暴波浪による構造物周辺の海浜地形と底質の変化

抄録

The study area has been suffered from intensive retrogression of the coastline since early 1990's. Numerous coastal structures have been built and nourishments have been performed for protection and preservation of the coastline, however, it has not become a fundamental solution so far. It is very important to evaluate effects of countermeasure works of coastal erosion. We examined the effect of these structures on the basis of changes on beach topography and also facies change of sediments around these coastal structures at before and after a storm. Examination of airphotos during last 13 years are also studied and help our understanding of the erosion.