Drift Ice Control for Port, Lagoon and Coast in Hokkaido

Abstract

The Okhotsk Sea coast of Hokkaido is covered with sea ice and drift ice for three or four months, theleft-lettore ships can't navigate, and ports are closed. All works the sea are discontinued completely except for the culture fishery. The drift ice which rushed into lagoons caused heavy damages to culture fishery, and marine products coastal areas of the Okhotsk Sea were damaged by the movement of drift ice. This paper describes the control techniques for drift ice movement.