BOUNDARY SHEAR STRESS CAUSED BY VEGETATION NEAR RIVER BANK

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  • 樹木群を有する河道流れの境界せん断力の特性と境界混合係数<i>f</i>の評価
  • 樹木群を有する河道流れの境界せん断力の特性と境界混合係数fの評価
  • ジュモクグン オ ユウスル カドウ ナガレ ノ キョウカイ センダンリョク ノ

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Abstract

The boundary mixing coefficient of the shear stress which atcs on an interface between river flow and vegetation near river bank is determined analytically by applying 2 D-flow computational model. In this analysis, depth averaged currents are separated into main flow and deviated flow whose components can represent flow field with large eddies. It becomes clear that the values of boundary mixing coefficient evaluated from this analysis agrees with the experimantal values measured by FUKUOKA and FUJITA. Mechanism determining the boundary shear stress are examined in detail.

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