Hydraulic Modeling of Bridges in Two-Dimensional Shallow Water Models
Publication: Journal of Hydraulic Engineering
Volume 148, Issue 8
Abstract
The backwater effect generated by bridges can significantly increase the risk of flooding. In this work we compare two different methods to include the effect of bridges in two-dimensional (2D) shallow water models. The first method is based on empirical discharge equations that are implemented as internal conditions. The second method is the recently proposed 2D extension of the two-component pressure approach, which accounts for the vertical confinement of the flow. Both approaches are tested and compared using a new set of experimental data obtained in 32 laboratory tests, including four different bridge geometries under different flow conditions. The results show that both methods can reproduce the observed bridge afflux for a wide range of flow conditions, but the two-component pressure approach is less dependent on model calibration. On the other hand, both methods fail to correctly reproduce the 2D water depth patterns observed around the bridge.
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Data Availability Statement
All the experimental data generated during the study are available in a repository online in accordance with funder data retention policies (Cea et al. 2021).
All the numerical models that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study received financial support from the Spanish Ministry of Science, Innovation and Universities (Ministerio de Ciencia Innovacion y Universidades) within the project “VAMONOS: Development of non-hydrostatic models for environmental hydraulics. Two dimensional flow in rivers” (reference CTM2017-85171-C2-2-R).
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Published In
Journal of Hydraulic Engineering
Volume 148 • Issue 8 • August 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jul 22, 2021
Accepted: Mar 11, 2022
Published online: May 18, 2022
Published in print: Aug 1, 2022
Discussion open until: Oct 18, 2022
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