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Natural Hazards

, Volume 86, Issue 3, pp 1207–1222 | Cite as

Comparison of two-dimensional flood propagation models: SRH-2D and Hydro_AS-2D

  • Basile Lavoie
  • Tew-Fik Mahdi
Original Paper

Abstract

This article presents a comparison between two two-dimensional finite volume flood propagation models: SRH-2D and Hydro_AS-2D. The models are compared using an experimental dam-break test case provided by Soares-Frazão (J Hydraul Res, 2007. doi: 10.1080/00221686.2007.9521829). Four progressively refined meshes are used, and both models react adequately to mesh and time step refinement. Hydro_AS-2D shows some unphysical oscillations with the finest mesh and a certain loss of accuracy. For that test case, Hydro_AS-2D is more accurate for all meshes and generally faster than SRH-2D. Hydro_AS-2D reacts well to automatic calibration with PEST, whereas SRH-2D has some difficulties in retrieving the suggested Manning’s roughness coefficient.

Keywords

Model comparison Two-dimensional flow modeling Hydro_AS-2D SRH-2D Automatic calibration 

List of symbols

D

Hydraulic diameter

e

Source term

g

Gravitational acceleration

h

Water depth

k

Turbulent kinetic energy

n

Manning’s roughness coefficient

Sfx, Sfy

Energy slope

Sbx, Sby

Bed slope

T

Turbulence stress

u, v

Velocity components

z

Water surface elevation

zb

Bed elevation

μ

Eddy viscosity

μ0

Kinematic viscosity of water

μt

Turbulent eddy viscosity

ρ

Mass density

τ

Shear stress

Notes

Acknowledgements

This research was supported in part by a National Science and Engineering Research Council (NSERC) Discovery Grant, Application No: RGPIN-2016-06413.

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Département des génies Civil, Géologique et des Mines (CGM)École Polytechnique de MontréalMontrealCanada

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