2D numerical modelling of meandering channel formation

被引：11

作者：

Xiao, Y. ^{[1
]}

Zhou, G. ^{[2
]}

Yang, F. S. ^{[1
]}

机构：

[1] Chongqing Jiaotong Univ, Natl Inland Waterway Regulat Engn Res Ctr, Chongqing, Peoples R China

[2] Chinese Res Inst Environm Sci, Beijing, Peoples R China

来源：

JOURNAL OF EARTH SYSTEM SCIENCE | 2016年 / 125卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Fluvial process; armored beds; bank erosion; channel evolution; 2D numerical model; SAND-BED RIVERS; FLOW; TOPOGRAPHY; SIMULATION; BEND;

D O I：

10.1007/s12040-016-0662-5

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A 2D depth-averaged model for hydrodynamic sediment transport and river morphological adjustment was established. The sediment transport submodel takes into account the influence of non-uniform sediment with bed surface armoring and considers the impact of secondary flow in the direction of bed-load transport and transverse slope of the river bed. The bank erosion submodel incorporates a simple simulation method for updating bank geometry during either degradational or aggradational bed evolution. Comparison of the results obtained by the extended model with experimental and field data, and numerical predictions validate that the proposed model can simulate grain sorting in river bends and duplicate the characteristics of meandering river and its development. The results illustrate that by using its control factors, the improved numerical model can be applied to simulate channel evolution under different scenarios and improve understanding of patterning processes.

引用

页码：251 / 267

页数：17

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