Abstract
A development of the flap gate type breakwater, which is based on a steel flap gate in hydraulic gates with a number of adoption results, are beginning to be adopted in actual construction. The flap gate type breakwater usually lies down on a seabed and rises up through a sea surface with buoyancy when tsunami or storm surge occurs. In past studies reflected viewpoints of a large number of specialists, it has been confirmed that the flap gate type breakwater has capabilities against tsunamis. This paper describes the characteristics of the flap gate type breakwater, the expansion of utilizations in seawalls except breakwaters to reduce tsunami and storm surge disasters.
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