Laboratory rivers: Lacey's law, threshold theory, and channel stability
Laboratory rivers: Lacey's law, threshold theory, and channel stability
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实验室河流：莱西定律、阈值理论和河道稳定性
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
O. Devauchelle
中科院分区：
文献类型：
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作者：
F. Métivier;E. Lajeunesse;O. Devauchelle
抽象的。超过世纪的实验证明，自然河流的许多特征可以在实验室中重现。在这里，我们重新回顾其中的一些实验，将它们的结果纳入格洛弗和弗洛里（1951）发展的阈值通道理论的框架。在我们分析的所有实验中，无论河流的平面形状（单线或编织）如何，河道的典型尺寸都符合这一理论。在这方面，实验室河流的行为与自然河流完全相同。利用这一发现，我们重新解释了Stebbings（1963）的实验。我们认为，泥沙输移扩大了通道，直到它达到一个极限宽度，超过此宽度，它不稳定成辫状河。如果得到证实，这一观察结果将解释实验室实验中单线通道的显着稀缺性。
Abstract. More than a century of experiments have demonstrated that many features of natural rivers can be reproduced in the laboratory. Here, we revisit some of these experiments to cast their results into the framework of the threshold-channel theory developed by Glover and Florey (1951). In all the experiments we analyze, the typical size of the channel conforms to this theory, regardless of the river's planform (single-thread or braiding). In that respect, laboratory rivers behave exactly like their natural counterpart. Using this finding, we reinterpret experiments by Stebbings (1963). We suggest that sediment transport widens the channel until it reaches a limit width, beyond which it destabilizes into a braided river. If confirmed, this observation would explain the remarkable scarcity of single-thread channels in laboratory experiments.