COMPREHENSIVE COASTAL MANAGEMENT FOR SHIZUOKA AND SHIMIZU COAST, JAPAN
Shizuoka and Shimizu Coast (about 18km long), which is located on the west side of Suruga Bay, is a sand and gravel coast of outstanding longshore sediment transport rate. At the mouth of Suruga Bay it reaches 2,500km deep,which makes it the deepest bay in the national waters of Japan. The coast used to be a fine coast well known for its beautiful scenery of Mt. Fuji and pine trees, as well as an old Japanese fable ‘Hagoromo-densetsu’ (A tale of “Robe of Feathers) in which Ten-nyo (an angel from heaven) is bathing herself in the coast. However, over a period of 40 years between 1948 and 1987, about 80m of shoreline retreat had been caused by high waves and decreasing sediment supply from the Abe River, the main source of sediment transport. As a counter measure, over a 15-year period from 1977, 70 detached breakwaters were constructed along the Abe River from the river mouth up to the point 10km east. But still erosion spread on the east side. With that, for the next 10 years from 1990, 5 pairs of headland, each pair of which consists of 2 detached breakwaters, were installed toward east from the 10km point. Along with that, about 80,000m 3 of gravel per year have been added into the Abe River. As a result of that, erosion is on the wane and sedimentation have come to be partly seen. In this paper,we will examine from the technical aspect the effectivenes of each coast preservation method such as detached breakwater, headland, and sandbypass.
Kazunori WADA
Disaster Management Informatics Research, Ehime University, 3 Bunkyo-cho atsuyama-city, 790-8577, Japan
国际会议
第四届亚太地区海岸会议(the Fourth International Conference on Asian and Pacific Coasts)
南京
英文
2007-09-21（万方平台首次上网日期，不代表论文的发表时间）