...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >The effect of bed mobility on resistance to overland flow
【24h】

The effect of bed mobility on resistance to overland flow

机译：床层流动性对水流阻力的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

When sediment grains are transported as bed load in overland flow, there is a net transfer of momentum from the flow to the grains. When these grains collide with other grains, whether on the bed or in the flow, stream-wise flow velocity decreases and resistance to flow increases. Resistance to flow generated in this manner is termed bed-load transport resistance. Resistance to flow f over a plane bed may be partitioned into grain resistance f(g) and bed-load transport resistance f(bt). We use the symbols f(btf) and f(btm) to denote f(bt) for flows over fixed beds and over mobile beds, respectively, and we compute the effect of bed mobility on flow resistance f(mob) by subtracting f(btf) from f(btm). The data for this study come from 54 flume experiments with fixed beds and 38 with mobile beds. On average f(mob) is approximately equal to half of f(btm), which is about one-quarter off. Hence, f(mob) is about one-tenth off. Predictive equations are
机译：当沉积物颗粒作为底流在地面流中运输时，动量从流向颗粒的净转移是净的。当这些颗粒与其他颗粒碰撞时，无论是在床层上还是在流中，流向流速都会降低，流动阻力会增加。以这种方式产生的流动阻力称为床载运输阻力。可以将流经平面床上的阻力f分为颗粒阻力f（g）和床载运输阻力f（bt）。我们分别使用符号f（btf）和f（btm）分别表示固定床和移动床上的流量f（bt），并减去f（ f（btm）中的btf）。这项研究的数据来自54个固定床的水槽实验和38个移动床的水槽实验。平均而言，f（mob）大约等于f（btm）的一半，大约相差四分之一。因此，f（mob）大约减少了十分之一。预测方程为

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号