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ID 914
本文ファイル
別タイトル
Application of the observed rainfall data to the prediction of debris flows : A case study with the recent debris flow disaster in Hiroshima
著者
桑田 志保
キーワード
heavy rainfall
debris flow
critical line
warning-evacuation system
NDC
地球科学・地学・地質学
抄録(英)
A large number of debris flows occurred in Hiroshima Prefecture on June 29 and September 15,1999. The rainfall events as the cause of disasters were characterized in the point of extreme localization and intensity. Recently, such type of disasters has been often reported and in most of cases, the relationship between the rainfall situation and the occurrence of the debris flow disaster could not be grasped well with a rainfall observation system. We have considered the validity of this current system with some intense rainfall events and found some problems in it. One of the important points is that the observed rainfall value was not always the value of the site of the disaster. Also, several problems concerning the evaluation method of the past rainfall might be pointed out. As another very important point, we could indicate that the flow of the information transmission system was one way and that it did not function in too many necessary sites. A lot of damaged people could not have imaged a debris flow nor slope failure before the disaster. So we tried to establish an improved system. In our proposed system, the past rainfall is stored in each small district with the interpolation method. As the effect of the past rainfall on the point decreases with time, the sum is computed with a supposed attenuation constant. As the result, the rainfall situation calculated in this system is preferable to the currnet one to evaluate the possibility of debris flow. The calculation in this proposed system is not too heavy for the public to perform it with a personal computer. We can therefore expect that it contributes to increase the number of interested citizens in disaster and its prevention.
掲載誌名
広島大学総合科学部紀要. IV, 理系編
27巻
開始ページ
63
終了ページ
75
出版年月日
2001-12
出版者
広島大学総合科学部
寄与者
国立情報学研究所
作成年月日
2006-03-21
ISSN
1340-8364
NCID
SelfDOI
言語
日本語
NII資源タイプ
紀要論文
広大資料タイプ
学内刊行物(紀要等)
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
部局名
総合科学研究科
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