CAUSE AND CHARACTERISTIC SCALES OF MEANDERING AND BRAIDING IN RIVERS
CAUSE AND CHARACTERISTIC SCALES OF MEANDERING AND BRAIDING IN RIVERS
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DOI：
10.1017/s0022112076000748
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发表时间：
1976-01-01
影响因子：
3.7
通讯作者：
PARKER, G
中科院分区：
文献类型：
--
作者：
PARKER, G
本文对模型河的弯曲和辫状扰动进行了稳定性分析。本文用一个小参数表示输沙与水流的比值，用摄动方法得到下列结果：在适当的条件下，输沙和摩擦的存在是水流和床面发生不稳定的必要条件，因此不稳定不是水流本身所固有的。一个安德森型的尺度关系的纵向不稳定性得到蜿蜒。一个关系估计的辫子的数量和区分曲流和编织制度。这些关系与泥沙输移无关。
A stability analysis of meandering and braiding perturbations in a model alluvial river is described. A perturbation technique, involving a small parameter representing the ratio of sediment transport to water transport, is used to obtain the following results.Under appropriate conditions, the existence of sediment transport and friction are necessary conditions for the occurrence of instability in the flow and on the bed; thus instability is not inherent in the flow alone. An Anderson-type scale relation for longitudinal instability is obtained for meandering. A relation estimating the number of braids and differentiating between meandering and braided regimes is derived. These relations are independent of sediment transport.