SUFFICIENT CONDITIONS FOR RIVER MEANDERING - A SIMULATION APPROACH
SUFFICIENT CONDITIONS FOR RIVER MEANDERING - A SIMULATION APPROACH
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DOI：
10.1029/wr020i011p01659
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发表时间：
1984-01-01
影响因子：
5.4
通讯作者：
KNUTSON, TR
中科院分区：
文献类型：
--
作者：
HOWARD, AD;KNUTSON, TR
一个数字仿真模型产生现实的曲折模式，从一个最初的直通道与小的随机扰动。该模型假定，名义迁移率随着河道曲率的增加而增加，但当弯曲半径除以河道宽度约为3时达到最大值，更尖锐的弯曲率降低，与Nanson和Hickin（1983）等的观察结果雅阁。然而，也有必要假设，当地移徙率是当地和上游名义移徙率的加权平均数，上游的加权数递减。该模型包括颈部截止的规定，可用于预测蜿蜒河流中未来河道迁移的模式。
A digital simulation model produces realistic meandering patterns starting from an initially straight channel with small random perturbations. The model assumes that nominal migration rates increase as channel curvature increases but reach a maximum when bend radius divided by channel width is about 3, with decreasing rates for sharper bends, in accord with observations of Nanson and Hickin (1983) and others. However, it is also necessary to assume that local migration rates are a weighted average of local and upstream nominal rates, with the weighting decreasing upstream. The model includes provisions for neck cutoffs and may be used to forecast future patterns of channel migration in meandering streams.