再現手法による交互砂州形状への影響  [in Japanese] Influence on the bar formation by simulation method  [in Japanese]

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Abstract

中規模河床形態の一つである交互砂州は,その形状特性から治水および河川環境を考える上できわめて重要な要素の一つとなっている.このため,その形状特性の把握手法として様々な数値計算手法が提案されている.本研究では,水理模型実験や理論解析で得られる交互砂州の発達過程および形状との比較を行うことにより,種々の計算条件(初期条件や境界条件)により,結果がどのように変化するかを系統的に検討した.その結果,条件によって得られる結果が大きく異なり,計算を行ううえで特に注意すべき事項が明らかとなった.

The locations and scales of local scouring and bank erosion arelargely influenced by the shapes of alternate bars. Alternate bars isone of the very important elements in river improvement and riverenvironment by the characteristics of the shape. For this reason, thevarious numerical computation techniques for the grasp the form areproposed. In this research, it was examined systematically how a resultwould change on various calculation conditions (an initial conditionand a boundary condition) with comparing the development process ofthe alternate bars obtained by a hydraulic model experiment ortheoretical analysis. As a result, the matter which it should becareful of especially when the result obtained by conditionscalculates by differing greatly became clear.

Journal

  • NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 58(0), 81-81, 2009

    National Committee for IUTAM

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