摘要
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 influence of vegetation growth on characteristics of concentration flow are investigated by using 12 groups flume experiment with no plant and plant height of 2, 5, 9 cm. The results show that the vertical velocity distribution of sediment flow in the plant is no longer consistent with logarithmic distribution while it is the S-type distributiom Reynolds number and Froude number of flow decrease with the increase of plant height; it increases with the increase of discharge; roughness increases with the increase of plant height; it decreases with the discharge increases; vertical distribution of suspended sediment concentration decreases with the increase of plant height; it increases with the increase of discharge; the concentration of suspended sediment decreases along the flow direction of plants.
出处
《水电能源科学》
北大核心
2011年第7期67-70,195,共5页
Water Resources and Power
基金
国家自然科学基金资助项目(50769001)
云南省自然科学基金资助项目(2008ZC017M)
云南省中青年后备人才基金资助项目(2005PY01-34)
关键词
植物生长
含沙水流
流速
雷诺数
弗劳德数
糙率
悬移质垂向浓度
growth of vegetation
concentration flow
velocity
Reynolds number
Froude number
roughness
vertical distribution of suspended sediment concentration
