Research on trend of ship evacuation behavior when Tsunami warning

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  • 津波警報発令時における湾内の船舶の避航・避泊行動に関する調査研究
  • 津波警報発令時における湾内の船舶の避航・避泊行動に関する調査研究[含 質疑応答]
  • ツナミ ケイホウ ハツレイジ ニ オケル ワン ナイ ノ センパク ノ ヒコウ ヒハク コウドウ ニ カンスル チョウサ ケンキュウ ガン シツギ オウトウ

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Abstract

External forces of marine weather, such as waves, currents and wind flows, affect the course and speed of a ship under way. As a result, marine accidents, such as collisions or grounding, may occur, particularly in inshore areas. On coasts where earthquakes and tsunamis occur frequently, such as the Japanese coast, a tsunami that advances into a bay from the open sea is influenced by the submarine topography. It grows into a huge wave that could cause tremendous damage to ships under way and at anchorage. A massive earthquake occurred in the Tohoku and Kanto regions of Japan on 11 March 2011. In response, a tsunami alert, a tsunami warning and an advisory were issued for the entire Pacific coast region. This research investigates the evacuation behaviour of ships by AIS data in Tokyo bay and Osaka bay after the tsunami warning was issued. The unusual behaviour observed was attributed to the emergency evacuation of ships. In addition, the propagation direction of the tsunami was clarified by analysing the drift situation of each ship.

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