...
  • 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 >Quantifying bed-related suspended load in gravel bed rivers through an analysis of the bedload-suspended load relationship
【24h】

Quantifying bed-related suspended load in gravel bed rivers through an analysis of the bedload-suspended load relationship

机译：通过分析床单悬挂载荷关系来量化床型床河中的床上悬浮载荷

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

Suspended load transport can strongly impact ecosystems, dam filling and water resources. However, contrary to bedload, the use of physically based predicting equations is very challenging because of the complexity of interactions between suspended load and the river system. Through the analysis of extensive data sets, we investigated extent to which one or several river bed or flow parameters could be used as a proxy for quantifying suspended fluxes in gravel bed rivers. For this purpose, we gathered in the literature nearly 2400 instantaneous field measurements collected in 56 gravel bed rivers. Among all standard dimensionless parameters tested, the strongest correlation was observed between the suspended sediment concentration and the dimensionless bedload rate. An empirical relation between these two parameters was calibrated. Used with a reach average bedload transport formula, the approach allowed to successfully reproduce suspended fluxes measured during major flood events in seven gravel bed alpine rivers, morphodynamically active and distant from hillslope sources. These results are discussed in light of the complexity of the processes potentially influencing suspended load in a mountainous context. The approach proposed in this paper will never replace direct field measurements, which can be considered the only confident method to assess sediment fluxes in alpine streams; however, it can increment existing panel tools that help river managers to estimate even rough but not unrealistic suspended fluxes when measurements are totally absent. (c) 2019 John Wiley & Sons, Ltd.
机译：悬挂式负荷运输可以强烈影响生态系统，坝填充和水资源。然而，与床单相反，由于悬浮载荷与河流系统之间的相互作用的复杂性，使用物理基于预测方程的使用非常具有挑战性。通过对广泛数据集的分析，我们调查了一个或多个河床或流量参数的程度，可以用作量化砾石床河流中的悬浮助焊剂的代理。为此目的，我们在文献中收集了近2400辆瞬间田间测量，在56个砾石床河里收集。在测试的所有标准无量纲参数中，在悬浮沉积物浓度和无量纲床单速率之间观察到最强的相关性。校准这两个参数之间的经验关系。与达平均床单运输配方一起使用，允许在七个砾石床高山河流的主要洪水事件中允许成功再现悬浮的助焊剂，其形态学活跃和远离山坡来源。根据可能影响山区背景下的悬浮载荷的过程的复杂性讨论这些结果。本文提出的方法将永远不会取代直接现场测量，这可以被认为是评估高山流中沉积物通量的唯一自信的方法;但是，它可以增加现有的面板工具，帮助经理估计甚至粗糙但在测量完全不存在时甚至不切实际的悬浮通量。 （c）2019 John Wiley＆Sons，Ltd。

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