Title
A critical assessment of the performance of standard 2D flood models based on results of 3D URANS simulations
Date Issued
01 January 2016
Access level
metadata only access
Resource Type
conference paper
Author(s)
Constantinescu S.G.
University of Iowa
Publisher(s)
CRC Press/Balkema
Abstract
Evaluating the accuracy of 2D depth-averaged solvers to predict flood propagation in natural environments is one of the most important challenges to mitigate floods. This paper discusses the performance of SRH-2D, a standard 2D flood propagation solver in terms of predicted flood extent and depth-averaged velocity profiles in a complex bathymetry river reach for high flow conditions. The accuracy of the 2D solver is mainly evaluated based on comparison with results obtained using a 3D URANS two-phase flow model developed using the commercial software STAR-CCM+. The 2D model performance is evaluated for a steady-state test case. The domain contains a 7-km reach of the Iowa River near Iowa City and 2 river dams. Even though the SRH-2D depth-averaged velocities show the same pattern as the 3D depth-averaged results, the 2D model tends to underpredict the location and magnitude of the peak unit discharge inside the channel, especially in the regions where 3D effects are significant.
Start page
1885
End page
1890
Language
English
OCDE Knowledge area
Ciencias ambientales
Oceanografía, Hidrología, Recursos hídricos
Scopus EID
2-s2.0-85015269144
Resource of which it is part
River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016
ISBN of the container
978-113802913-2
Conference
River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016
Sponsor(s)
The authors would like to acknowledge the Iowa Flood Center and IIHR-Hydroscience and Engineering for funding this numerical investigation. The authors would also like to acknowledge high-performance computing support from Yellowstone (ark:/85065/ d7wd3xhc) provided by NCAR’s Computational and Information Systems Laboratory, sponsored by the National Science Foundation.
Sources of information:
Directorio de Producción Científica
Scopus