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植被广泛存在于自然河道中,对河流水流特性产生一定影响。利用交错排列的竹签模拟非淹没的刚性植被群落,通过水槽试验,探讨了单个植被群落对水流紊动能分布的影响。结果表明:纵向、横向和垂向三个方向的紊动能分布受到植被群落不同程度的影响,尤其是纵向上紊动能分布在植被群落下游变化较大,呈现两个峰值;植被群落下游靠近植被群落处,横向上紊动能分布为水槽中心附近最大,向两侧逐渐减小,在水槽中心紊动能沿垂向均显著增加。
Vegetation is widely found in natural rivers and affects the flow characteristics of rivers. The intercalated bamboo shoots were used to simulate the non-submerged rigid vegetation communities. The effects of single vegetation communities on the distribution of turbulent energy of water flow were discussed through the sink test. The results show that the distribution of turbulent energy in vertical, horizontal and vertical directions is affected by vegetation communities to varying degrees. In particular, the distribution of turbulent energy in the vertical direction changes greatly in the lower reaches of the vegetation communities, showing two peaks. The vegetation communities are close to the vegetation communities Turbulent energy distribution in the transverse direction is the maximum near the center of the flume and gradually decreases to both sides. The turbulence energy in the center of the flume increases significantly along the vertical direction.