Evolution of Meander Loops
Evolution of Meander Loops
复制标题
曲折环的演变
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
J. Brice
中科院分区：
文献类型：
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作者：
J. Brice
重建了美国10条冲积河流河段的曲流演变，并提出了一个曲流环演变和分类的方案，该方案来自对125条冲积河流曲流模式的研究。在主要的进化趋势中，一个低的对称弧的曲率近似恒定，往往增加高度，但半径减小，因为它的增长。当它的长度超过它的半径，弧被称为一个简单的对称曲折环。一个简单的弧线由于在其周长上增加了第二条常曲率弧而变得不对称，这条弧通常与第一条弧相切，并向河流的同一侧弯曲。当一个简单的环的周长上的第二个弧发展成一个环时，它就变成了复合环。四个主要类别的循环（简单对称，简单不对称，复合对称，复合不对称）和约16个形式类型。复合回线被认为是半径和长度不确定的异常形式，而曲折模式可以被分析为简单回线，其性质可以被测量和统计处理。
The evolution of the meanders on reaches of 10 alluvial streams in the United States is reconstructed, and a scheme for the evolution and classification of meander loops, derived from a study of the meandering pattern of 125 alluvial streams, is proposed. In the main evolutionary trend, a low symmetrical arc of approximately constant curvature tends to increase in height but decrease in radius as it grows. When its length exceeds its radius, the arc is termed a simple symmetrical meander loop. A simple loop becomes asymmetrical by the growth on its perimeter of a second arc of constant curvature, which is commonly tangent to the first and curved toward the same side of the stream. A simple loop becomes compound when a second arc on its perimeter has developed into a loop. Four main categories of loops (simple symmetrical, simple asymmetrical, compound symmetrical, and compound asymmetrical) and about 16 form types are proposed. The compound loops are regarded as aberrant forms of indefinite radius and length, but the meandering patterns can be analyzed into simple loops whose properties can be measured and treated statistically.