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Stability analysis on periodically changing of channel width

机译：信道宽度周期性变化的稳定性分析

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It is an indispensable subject to understand the formation mechanism of the plane shape of a river channel,when considering maintenance of a river channel,and it serves as the basic point of river improvement or river environment. A meandering channel and a braided stream are generally mentioned as the plane shape of a river channel. Research on these formation mechanisms has been conducted. In rivers which formed multi-row bars or braided rivers, riverbanks often have wavy shape on a scale of several times of river width. In such rivers, a wide width part (antinode) and a narrow part (node) appear by turas in the longitudinal direction. Figure 1 shows examples of river channels with repeated node-antinode sections. The elucidation of this phenomenon accompanied by bank erosion is very important on river management works. However, the formation mechanism of this gourd type channel has not been clarified. This research conducts a linear stability analysis including bank erosion phenomenon as the first step which clar-ifies the formation mechanism of such channel shape.
机译：在考虑河道维护时，可以了解河流频道的平面形状的形成机制是不可或缺的。它是河流改善或河流环境的基本点。通常提到蜿蜒的通道和编织物流作为河道的平面形状。已经进行了对这些形成机制的研究。在形成多排酒吧或编织河流的河流中，河岸通常具有多次河宽度的波纹形状。在这种河流中，宽宽度部分（抗腹）和窄部分（节点）在纵向方向上出现。图1示出了具有重复的节点抗曲线部分的河流通道的示例。伴随着银行侵蚀的这种现象的阐明对河流管理工作非常重要。然而，该葫芦型通道的形成机制尚未澄清。该研究进行了线性稳定性分析，包括银行侵蚀现象，作为这种通道形状的形成机制的第一步。

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