CHANGES IN STREAM CHANNEL CHARACTERISTICS AT TRIBUTARY JUNCTIONS
CHANGES IN STREAM CHANNEL CHARACTERISTICS AT TRIBUTARY JUNCTIONS
复制标题
支流交汇处河道特征的变化
DOI：
10.1080/02723646.1987.10642333
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发表时间：
1987
影响因子：
1.6
通讯作者：
B. Rhoads
中科院分区：
文献类型：
--
作者：
B. Rhoads
几个现有的数据集进行了经验分析，以确定在流汇合的通道特性的变化的性质。分类的数据表明，这种变化是多种多样的，并不符合主要和次要支流的同步通道形成流的水力几何的基础上的预测。散点图显示，在最好的情况下，变量的变化率和结对称比之间只存在微弱的关系。大多数图显示突然的不连续性，将低对称值处的正和负变化与仅为正或负的高对称值处的变化分开。这些不连续性的阈值通常发生在约0.7的对称比处。这样的阈值可以指示控制结形态的因素的突然变化。要解决这一问题，需要在特定地点和流域范围内进行更多的研究。
Several existing data sets are analyzed empirically to determine the nature of changes in channel characteristics at stream confluences. Classifications of the data indicate that such changes are diverse and do not conform well with predictions based on the hydraulic geometry of synchronous channel-forming flows on major and minor tributaries. Scatterplots reveal that at best only weak relation ships exist between rates of change for the variables and junction symmetry ratio. Most of the plots display abrupt discontinuities separating positive and negative changes at low symmetry values from changes at high symmetry values that are positive or negative only. These thresholds of discontinuity generally occur at a symmetry ratio of approximately 0.7. Such thresholds may be indicative of abrupt changes in the factors controlling junction morphology. More research is required both at site-specific and basin-wide scales to resolve this issue.