TY - GEN
T1 - A critical assessment of the performance of standard 2D flood models based on results of 3D URANS simulations
AU - Munoz, D. V.Horna
AU - Constantinescu, S. G.
N1 - Publisher Copyright:
© 2016 Taylor & Francis Group, London.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85015269144&partnerID=8YFLogxK
U2 - 10.1201/9781315644479-295
DO - 10.1201/9781315644479-295
M3 - Conference contribution
AN - SCOPUS:85015269144
SN - 9781138029132
T3 - River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016
SP - 1885
EP - 1890
BT - River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016
A2 - Constantinescu, George
A2 - Garcia, Marcelo
A2 - Hanes, Dan
PB - CRC Press/Balkema
T2 - International Conference on Fluvial Hydraulics, RIVER FLOW 2016
Y2 - 11 July 2016 through 14 July 2016
ER -