7, 2024

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202507_28(7).0010

This paper presents a laboratory study to investigate the wave overtopping over dike on the fringing reef with a large steep fore-reef slope. The experimented models were set up in wave flume, considering three different slopes of dike combined with various wave and still water levels and different roughness cases. The research results indicate that wave overtopping over a dike on the fringing reef depends not only on the relative crest freeboard but also on a synthetic parameter typical for the wave hydrodynamic properties of the fringing reef characteristics and the slope of the dike. An empirical equation of wave overtopping discharge for dike on the fringing reef was derived based on an equation in EurOtop2018 by adding new synthetic parameter, and the comparison of the data from the new empirical formulas with the measured data showed good agreement. The proposed equation of this paper has been applied to estimate wave overtopping discharge over dike on the fringing reef having a large steep fore-reef slope.

Keywords: dike, steep fringing reef, overtopping wave, wave flume, empirical formula.

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