Computer simulated migration of meandering rivers in Minnesota
Computer simulated migration of meandering rivers in Minnesota
复制标题
计算机模拟明尼苏达州蜿蜒河流的迁移
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
G. Parker
中科院分区：
文献类型：
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作者：
H. Jóhannesson;G. Parker
在这项工作中，由Beck[1985a]开发的用于模拟曲折河流迁移的计算机模型被应用于明尼苏达州的四条河流。该计算机模型基于池田、帕克和萨瓦伊[1981]发展的理论方法。主要目的是评估计算机模型的整体性能，并估计明尼苏达州的河流融合率。利用该模型对四条河流过去的历史进行分析，发现该模型能够再现河流过去的迁移，但需要进行相当大的校正。在所有的案例研究中，都需要显著增加无量纲摩擦因数cf‘。在所有研究区，河流交替流经林区和非林区。研究发现，河流在非森林地区的侵蚀速度通常是在森林地区的两倍左右。这一结果令人感兴趣，特别是在农业领域。它表明了在河边种一片树林的重要性，而不是一直耕种到河岸。
In the present work, a computer model for simulation of the migration of meandering rivers, developed by Beck [1985a], was applied to four rivers in the State of Minnesota. The computer model is based on a theoretical approach developed by Ikeda, Parker, and Sawai [1981]. The major objective was to evaluate the overall performance of the computer model and to estimate the rates of river ml.gration in Minnesota. By using the model to analysis the past history of the four rivers, it was found that the model is able to reproduce the past river migration but needs considerable calibration. In all the case studies it was necessary to increase the dimensionless friction factor, cf ' considerably. In all the study areas the rivers flow alternately through forested and non-forested areas. It was found that the rivers typically eroded about two times faster through non-forested areas than through forested areas. This result is of some interest, especially in agricultural areas. It indicates the importance of having a grove of trees lining the river instead of farming all the way to the river bank.