2D numerical modelling of meandering channel formation

Journal of Earth system science

Y Xiao1²  F S Yang1²  G Zhou2¹ 

[1] Chinese Research Academy of Environmental Sciences, Beijing, China$$;National Inland Waterway Regulation Engineering Research Center, Chongqing Jiaotong University, Chongqing, China$$

关键词: Fluvial process;    armored beds;    bank erosion;    channel evolution;    2D numerical model.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 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-loadtransport 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 numericalpredictions 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 differentscenarios and improve understanding of patterning processes.

【 授权许可】

Unknown