2021 Volume 77 Issue 2 Pages I_595-I_600
Beach nourishment using 8×104 m3 of gravel has been carried out at Akiya (Okuzure-hamada) area between 2007 and 2014. After the nourishment, a wide beach was recovered, but a steep beach was formed as well as the formation of high berm of 3 m above mean sea level. Since the relative height between the crown of the seawall and gravel beach was reduced, part of gravel was transported to the backyard of the seawall. Part of gravel was also transported into the sandy beach across a L-shape groin, damaging use of sandy beach as a bathing beach. Therefore, beach changes between 2005 and 2019 were reproduced using the BG model, and future beach changes were predicted. Measures preventing gravel transportation into the adjacent sandy beach and wave overtopping over the seawall were proposed.
PROCEEDINGS OF COASTAL ENGINEERING, JSCE
PROCEEDINGS OF THE JAPANESE CONFERENCE ON COASTAL ENGINEERING
