植被作用下的复式河槽流速分布特性

被引:29
作者
杨克君 [1 ]
刘兴年 [1 ]
曹叔尤 [1 ]
拾兵 [2 ]
张之湘 [1 ]
机构
[1] 四川大学水力学与山区河流开发保护国家重点实验室
[2] 中国海洋大学
关键词
复式河槽; 滩地种树; 流速分布; 植物类型;
D O I
暂无
中图分类号
TV131 [水力理论、计算、实验];
学科分类号
0801 ; 080103 ; 080104 ; 081502 ;
摘要
通过水槽试验,探讨了不同滩地植物(乔木、灌木和野草)对复式河槽流速分布的影响.详细地介绍试验过程及三维流速仪ADV的测量原理.试验时,选塑料吸管、鸭毛和塑料大草分别模拟乔木、灌木和野草.同时,考虑了流量、床面底坡对流速分布的影响.试验结果表明,滩地未种树的复式河槽在大的相对水深时,流速满足对数分布;滩地种树后,主槽流速增大,流速分布复杂,滩地流速减小,呈S形分布,不同植物的S形分布是不同的.这种S型分布将水流划分为3个区的复杂行为,每区的范围与水深,垂线位置和植物类型有关.床面坡度对流速分布的影响非常明显.
引用
收藏
页码:246 / 250
页数:5
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