土石流の流動を抑制した自然的要因についての考察
この文献の参照には次のURLをご利用ください : http://doi.org/10.15027/151
ID | 151 |
本文ファイル | |
別タイトル | Consideration of the natural factors in which the flow behavior of debris flows could be controlled
|
著者 |
古澤 英生
|
キーワード | coefficient of friction
debris flow
fluidity
|
NDC |
地球科学・地学・地質学
|
抄録(英) | It is very important for the disaster prevention to analyze the factors which influenced on the fluidityof debris flow. We investigated such factors in debris flows occurred around Higashi-Hiroshima in 1999. Weadopted equivalent coefficient of friction and dynamic coefficient of friction to evaluate the fluidity of thedebris flows. As the result of consideration with obtained data, the following things were elucidated: (1) Debrisflow which occurred in the torrent with larger catchment area tends to have large fluidity. (2) In case of eachtorrent, as debris flow moved downwards, dynamic coefficient of friction became smaller. (3) Debris flowstended to lose their fluidity at the places where there were trees, agricultural ponds and tortuosity of the channeletc. (4) The proportion of area occupied by trees is more suitable than the number density of trees as factorsinfluenced on the fluidity of the debris flow. When the proportion of area occupied by trees would becomegreater than some per mills, debris flows at such site could be controlled by the trees.
|
掲載誌名 |
広島大学総合科学部紀要. IV, 理系編
|
巻 | 28巻
|
開始ページ | 49
|
終了ページ | 60
|
出版年月日 | 2002-12
|
出版者 | 広島大学総合科学部
|
寄与者 | 国立情報学研究所
|
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
|
他の一覧 |