有史以降の水蒸気噴火またはマグマ水蒸気噴火に関連した火山泥流

DOI Web Site Web Site 参考文献13件
  • 阪上 雅之
    国土交通省国土技術政策総合研究所土砂災害研究部土砂災害研究室 現所属：国土交通省国土地理院基本図情報部地図情報技術開発室
  • 國友 優
    国土交通省国土技術政策総合研究所土砂災害研究部土砂災害研究室 現所属：国土交通省水管理・国土保全局

書誌事項

タイトル別名
  • Historical record of lahar related to phreatic or phreatomagmatic eruption
  • ユウシ イコウ ノ スイジョウキ フンカ マタワ マグマ スイジョウキ フンカ ニ カンレン シタ カザン デイリュウ

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説明

<p>Once the volcano erupted, fallen ash accumulated on the ground flew easily even by slight rainfall and generated lahar, which sometimes caused disaster. Therefore, certain criteria are required to evaluate the possibility of lahar after the eruption. It is, however, not well understood under which process or conditions lahar were occurred in the past. For the purpose of future volcanic disaster prevention, we reviewed the historical records of the lahar in japan related to phreatic or phreatomagmatic eruption. Totally 60 records were investigated, and the process of the lahar could be classified into 12 patterns. The most frequent type was secondary lahar （triggered by rain） and the next was primary lahar （induced by hydrothermal water）. According to the research of rainfall records on four volcanoes, initial secondary lahar may be produced particularly when the rainfall rate was approximately 11-35 mm/hour which was maximum experienced hourly rainfall after the eruption.</p>

収録刊行物

  • 地質学雑誌

    地質学雑誌 123 (5), 283-289, 2017-05-15

    一般社団法人 日本地質学会

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