offshore reefs


	offshore reefs
	Advantages allow the build up of sand due to the reduction in wav energy waves break further off shore and therefore reduce their erosive power	Disadvantages may be removed by heavy storms difficult to install
	Evaluation enormous concrete blocks and natural boulders are sunk offshore to alter wave direction and to dissipate the energy of waves and tides

enormous concrete blocks and natural boulders are sunk offshore to alter wave direction and to dissipate the energy of waves and tides

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