Towards a nonlinear meander evolution model.

Shiyan Zhang, Dong Chen, Koen Blanckaert, Willem Ottevanger, LeiLei Gu

Tuesday 30 june 2015

11:00 - 11:15h at Oceania (level 0)

Themes: (T) Sediment management and morphodynamics, (ST) River morphodynamics

Parallel session: 5B. Sediment - River

The evolution of meanders has been the focus of research challenging river engineers for decades. The study simulates the natural evolution of meandering processes by coupling a nonlinear flow model (by Blanckaert and de Vriend, 2010) with the Bank Erosion and Retreat Model (BERM, by Chen and Duan, 2012). Distinguished from our linear meander evolution model (Chen and Duan, 2006) which adopted the first-order analytical solution of flow field in a sine-generated channel (by Johannesson and Parker, 1989), the present model is applicable to any channel planforms without curvature restrictions therefore more suitable for moderately and strongly curved channels. The computed results demonstrate the improvement of simulation of meander evolution by adopting the advanced hydrodynamic model.