Design of Erosion-Protection of Flood Plain and Side Slope of Levee by Vegetation

河滩及堤岸边坡植被防冲刷设计

• 批准号: 07555452
• 负责人: TSUJIMOTO Tetsuro
• 金额: $ 0.7万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555452/
• 关键词: Flow with vegetation; Flood plain; Side slope of levee; Erosion; Critical tractive force; Turbulent measurement; Nemerical analysis; Close-to-nature river improvement; 堤防; 法面保護; 掃流力; 耐侵食能; 野外計測

Recently, river improvement should be planned to refine various functional aspects of rivers such as flood control, more efficient water resources utilization, recreational or leisure usage of rivers, well-conserved ecological situation, aquatic habitat and so on. As a compromise, erosion-protection works of flood plain and/or side slope of levee (embankment) by vegetation cover was investigated instead of more rigid protection works.When the sand bed is covered by vegetation layr, the Reynolds stress in the vegetation layr is effectively suppressed due to drag by vegetation. The flow with vegetation was described numerically by taking account of the effect of vegetation. In case of flexible vegetation, the deformation of individual plants and the flow over deformed vegetation layr were solved simultaneously. The method how to measure the flexural rigidity, which governs the deformation of the plants, in the fields was also studied.Furthermore, the effects of geometry of cross-section, which often have flood plain and side slopes, on the erosion-protection efficiency of vegetation layr were investigated by using the three-dimensional numerical analysis of flow with vegetation. The results of calculation obtained by changing the parameters systematically were summarized to be conveniently used for design of erosion-protection works with vegetation cover.

近期，我们应规划改善河道，以改善河道的各种功能，例如防洪、更有效地利用水资源、河道的康乐或消闲用途、妥善保育的生态环境、水生生物栖息地等。作为折衷方案，河漫滩和/或堤防边坡的防冲工程当砂床被植被层覆盖时，植被层的阻力作用有效地抑制了植被层中的雷诺应力。考虑植被的影响，对有植被的水流进行了数值模拟。在柔性植被情况下，同时求解了植物个体的变形和变形植被层上的水流。本文还研究了在野外条件下植被抗弯刚度的测定方法，并通过有植被水流的三维数值模拟，研究了断面形状对植被层防冲效果的影响。总结了系统地改变参数的计算结果，以便于植被防冲工程的设计。

项目成果

辻本哲郎: "梯川河川敷での植生上の流れの計測と植生層の耐侵食能の評価" 第2回河道の水理と河川環境シンポジウム論文集. 81-88 (1995)

Tetsuro Tsujimoto：“博多河床上植被流量的测量和植被层抗侵蚀性的评估”第二届河道水力学和河流环境研讨会论文集81-88（1995）。

辻本哲郎: "新しい河川管理の理念とそれを支える河川水理学の展開" 第3回日独河川技術交流講演会講義集,名古屋. 1-17 (1996)

Tetsuro Tsujimoto：“新的河流管理理念和支持它的河流水力学的发展”第三届日德河流技术交流讲座的讲座集，名古屋1-17（1996）。

Tsujimoto, T.: "Recent development of river hydraulics to support close-to-nature river improvement" Proc.Int.Seminar on the Development of Conservation, Rehabilitation and Creation Techniques of Natural Environ.for Co-Existence of Man with Nature, Seoul,

Tsujimoto, T.：“河流水力学的最新发展，支持接近自然的河流改善”Proc.Int.自然环境保护、恢复和创造技术发展研讨会，人与自然共存，首尔

Tsujimoto, T., A.Shimizu & T.Kitamura: "Turbulent measurements of flow over vegetation on flood plain of the Kakehashi River and evaluation of erosion-resistance of vegetation cover" Proc.2nd Sym.River Hydraul.and Environments, JSCE,Tsukuba. 81-88 (1995)

辻本，T.，A.清水

清水義彦: "平衡植生流水と浮遊砂輪送に関する数値解析" 水工学論文集. 第41巻(印刷中). (1997)

Yoshihiko Shimizu：“平衡植被流和悬浮沉积物输送的数值分析”水利工程杂志第 41 卷（出版中）。