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タイトル: 焼岳上々堀沢における土石流の発生と規模の検討
その他のタイトル: OCCURRENCE OF DEBRIS FLOWS AND THEIR SCALES IN THE KAMIKAMIHORI VALLEY OF MOUNT YAKEDAKE
著者: 諏訪, 浩  KAKEN_name
真中, 朋久  KAKEN_name
稲庭, 篤  KAKEN_name
著者名の別形: SUWA, Hiroshi
MANAKA, Tomohisa
INANIWA, Atsushi
発行日: 1-Apr-1989
出版者: 京都大学防災研究所
誌名: 京都大学防災研究所年報. B
巻: 32
号: B-1
開始ページ: 229
終了ページ: 247
抄録: The behavior of water in the gully bottom near debris-flow source area in the Kamikami-hori valley of Mount Yakedake has been observed in order to investigate the exact relation-ship between the water movements and debris-flow occurrences. It was confirmed thatdebris flows were generated by rapid appearances of large water surges when deposits layersalready acquired a high water-content from preceeding rainfalls, but still without beingtotally saturated by water. From the analysis of rainfall data over 14 years, the surfacerunoff of water at the source point of debris flow critical to the occurrence of debris flow wasfound to change not only over years but also seasonally, owing to the changes in the topogra-phic condition of gully and in the property of gully-bed deposits. The studies on the relation-ship between the scale of debris flows in terms of their peak flow rate or total volume and thesurface runoff of water, showed the fact that the scale of debris flows were controlled first bythe rainfall intensity in short time duration and the peak flow rate of surface runoff, andsecondly affected significantly by the depositional condition in the valley.
URI: http://hdl.handle.net/2433/72158
関連リンク: http://www.dpri.kyoto-u.ac.jp/nenpo/nenpo.html
出現コレクション:No.32 B-1

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