Quantitative properties of delta channel networks
Quantitative properties of delta channel networks
复制标题
三角洲通道网络的定量特性
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
V. Moruzzi
中科院分区：
文献类型：
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作者：
J. S. Smart;V. Moruzzi
翻译后摘要：三角洲分流系统的拓扑和几何性质的研究开发了一些简单的程序。三角形河道网络有三种顶点（分叉点、交汇点和出口）和六种连接点，每种连接点对应于上游和下游顶点的六种可能组合之一。顶点数和链数的各种函数可用于指定网络的拓扑性质。一个特别有用的函数是重组因子，或连接数与分叉数之比。这个比率从零变化，从网络没有重组到统一的辫状河。一个详细的拓扑研究网络的五个自然三角洲（科尔维尔，伊洛瓦底江，育空地区，尼日尔和巴拉那）的重组因子范围从0.5到0.85。不同种类的链接的频率可以合理地解释为一个简单的模型，假设随机连接的顶点。对于一个给定的网络的链接长度似乎属于一个共同的分布，并依赖于相对较小的位置相对于海岸。对巴拉那河的研究结果表明，它应该被看作是两个串联的三角洲，每个三角洲都有其特有的重组因子。
Abstract : Some simple procedures are developed for studying the topologic and geometric properties of delta distributary systems. A delta channel network has three kinds of vertices (forks, junctions, and outlets) and six kinds of links, each corresponding to one of the six possible combinations of upstream and downstream vertices. Various functions of the vertex and link numbers may be used to specify the topologic properties of the network. A particularly useful function is the recombination factor, or ratio of number of junctions to number of forks. This ratio varies from zero from networks with no recombination to unify for braided streams. A detailed topologic study of the networks of five natural deltas (Colville, Irrawaddy, Yukon, Niger, and Parana) shows recombination factors ranging from 0.5 to 0.85. The frequency of different kinds of links can be explained reasonably well be a simple model that assumes random connection of vertices. The link lengths for a given network appear to belong to a common distribution and to depend relatively little on location with respect to the coast. The results on the Parana suggest that it should be considered as two deltas in tandem, each with its characteristic recombination factor.