2011 Volume 67 Issue 4 Pages I_1687-I_1692
A setting-back of coastal dike to protect the wetland was carried out in 2004 near the mouth of the Maite River flowing into the Nakatsu tidal flat. Monitoring surveys, such as beach surveys and investigations in coastal vegetations, had been carried out between 2005 and 2009 after the setting-back.During the observation period, Typhoon No. 5 attacked the coast on the 2nd of August in 2007, resulting in the increase in tide level up to DL+4.7 m, which is a maximum since 2000. Due to the storm surge,shoreward sand transport occurred and a high berm with a height of 5.02 m was formed with the recession of the foreshore by 5 m. No changes were observed in the wetland and its environment was maintained despite the storm surges, suggesting that the setting-back is useful for protecting the wetland against storm surge.
PROCEEDINGS OF HYDRAULIC ENGINEERING
