摘要
通过水槽试验,利用有机玻璃片模拟单株植被,探究明渠中淹没单株植被刚度对水流阻力的影响。水流阻力通过测量水槽上下游两个固定断面的水头损失来体现。植被刚度对水头损失值的影响可分为植被粗糙区和植被光滑区。在植被粗糙区内,水头损失值受流量与植被刚度双重影响,水头损失值与流量呈正相关,水头损失值与植被刚度也呈正相关。在植被光滑区内,水头损失值与植被刚度无关,仅与流量呈正相关。对同一流量而言,水头损失值随着植被刚度的增大而先增大后减小。各组流量的临界刚度值随着流量的增大而增大。
By using organic glass sheet to simulate plant vegetation in the flume experiment,we can explore the influence of the rigidity of the submerged plant vegetation on flow resistance in open channels.The flow resistance is performed by measuring the head loss of flume upstream and downstream two fixed sections.The relationship of the vegetation rigidity and head loss can be divided into the vegetation roughness region and the smooth region.In the roughness region,head loss is dually positively correlated with the flow rate and vegetation rigidity.In the smooth region,Head loss has nothing to do with vegetation rigidity.It is only positively correlated with the flow rate.For the same flow rate,the value of the head loss increases and then decreases as vegetation rigidity increases.Critical components of flow stiffness values increase as the flow rate increases.
出处
《湖北农业科学》
北大核心
2013年第18期4515-4518,共4页
Hubei Agricultural Sciences
基金
河海大学创新训练计划项目(201205XCX025)
