scholarly journals STUDY ON THE PROCESSES OF BANK EROSION WITH BAR FORMATION BY NUMERICAL SIMULATION

2003 ◽  
Vol 47 ◽  
pp. 649-654
Author(s):  
Atsuko TERAMOTO ◽  
Tetsuro TSUJIMOTO
Keyword(s):  
Numerical Simulation ◽  
Bank Erosion ◽  
Bar Formation

scholarly journals Numerical simulation of bedload tracer transport associated with sand bar formation, bank erosion, and channel migration

2018 ◽  
Vol 40 ◽  
pp. 02013
Author(s):  
Toshiki Iwasaki ◽  
Satomi Yamaguchi ◽  
Hiroki Yabe
Keyword(s):  
Numerical Model ◽  
Bank Erosion ◽  
Bedload Transport ◽  
Transport Processes ◽  
Tracer Transport ◽  
Channel Migration ◽  
River Systems ◽  
Sand Bars ◽  
Tracer Particles ◽  
Bar Formation

An understanding of bedload transport processes is an essential research goal for better prediction of river morphology and morphodynamics as well as the transport and fate of sediment-bound materials in river systems. Passive tracer particles have been used widely to monitor bedload transport processes in rivers by measuring the spatiotemporal distribution of the bedload tracers. Here, we propose a numerical model for reproducing the transport of bedload tracers in river systems, more specifically, the behaviours of bedload tracers under the influence of complex river morphodynamics. A two-dimensional morphodynamic model is combined with a flux-based bedload tracer model with use of the active layer approach. The model is applied to a laboratory experiment that demonstrates the transport processes within the channel of bedload tracers supplied from the floodplain. The numerical model effectively reproduces the main features of the experiment, namely, the bedload tracers supplied from the floodplain due to bank erosion deposit onto sand bars developed within the channel. Because the sand bars cause a very long residence time of the bedload tracers within the bed, the transport speed of the tracers is slowed significantly under the influence of bar formation and channel migration.

scholarly journals Numerical simulation of hydrodynamics and bank erosion in a river bend

2008 ◽  
Vol 44 (9) ◽  
Author(s):  
Massimo Rinaldi ◽  
Beatrice Mengoni ◽  
Laura Luppi ◽  
Stephen E. Darby ◽  
Erik Mosselman
Keyword(s):  
Numerical Simulation ◽  
Bank Erosion ◽  
River Bend

Numerical simulation of bank erosion and channel migration in meandering rivers

2002 ◽  
Vol 38 (9) ◽  
pp. 2-1-2-21 ◽  
Author(s):  
Stephen E. Darby ◽  
Andrei M. Alabyan ◽  
Marco J. Van de Wiel
Keyword(s):  
Numerical Simulation ◽  
Bank Erosion ◽  
Channel Migration ◽  
Meandering Rivers

scholarly journals Numerical Simulation of Bar Formation in Straight Channels by the NHSED2D Model

2002 ◽  
Vol 5 ◽  
pp. 629-638 ◽  
Author(s):  
Adichai PORNPROMMIN ◽  
Atsuko TERAMOTO ◽  
Norihiro IZUMI ◽  
Tadanori KITAMURA ◽  
Tetsuro TSUJIMOTO
Keyword(s):  
Numerical Simulation ◽  
Bar Formation

scholarly journals Numerical Simulation of Flow Pattern in Series of Impermeable Groynes in Fixed Bed

2021 ◽  
Vol 6 ◽  
pp. 83-88
Author(s):  
Mukesh Raj Kafle
Keyword(s):  
Numerical Simulation ◽  
Velocity Field ◽  
Flow Pattern ◽  
Fixed Bed ◽  
Bank Erosion ◽  
Recirculating Flow ◽  
Optimal Spacing ◽  
In Series ◽  
Computational Fluid Dynamics Cfd

This paper presents a numerical simulation of recirculating flow patterns in groyne fields. Moreover, it entails the concept determination of proper spacing of vertical unsubmerged and impermeable groynesin seriesto control the bank erosion. Flow pattern between the groynes varies along their space. The flow in groyne field may significantly affect the flow change, bed change, bank erosion and condition of habitat. In this regard, an assessment of flow along the space of groynes will yield important data needed to diversify the object of groyne installation. So, knowledge about determination of the proper spacing of groynes in groyne field is important. Space of vertical groynes was set from 1.5 to 10 times the length of groynes. The velocity field between groynes was simulated by using Computational Fluid Dynamics (CFD) model Nays 2D. Simulated velocity field was compared with existing experimentaldata for the same parameter, which agreed satisfactorily. Based on simulated results,the optimal spacing of vertical groynes to control the bank erosion was recommended.

Sign in / Sign up

Export Citation Format

Share Document