豪雨発生が社会基盤施設に及ぼした被害に関する研究  [in Japanese] Investigation Regarding Impact on Social Infrastructure Damage Due to Heavy Rainfall  [in Japanese]

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Author(s)

    • 渡辺 一也 WATANABE Kazuya
    • 秋田大学大学院工学資源学研究科土木環境工学専攻 Graduate School of Engineering and Resource Science Department of Civil and Environmental Engineering, Akita University
    • 川越 清樹 KAWAGOE Seiki
    • 福島大学共生システム理工学類環境システムマネジメント専攻 Division of Environment System Management Faculty of Symbiotic Systems Science, Fukushima University

Abstract

近年増加する集中豪雨が社会基盤施設に与える影響と,今後の水管理および設計基準強化への提案を示すため,2013年8月9日に秋田,岩手県で発生した集中豪雨による鉄道盛土の流出と流木による河道閉塞の被害調査解析結果を示し,今後必要となる対策の検討を試みた.これらの被災事例は,小規模河川に接した保全重要度の高い社会基盤施設において,河積不足に関わり,被災地域の地形や土地被覆,河川上流域の土砂,斜面,樹林などの特徴によって複合的に生じた被害であり,小規模河川の整備優先度や河川改修率の低さに影響を受けていることが明らかとなった.また,今後の被害低減のためには,施設周辺の複合的要素に関する豪雨時の実績データの蓄積と,解析による知見の整備が必要であるという結論を得た.

 The purpose of this study is to investigate the effects of heavy rainfall increased in recent years on the social infrastructure, and to make a proposal on strengthening design criteria for water management in the future. Damage surveys of the outflow of the railway embankment and river channel blockage by floodwood by Akita and Iwate heavy rainfall on August 9 , 2013 are carried out. The results of the surveys and analysis are as follows; (1) The damages of social infrastructure related to the shortage of cross-sectional area of river, and caused by combined factors consist of topography and land cover of the affected area and sediment, slope and vegetation of upstream area. (2)The cases resulted from lowness of river improvement rate and development priority of small rivers. (3)To reduce damage in the future, it is necessary to accumulate data of the complex factors around the infrastructure at the time of heavy rainfall and to develop the knowledge by analysis.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 70(5), I_249-I_256, 2014

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130004707617
  • Text Lang
    JPN
  • NDL Article ID
    025864269
  • NDL Call No.
    Z74-G78
  • Data Source
    NDL  J-STAGE 
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