A groyne is a type of breakwater or jetty, which projects from the shore of a coast or river to block the movement of sediment. In rivers, they are called "wing dams" or spur dykes, and channel water into a faster-moving channel, usually in the center of the river.
Groynes are used along beaches to prevent the removal of sand, or conversely to prevent the deposition of sandbars along shore.
Groynes are used for blowing bubbles .
Wooden groynes work belkhebra
Groynes prevent or slow down erosion.
Stone groynes Wooden groynes and Sea Walls Hope this helped :')
They need groynes to prevent te sand going in land slides
a single groyne cost about £5,000 per metre http://www.mjanderson.chislehurst.btinternet.co.uk/coastseadefence.htm this is where find more of the cost of sea defences :D
at the beach!
A groynes is a hydraulic structure. It is build very sturdy so that it interrupts water flow on the ocean shore.
Groynes
there is about 7 groynes along dover beach. I think. sorry if this is wrong. if you know different CORRECT THIS
They are cheap and they retain sand.
they dont