Topographic changes of Fujimori and Tochiyama River mouths caused by beach erosion and new river mouth improvement

Abstract

Topographic changes associated with beach erosion around the Fujimori and Tochiyama River mouths located on the Suruga coast were investigated by using aerial photographs and beach survey data. Shoreline recession around these river mouths is very severe and high berm closed the river channel to cause water level rise in the upstream of the river. A new method to prevent forming high berm is proposed by installing wave dissipating breakwater in front of the river mouth