Sediment accretion method

摘要

Apparatus for controlling movement of sediment in water adjacent a shore comprises a structure (12) erected on an underwater substrate. The structure (12) has a substantially convex horizontal profile extending around its periphery to produce reflected wave crests (19) from incident wave crests (11). The structure (12) has a horizontal width of no more than about four times the average incident wavelength and no less than about half the average incident wavelength.