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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >An approach for measuring confinement and assessing the influence of valley setting on river forms and processes
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An approach for measuring confinement and assessing the influence of valley setting on river forms and processes

机译：一种测量界限并评估山谷设置对河流形态和过程影响的方法

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摘要

Valley setting and confinement (or lack thereof) are primary controls on river character and behaviour. Although there are various proxies for valley confinement, direct measures that quantify the nature and extent of confinement are generally lacking and/or inconsistently described. As such they do not lend themselves to consistent analysis over large spatial scales. Here we clearly define forms of confinement to aid in quantification of degrees of confinement. Types of margin that can induce confinement are differentiated as a valley margin, valley bottom margin, and/or anthropogenic margin. Such margins sometimes overlap and share the same location, and in other situations are separated, giving immediate clues as to the valley setting. We apply this framework to examples from Australia, United States and New Zealand, showing how this framework can be applied across the spectrum of river diversity. This method can help to inform interpretations of reach-scale river behaviour, highlighting the role of antecedent controls on contemporary forms and processes. Clear definitions of confinement are shown to support catchment-scale analysis of river patterns along longitudinal profiles, and appraisals of the geomorphic effectiveness of floods and sediment flux in catchments (e.g. process zone distribution, lateral sediment inputs and (dis)connectivity). Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：谷地的设置和限制（或缺乏限制）是河流特征和行为的主要控制措施。尽管有很多关于谷底限制的代理，但是通常缺乏和/或不一致地描述了量化限制性质和程度的直接措施。因此，它们不适合在大空间尺度上进行一致的分析。在这里，我们清楚地定义了限制形式，以帮助量化限制程度。可以引起限制的边缘类型分为谷底边缘，谷底边缘和/或人为边缘。这些边缘有时会重叠并共享相同的位置，而在其他情况下则会分开，从而立即提供有关山谷设置的线索。我们将此框架应用于来自澳大利亚，美国和新西兰的示例，展示了如何将该框架应用于整个河流多样性。这种方法可以帮助解释河段规模的河流行为，突显了先行控制在当代形式和过程中的作用。显示了明确的限制定义，以支持对沿纵向剖面的河流格局进行集水规模分析，并评估洪水和集水区的泥沙通量的地貌有效性（例如过程区分布，侧向泥沙输入和（不）连通性）。版权所有（c）2015 John Wiley＆Sons，Ltd.

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