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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Channel degradation and slope adjustment in steep streams controlled through bed sills
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Channel degradation and slope adjustment in steep streams controlled through bed sills

机译：通过床槛控制的陡流中的河道退化和坡度调节

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摘要

General, parallel and rotational degradation and the effect of bed sills are investigated with the aid of historical field data and laboratory experiments. The case under consideration is a system of two tributaries and a main river in northeast Spain, characterized by its short length, steepness and ephemeral nature. he comparison of bed profiles since 1962 revealed an incision greater than 5.5 m. The main causes of degradation are thought to be channelization (width reduction) and urban growth. The equilibrium slopes with and without sills were obtained in 111 live-bed flume tests. It is demonstrated that the bed slope is milder with sills than without sills under the same flow and sediment rates. The equations for the calculation of equilibrium slopes, scaled to prototype, are applied to the case-study, with good agreement. Copyright (C) 2008 John Wiley and Sons, Ltd.
机译：借助历史现场数据和实验室实验研究了总体，平行和旋转降解以及窗台的影响。正在考虑的案例是由西班牙西班牙东北部的两个支流和一条主要河流组成的系统，其特点是长度短，陡峭和短暂。自1962年以来对床身轮廓的比较显示，切口大于5.5 m。退化的主要原因被认为是渠道化（宽度减少）和城市增长。在111个活床水槽试验中获得了带和不带门槛的平衡斜率。结果表明，在相同流量和泥沙速率下，有窗台的坡度要比没有窗台的坡度小。按比例缩放到原型的平衡斜率计算公式应用于案例研究，具有很好的一致性。版权所有（C）2008 John Wiley and Sons，Ltd.

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