A survey of the distribution of houses damaged by the 1898 debris flow in Oizumi Village, Yamanashi, and the investigation of the cause of the damage concentration

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  • 1898年(明治31年)山梨県北巨摩郡大泉村を襲った土石流による被災家屋の分布調査,ならびに被害が集中した原因についての考察
  • 1898ネン(メイジ 31ネン)ヤマナシケン キタコマグン オオイズミムラ オ オソッタ ドセキリュウ ニ ヨル ヒサイ カオク ノ ブンプ チョウサ,ナラビニ ヒガイ ガ シュウチュウ シタ ゲンイン ニ ツイテ ノ コウサツ

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Abstract

Around 1:30 am on September 7, 1898, heavy rain brought about by a typhoon caused a debris flow in Yato Area of Oizumi Village (Hokuto-city Yamanashi) at the southern foot of Yatsugatake. Consequently, 57 were killed, and 51 were injured. The author identified the locations of the damaged houses based on the “Storm Damage Investigation Report” compiled in the Meiji era and archived in the Imperial Household Agency, and the records of the land register stored in the Legal Affairs Bureau. It was found that most of the damaged houses had been located along an agricultural canal that flowed through the village. The author also compared the distribution of damaged houses in the disaster area with the results of debris flow simulations, which was made using the Hyper KANAKO system, and found that the local topographic features were the primary cause of the concentration of victims in a specific group of houses.

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