Groynes
Groynes in coastal engineering (CIRIA C793), published by CIRIA in 2020, defines a groyne as a: ‘Narrow, roughly shore-perpendicular structure built to reduce or divert longshore currents and/or to trap and retain beach material. Most groynes are of timber or rock, and extend from a seawall, or the backshore, well onto the foreshore and rarely even further offshore.
It defines groyne efficiency as: ‘The fraction of the unconstrained instantaneous longshore sediment transport past a groyne which is retained by the groyne. This efficiency may reduce with time as the groyne deteriorates or as the groyne bay fills.’
Where a groyne bay is the compartment between two groynes.
And a terminal groyne as the: 'Last groyne at the downdrift end of a groyne field. This groyne will need to be a substantial structure to remain stable given the (potentially significant) erosion downdrift.'
[edit] Related articles on Designing Buildings Wiki
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Undervaluing our industrial past
Heritage value changes as taste for building styles changes.
Changing expectations around competence and compliance
New information sheet from CIAT.
Grenfell investigation files passed to CPS
Angela Rayner apologises on behalf of the British state.
Electrical contractors need to understand the practical implications.
The real barrier to getting more value from digital technology.
Your guide to The Construction Reset at UKCW Birmingham.
Accommodating the Victorian and Edwardian working woman. Book review.
Rethinking passive fire protection in design
PFP demands the same level of design rigour as structure or services.
38% of Gen Zs feel safe when a fire door is wedged open.
Stunning images from around the world
Shortlist for CIOB’s Art of Building photography competition.
Guidance for conversion of traditional pre-1919 stone buildings.
Industrial heritage in the Ruhr
A marked difference to the fate of industrial landscapes in the UK.