Quantifying the Effect of Bed Permeability on Maximum Wave Runup

Abstract

The magnitude of the wave runup is based on a number of contributing factors that have been the subject of numerous studies and a variety of research activities. Consequently, several parametric formulations already exist that can estimate runup magnitude in a variety of coastal conditions. However, the effect of swash-swash interaction and swash infiltration is not explicitly quantified in these existing parametric formulations. The current research aims to elucidate on one key aspect, namely, the effect of bed permeability on swash magnitude. Specifically, the aim is to find a relationship between infiltration rates and the maximum runup on the beach face. A series of experiments were performed at the Coastal Flume located at UCL, London, UK to characterize this effect of bed permeability on wave runup magnitude. The results from the series of experiments conducted favour a Hunt-type runup formulation and indicate that there is a clear relationship between bed permeability and the maximum wave runup. Other complicating factors make comparison to existing parametric formulations difficult and these will be discussed fully in the main paper.

RETRACTED: Wave Run-Up and Surface Stress on a Permeable Coastal Bed

“…Villarroel-Lamb et al (2014) [5] conducted the series of experiments through a Hunt-type run up formulation and indicated that there is a clear relationship between bed permeability and the maximum wave run-up. Hughes (2004) [6] developed a study to provide an estimation technique that was as good as existing formulas for breaking wave run-up and better at estimating nonbreaking wave run-up.…”

Evaluation of Wave Run-Up Predictions From Parametric Models on Trinidad Beaches

“…In 2014, Villarroel-Lamb et al [14] conducted a series of laboratory tests in a coastal flume at the University College London (UCL) London, UK to investigate the influence of bed permeability on maximum wave run-up. Four angles of beach slopes; 9, 11, 13 and 15 degrees were used along with 4 degrees of bed permeability; 0.311, 0.105, 0.401 and 1 x 10 -8 ms -1 , the latter representing an impermeable bed similar to that of clay.…”