Analysis of the performance of different culvert boundary conditions in 2D shallow flow models

Culverts allow roads to safely traverse small streams or drainage ditches, and their proper design is critical to ensure a safe and reliable transportation network. A correct modelization of these hydraulic structures becomes crucial in the assessment of flood footprints or discharge peak estimation...

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Veröffentlicht in:Journal of hydroinformatics Jg. 22; H. 5; S. 1093 - 1121
Hauptverfasser: Fernández-Pato, J., Martínez-Aranda, S., Morales-Hernández, M., García-Navarro, P.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London IWA Publishing 01.09.2020
Schlagworte:
Boundary conditions
Computational grids
Computer applications
Culverts
Design
Discharge
Ditches
Drainage ditches
ENVIRONMENTAL SCIENCES
Finite element method
finite volumes
flood
Floods
Flow velocity
Hydraulic models
Hydraulic structures
Hydraulics
Mathematical models
Numerical models
Risk assessment
Sensitivity analysis
Shallow water
shallow-water equations
Software
Streams
Surface flow
Transportation networks
Two dimensional analysis
Two dimensional flow
Two dimensional models
ISSN:1464-7141, 1465-1734
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Zusammenfassung:Culverts allow roads to safely traverse small streams or drainage ditches, and their proper design is critical to ensure a safe and reliable transportation network. A correct modelization of these hydraulic structures becomes crucial in the assessment of flood footprints or discharge peak estimation in a risk evaluation plan. The question of how to include culverts comes up frequently when assembling a hydraulic model that requires the presence of as many singular elements as possible. In this work, three different culvert integrations with the surface domain are studied and compared in the context of a 2D shallow water (SW) model. All of them are based on the Federal Highway Administration (FHWA) formulation for the culvert discharge estimation but differ in complexity and in the interaction with the numerical model for surface flow, some of them as internal boundary conditions. Several steady and unsteady validation test cases are presented and the numerical results are compared with the predictions from HEC-RAS 1D and HY-8 software. The culvert area, shape and their sensitivity to the 2D computational mesh is also analyzed.
Bibliographie:ObjectType-Article-1
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USDOE
AC05-00OR22725
ISSN:1464-7141
1465-1734
DOI:10.2166/hydro.2020.025