Assessment of Work Period Necessary for Removal of Fallen Pumice from Navigation Areas for Continuity of Port Business Following a Large-Scale Volcanic Disaster

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  • ASANO Toshiyuki
    Research and Education Center for Natural Hazards, Kagoshima University
  • TAKAHASHI Shinobu
    Research and Education Center for Natural Hazards, Kagoshima University
  • KAI Shinji
    Kagoshima Port & Airport Development Office, Kyushu Regional Development Bureau, MLIT

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Other Title
  • 大規模火山噴火災害時における港湾機能維持に必要な降下軽石群の揚収作業量の分析
  • ダイキボ カザン フンカ サイガイジ ニ オケル コウワン キノウ イジ ニ ヒツヨウ ナ コウカ カルイシグン ノ ヨウシュウサギョウリョウ ノ ブンセキ

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Abstract

For most major ports in Japan, a business continuity plan (Port-BCP) has been developed to cope with potential functional disorder in port operations caused by natural disasters. The objectives of a Port-BCP are to maintain the minimum vital activities, such as transportation of emergency supplies, and to enable resumption of normal operations within a reasonable period. Existing Port-BCP plans, however, focus only on earthquake and/or tsunami disasters and do not consider volcanic events. This study assessed the impact of predicted pumice fall on Kagoshima Port (Japan) following a supposed large-scale eruption by the adjacent Sakurajima volcano. Numerical simulations were conducted with varying conditions of wind velocity and direction to estimate the volume and mass of pumice deposited in Kagoshima Bay. Based on the results, estimations were performed regarding the work period required to remove the deposited pumice from the navigation areas.

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