...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Hydraulic Engineering >New Conceptual Framework for the Erosion of Fine Sediment from a Gravel Matrix Based on Experimental Analysis
【24h】

New Conceptual Framework for the Erosion of Fine Sediment from a Gravel Matrix Based on Experimental Analysis

机译：基于实验分析的砾石基质侵蚀微沉积物的新概念框架

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

An experimental nonintrusive methodology is proposed to estimate the spatially averaged erosion rate of fine sediment from a gravel bed. The experiments performed in a laboratory flume show a progressive slowdown of the erosion rate as the level of fine sediment becomes deeper within the gravel matrix, until a maximum depth of erosion is reached. Two original relations are proposed for the maximum cleanout depth and the erosion rate based on a dimensional analysis applied to the experimental results. The proposed erosion rate relation modifies the original Van Rijn formula for a uniform bed, introducing a damping function below the gravel crest. Both the evolution of the erosion rate with depth and the maximum depth of erosion can be defined as simple functions of the general characteristics of the flow and the fine and coarse fractions of the sediment. The proposed approach will lead to improved estimates of the conditions under which fine sediments that have infilled gravel beds are re-entrained. This will help inform strategies aimed at restoring degraded river systems and mitigating the undesired side effects of activities such as sediment flushing which can result in colmation.
机译：提出了一种实验性的非功能性方法，以估计砾石床的细沉积物的空间平均侵蚀率。在实验室水下进行的实验表明，随着细沉积物的水平变得更深的碎片基质，直到达到最大侵蚀深度，侵蚀率的逐渐减速。基于应用于实验结果的尺寸分析，提出了两个原始关系的最大清洁深度和侵蚀率。拟议的侵蚀率关系改变了均匀床的原始Van Rijn公式，引入了砾石嵴下方的阻尼功能。侵蚀速率的演变与深度和最大深度的侵蚀都可以定义为流动的一般特征的简单功能和沉积物的细细和粗级分。该拟议的方法将导致改善对具有潜入砾石床的细沉积物的条件的估计重新夹带。这将有助于提供旨在恢复退化的河流系统的策略，并减轻沉积物冲洗等活动的不期望的副作用，这可能导致殖民地。

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