Counter Measures for Debris and Flood Flows Disasters by Using Natural Woods

利用天然木材防治泥石流灾害

• 批准号: 10555176
• 负责人: HASHIMOTO Haruyuki
• 金额: $ 4.74万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555176/
• 关键词: Trees; Woods; Debris Flows; Flood Flows; Sediment Flows; Natural Disasters; Natural Environments; Landscape

Natural woods along the rivers and at the base of mountains have been used as the counter measures for flood and debris flows disasters. Recently, the roles of woods is noticed form the point of natural environments. It is important in river management work to take into account the influence of trees in the flow.The results obtained in this study are as follows :(1) Transport rate of bed and suspended loads were investigated in an open channel with cylinders installed across the whole channel width. The cylinders were placed in stagger with their equal spacing on the bed. Measurements of their transport rate agree with that without cylinders by using effective frictional velocities.(2) Drag forces on a single cylinder of the model woods was measured in this open channel. It is found that drag coefficient of a single cylinder in the model woods becomes larger than that in a uniform flow without woods.(3) Critical conditions for break of trees were investigated by using the debris-flow disaster reports.

沿着、山脚天然林已被用作洪水和泥石流灾害的防治措施。近年来，人们从自然环境的角度来关注森林的作用。本文主要研究结果如下：（1）在全宽设置圆柱体的明渠中，研究了床沙和悬移质的输沙率。圆筒在床上等间距地交错放置。用有效摩擦速度测量了它们的输运速率，结果与无圆柱时的结果一致。(2)在明渠中测量了模型木材的单个圆柱体上的拖曳力。结果表明，在模型树林中单个圆柱的阻力系数比无树林均匀流中的阻力系数大。(3)利用泥石流灾害报告资料，研究了树木折断的临界条件。

项目成果

林 建二郎、木村保夫、鈴木正幸、萩原運弘、重村利幸: "湖沼における植生護岸の形成とその効果"海岸工学論文集. 46. 1116-1120 (1999)

Kenjiro Hayashi、Yasuo Kimura、Masayuki Suzuki、Unhiro Hagiwara、Toshiyuki Shigemura：“湖泊和沼泽植被保护的形成及其影响”海岸工程杂志 46。1116-1120（1999）。

Haruyuki Hashimoto, Hiroshi Takabata, Takahumi Hibako and Kichan Park: "SUSPENDED-LOAD DISTRIBUTION IN AS OPEN CHANNEL FLOW WITH MULTIPLE CYLINDERS"Annual Journal of Hydraulic Engineering, JSCE. Vol. 44. (2000)

Haruyuki Hashimoto、Hiroshi Takabata、Takahumi Hibako 和 Kichan Park：“多缸开放通道流中的悬荷分布”水利工程年度期刊，JSCE。

橋本晴行、高畑 洋、火箱貴文、Kichan Park: "樹林帯を伴う急勾配水路における浮流砂濃度分布に関する研究"水工学論文集. 44(印刷中). (2000)

Haruyuki Hashimoto、Hiroshi Takahata、Takafumi Hibako、Kichan Park：“森林带陡坡水道中浮沙浓度分布的研究”水利工程学报 44（出版中）。

Yoshiharu Ishikawa: "Damage to forests by sediment movements and control of sediment movements by forests"Interpraevent 2000 in Villach. (2000)

Yoshiharu Ishikawa：“沉积物运动对森林的损害以及森林对沉积物运动的控制”Interpraevent 2000，菲拉赫。

林建二郎・田中克也・藤間功司・重村利幸: "一方向流中で渦励振動している円柱に作用する流体力の増加特性" 水工学論文集. 40. (1999)

Kenjiro Hayashi、Katsuya Tanaka、Koji Fujima 和 Toshiyuki Shigemura：“增加作用在单向流中经历涡激振动的气缸上的流体力的特性”，《水利工程学报》40。（1999 年）。