Morphodynamic Simulation of River Bend Retreat (erosion)

Modeling the failure and erosion of river bank in bends by considering a 3D flow and simulation of river bank retreat due to erosion and failure mechanism. Monitoring the necessary parameters in field and also doing experimental test in laboratory. Direct measurement of shear stress at bank and exploration of turbulent structure responsible for erosion of sediment at river bank are other aims of this research.In year 2005:A review on erosion and failure mechanism together with mathematical models of flow and fluvial processes has been achieved and prepared in 70 pages. A new formula for computation of critical shear stress at side slope of the river was developed by consideration of hydrodynamic pressure forces.Hardebek-Brokenlander Au was selected for the monitoring purposes. Required instruments have been studied and will be ordered in the coming year. Detail drawings for experimental set up in the mentioned river have been drawn. The first laser scanning from eroded part of riverbank has been achieved.Having received RMA suit models (RMA10, RMA11, RMAAGEN) from Prof. King, the first steps in implementations of new morphodynamic model were taken, that is getting through the code.Now the sediment transport and erosion model for the bank-toe of the riverbank in a meandering channel is under development.

Stichwörter

• River bank
• Three dimensional model
• erosion
• morphodynamic