SAND BACK-PASSING FROM MARINE-PARK OMAEZAKI AND SHORE PROTECTION AT SHIROWA AREA

Abstract

 At the Marine-park Omaezaki constructed on the east side of Omaezaki Port, a large amount of sand transported from the Shirowa area south of the port has been deposited, whereas Shirowa area has been severely eroded. To solve the problems, a sand back-passing from Marine-park Omaezaki to the Shirowa area has been carried out. Nourishment sand, however, quickly discharged with no expected effects. In this study, beach changes at Marine-park Omaezaki and Shirowa area were investigated using aerial photographs and bathymetric survey data, and the effect and issues of the present sand back-passing system and future measures against beach erosion at Shirowa area were discussed.