Numerical meander models

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Factsheet: Numerical meander models

General
Category Hydromorphological models
River Characterisation
Pressures
Measures


Numerical meander models

Type

Hydromorphological models

Basic principles

Linearized fundamental equations for conservation of water mass and water flow momentum, spatially averaged over water depth and time-averaged over all turbulent fluctuations. Linearized parameterized relation for effect of helical flow on bed shear stress direction. Empirical bank migration predictor. Possibly linearized equilibrium sediment transport predictor. Possibly linearized empirical relation for effect of sloping beds on sediment transport magnitude and direction. Linearized Exner equation for conservation of sediment mass.

Outputs

Flow velocities, water depths, water levels, flow shear stresses. Sediment transport, bed level, bank erosion, meander migration.

Rivertypes

Related Pressures

Related Measures


Useful references

Selected software systems

MIANDRAS

Theoretical background

Crosato A. (1989): Meander migration prediction. Excerpta, GNI, Vol.4, Libreria Progetto, Padova, pp.169-198.

Crosato: A. (2008): Analysis and modelling of river meandering. PhD thesis, Delft University of Technology, IOS Press, ISBN 978-1-58603-915-8.

Ikeda S., Parker G., Sawai K. (1981): Bend theory of river meanders, Part 1, Linear development. J. Fluid Mech., vol.112, pp.363-377. http://dx.doi.org/10.1017/S0022112081000451

Sample applications