Deposition is also being managed at North Cronulla beach. Dune stabilization is being used to prevent deposited material from being eroded away. The plants hold the dunes together with their roots, fences ensure that the plants will not be trampled by pedestrians, ploy-mesh fencing holds deposited sand so that it will not be eroded away, and planked walkways also prevent sand from being eroded. After the erosion of Cronulla beaches in 1974, the University of New South Wales designed a new wall. It is made up primarily of interlocking hexagonal concrete blocks which way about a tonne each, which are called 'sea bees'. ...read more.
This method was used because it helps to build up the beach and to minimize erosion. At Wanda