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采用无植物和高2、5、9 cm模拟植物的12组次的水槽试验,探讨了植物生长对含沙水流特性的影响规律。试验结果表明,含沙水流流速分布在植物带中不再符合对数分布形式,而为S型分布;水流的雷诺数和弗劳德数随植物高度增加而减小,随流量增加而增大;糙率随植物高度增加而增大,随流量增大而减小;悬移质浓度垂向分布随植物高度增加而降低,随流量增加而增大,沿植物带水流方向悬移质浓度逐渐降低。
The effects of plant growth on the characteristics of sediment-water flow were investigated by using 12 groups of sink experiments without plants and with 2, 5 and 9 cm simulated plants. The experimental results show that the distribution of flow velocity of sandy water no longer coincides with logarithmic distribution, but S-type distribution. The Reynolds number and Froude number of water flow decrease with plant height increasing and increase with increasing flow rate The roughness increases with plant height and decreases with the increase of flow rate. The vertical distribution of suspended matter concentration decreases with plant height, increases with the increase of flow rate, and gradually increases along the flow direction of plant water reduce.