含植物水流动力特性研究进展

鉴于植物与水动力之间复杂的相互作用过程,从植物对水流的阻力作用、植物引起的紊动作用以及植物对波浪的消减作用三方面,综述了国内外含植物水流动力特性研究进展,总结了不同水动力条件下含植物河道Manning系数、拖曳力系数与植物特性之间的定量关系,讨论了植物引起的纵向流速垂向分布和紊动强度变化以及植物在海岸带波浪消减中起到的作用。针对目前含植物水流动力特性研究中存在的不足,指出植物拖曳力系数、含植物水流紊动特征、植物-水流-波浪耦合作用机理为今后研究的重点。

Advances in hydrodynamic characteristics of flows with vegetation

Due to the complex interaction between vegetation and hydrodynamics, research progress in the characteristics of flows with vegetation from both home and abroad were reviewed in three aspects, including flow resistance, vegetation-induced turbulence and wave attenuation. The quantitative relationship between Manning coefficient and vegetation features, and the relationship between drag factors and vegetation features under different hydrodynamic conditions were summarized. The vertical distribution of stream-wise velocity and turbulence caused by vegetation as well as the wave attenuation effects by vegetation in costal zones were also discussed. Aiming at the shortcomings in the current research of vegetated flow hydrodynamics, the future research direction in this field were proposed, including the drag factors, the turbulent characteristics of vegetated flows and the coupling mechanisms of vegetation-flow-wave.