Crest
Groynes in coastal engineering (CIRIA C793), published by CIRIA in 2020, defines a crest as the: ‘Highest point on a beach face, breakwater or seawall.’
It defines crest level/height as: ‘The vertical level of the beach relative to metres Ordnance Datum (mOD).’
And crest width as: ‘The horizontal distance measured from the back of the beach to the top edge of the beach face slope – or on a barrier beach the distance between the top of the front slope and rear slope.’
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