Over the past two decades the application of acoustics to the measurement of small-scale sediment processes has been gaining increasing acceptance within the sedimentological community. This has arisen because acoustics has the potential to measure non-intrusively, with high temporal and spatial resolution, profiles of suspended sediment size and concentration, profiles of flow, and the bedform morphology. In the present article we review the capability of acoustics to deliver on its potentiality to make a valuable and unique contribution to the measurement of small-scale sediment processes. The article introduces the reasons for using acoustics, the physics underlying the approach, a series of examples illustrating collected data, a discussion on some of the difficulties encountered when applying acoustics and finally a look to the future and possible new developments.

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A review of acoustic measurement of small-scale sediment processes

Modified Moving Particle Semi-implicit methods for the prediction of 2D wave impact pressure

Violent breaking wave impacts. Part 1: Results from large-scale regular wave tests on vertical and sloping walls

Meetings of the Advisory Technical Committees of the International Electrotechnical Commission were held in Brussels March 27th to April 1st. The meetings were attended by delegates from eight national committees — Belgium, France, Great Britain, Holland, Italy, Spain, Switzerland, and the United States. There were about 40 delegates in all.

https://ieeexplore.ieee.org/iel5/5308791/5321388/05321395.pdf

The International Electrotechnical Commission

Long-crested wave generation and absorption for SPH-based DualSPHysics model

Shingle and mixed sand / shingle beaches are widespread in many parts of the UK and Europe. These beaches are highly efficient and practical forms of coastal protection, however a shingle beach in common with any other type of beach, can suffer erosion and subsequent landward retreat of the shoreline. Consequently over a period of time a beach
which was originally of satisfactory dimensions may be reduced to such an extent that it no longer constitutes an
acceptable ‘line of defence’. Anticipating this state is clearly important if shingle beaches are to be managed effectively, and landward structures are not to be damaged by flooding.
The classical dynamic equilibrium shingle beach profile has been described using the parametric model of Powell (1990). In theory, a dynamic equilibrium profile should develop for any given combination of wave conditions assuming that there is sufficient time and sediment available for the profile to form. This limitation means that the model is not valid for the prediction of overwashing and breaching of shingle barrier beaches.
However it has been used to estimate profile performance in
these circumstances (Buijs et al., 2005).
An empirical framework, based on extensive fieldwork and physical model data was developed to predict the threshold for breaching of shingle barrier beaches (Bradbury, 2000). The field and model data used to develop the model related only to the shingle barrier at Hurst Spit.
Bradbury et al (2005) found that model did not work so well
when applied to other sites and concluded that use of the
model outside the valid predictive range would result in the
under prediction of overwashing.
Further data was therefore required to test and extend the range of validity of the Bradbury model.

A laboratory study of overtopping and breaching of shingle barrier beaches

https://backend.orbit.dtu.dk/ws/files/127446530/1_s2.0_S1876610216308657_main.pdf

Charlotte Obhrai

Papers

Violent breaking wave impacts. Part 1: Results from large-scale regular wave tests on vertical and sloping walls

A laboratory study of overtopping and breaching of shingle barrier beaches

DeRisk - Accurate prediction of ULS wave loads. Outlook and first results

Violent wave impacts on vertical and inclined walls: large scale model tests

CFD simulations of violent breaking wave impacts on a vertical wall using a two-phase compressible solver