...
  • 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 >Interchannel hydraulic geometry and hydraulic efficiency of the anastomosing Columbia river, southeastern british Columbia, canada
【24h】

Interchannel hydraulic geometry and hydraulic efficiency of the anastomosing Columbia river, southeastern british Columbia, canada

机译：加拿大不列颠哥伦比亚省东南部的哥伦比亚河吻合河道的水力几何学和水力效率

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

The morphodynamics of the anastomosing channel system of upper Columbia River in southeastern British Columbia, Canada, is examined using an adaptation of conventional hydraulic geometry termed 'interchannel hydraulic geometry'. Interchannel hydraulic geometry has some of the characteristics of downstream hydraulic geometry but differs in that it describes the general bankfull channel form and hydraulics of primary and secondary channels in the anastomosing channel system. Interchannel hydraulic geometry generalizes these relationships and as such becomes a model of the geomorphology of channel division and combination. Interchannel hydraulic geometry of upper Columbia River, based on field measurements of flow velocity and channel form at 16 test sections, is described well by simple power functions: w_(bf) = 3.24 Q_(bf)~(0.64); d_(bf) = 1.04 Q_(bf)~(0.19); v_(bf) = 0.30 Q_(bf)~(0.17). These results, with other related measurements of flow resistance, imply that channel splitting leads to hydraulic inefficiency (higher flow resistance) on the anastomosing Columbia River. Because these findings differ from those reported in studies elsewhere, we conclude that hydraulic efficiency does not provide a general explanation for anabranching in river channels.
机译：在加拿大不列颠哥伦比亚省东南部的上哥伦比亚河上游的吻合河道系统的形态动力学，是使用一种称为“河道间水力几何学”的传统水力几何学的改编进行了研究。通道间水力几何学具有下游水力几何学的一些特征，但是不同之处在于它描述了吻合通道系统中一般的堤岸通道形式以及主要和次要通道的水力学。通道间的水力几何关系概括了这些关系，因此成为通道划分和组合的地貌模型。基于对16个测试段的流速和通道形式的现场测量，可以通过简单的幂函数很好地描述哥伦比亚河上游的通道间水力几何形状：w_（bf）= 3.24 Q_（bf）〜（0.64）; d_（bf）= 1.04 Q_（bf）〜（0.19）; v_（bf）= 0.30 Q_（bf）〜（0.17）。这些结果以及其他与流阻相关的测量结果表明，通道分裂会导致在吻合哥伦比亚河上造成水力效率低下（流阻更高）。因为这些发现与其他地方的研究结果不同，所以我们得出结论，水力效率不能为河道的蓄水提供一般性解释。

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