2021 Volume 77 Issue 2 Pages I_451-I_456
Artificial reefs with a crown width of 70 m and a crown depth of 1.3 m were constructed with an opening of 40 m width on the Agarie coast in Nago City, Okinawa, to reduce wave overtopping. Three impermeable groins of 100 m length were additionally constructed concurrently with beach nourishment using sand of median diameter of 0.6 mm. After the construction, beach was eroded due to storm waves associated with typhoons. Beach changes of this beach were investigated using the BG model (a model for predicting three-dimensional beach changes based on Bagnold’ concept). It was concluded that the sand discharge of this coast was triggered by the outflow of nourishment sand through the openings of artificial reefs with 3 m depth.
PROCEEDINGS OF COASTAL ENGINEERING, JSCE
PROCEEDINGS OF THE JAPANESE CONFERENCE ON COASTAL ENGINEERING
