Work

Application of laboratory dam break experiments to non-impulsive wave overtopping

Year: 2024

Type: article

Abstract: This study evaluates the novel application of a laboratory dam break flume to replicate non-impulsive wave overtopping of coastal structures, without geometric scaling. The bore generated by the dam break flume is characterised and compared with overtopped bore parameters from the literature. For a more detailed wave-by-wave comparison across a broad parameter space, XBeach non-hydrostatic was used to simulate non-impulsive waves overtopping smooth-sloped coastal structures. From the XBeach dataset of individual overtopped bores, empirical relationships were derived to predict maximum water depth, velocity and flow rate using bore volume, offshore wave parameters and coastal structure parameters. Compared to the XBeach dataset, the flume bores replicate the overtopped bore flow characteristics for gentle slopes , with peak wave period s and at a distance from the crest edge m. Considering wave overtopping hazards, the flume bore maximum water depth and maximum velocity can exceed thresholds for pedestrian stability.

Source: Coastal Engineering

DOI: 10.1016/j.coastaleng.2024.104695

Authors: Joshua Bagg, Mark Battley, Colin Whittaker, Tom Shand

Institution: University of Auckland

Language: English

Topic: Coastal and Marine Dynamics

Subfield: Earth-Surface Processes

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,440

Funder: University of Auckland