How do gravel bed pool‐riffle streams adjust to changing upstream water and bedload sediment supplies, and what analysis techniques can help to effectively identify how change occurs? Here, we use a mixture of field and experimental data to examine these problems and apply a suite of traditional and novel analysis approaches to highlight dynamics which might otherwise go undetected. Eleven years of monitoring channel morphology in a small forested watershed indicate that pool‐riffles persist through large changes in upstream water and bedload supply and that bed architecture relief is correlated to flow magnitude. A flume experiment consisting of eight runs was conducted to examine the field case in more detail. The experimental design splits the eight runs into four runs of relatively high water and sediment supply and four of relatively low water supply, with no upstream sediment supply. Experimental results corroborate the field‐based measurements of pool‐riffle persistence, which is due to a coupling between downstream width variations, and spatial patterns of flow velocity and bedload transport. More specifically, measurements made during the flume experiments along a prominent pool‐riffle pair indicate that temporal and spatial changes to topography, flow hydraulics, and bed surface sediment texture are more rich and nuanced than existing generalizations offer. For example, clustering analysis completed using self‐organizing maps indicates that sediment sorting between pools and riffles is not simply a binary type response of finer versus coarser described by some characteristic grain size.

中文翻译：

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由于流量和泥沙供应量的变化而对水池和池塘进行调整

砾石床池流如何适应上游水和床底沉积物供应的变化，哪些分析技术可以帮助有效地识别变化如何发生？在这里，我们使用现场数据和实验数据的混合物来检查这些问题，并应用一整套传统和新颖的分析方法来突出显示否则可能无法检测到的动力学。在一个小的森林流域中，对通道形态进行了11年的监测表明，池上游水流通过上游水和床位供应量的巨大变化而持续存在，并且河床构造的减轻与流量大小相关。进行了由八次运行组成的水槽实验，以更详细地检查现场案例。实验设计将八次运行分为四个供水和沉积物供应相对较高的运行，以及四个相对较低的供水系统，而没有上游沉积物供应。实验结果证实了池壁持久性的基于现场的测量，这是由于下游宽度变化与流速和河床输运空间模式之间的耦合所致。更具体地说，在水槽实验过程中沿一个显着的池格对进行的测量表明，地形，流动水力和床表面沉积物质地的时空变化比现有的概括更为丰富和细致。例如，