Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Levees may fail due to overtopping, pipping, or slope stability; overtopping being the most common cause of failures. Levee failure may result in catastrophic property damage and loss of life. An accurate prediction of the development of a breach, breach outflow, and the resulting flow field is needed for emergency preparedness and for flood-damage mitigation. The levee failure process is complex involving interaction between the water flow, sediment transport and the corresponding geomorphological changes.
In this chapter, the estimation of breach flows in a non-cohesive earthen levee and the modeling of the temporal development of a levee breach caused by overtopping are discussed. Numerical modeling of the levee breach process is based on the numerical solution of the two-dimensional shallow water equations simultaneously with the sediment-mass-conservation equation in which a new source term is included to account for the slumping failure. Levee breach with constant cross section through rectangular and trapezoidal channels are studied. Different cases are simulated by varying the breach width, the submergence of the breach crest, and the inflow to the main channel. The numerical model is validated by comparing the computed results with the laboratory test data.
Levees may fail due to overtopping, pipping, or slope stability; overtopping being the most common cause of failures. Levee failure may result in catastrophic property damage and loss of life. An accurate prediction of the development of a breach, breach outflow, and the resulting flow field is needed for emergency preparedness and for flood-damage mitigation. The levee failure process is complex involving interaction between the water flow, sediment transport and the corresponding geomorphological changes.
In this chapter, the estimation of breach flows in a non-cohesive earthen levee and the modeling of the temporal development of a levee breach caused by overtopping are discussed. Numerical modeling of the levee breach process is based on the numerical solution of the two-dimensional shallow water equations simultaneously with the sediment-mass-conservation equation in which a new source term is included to account for the slumping failure. Levee breach with constant cross section through rectangular and trapezoidal channels are studied. Different cases are simulated by varying the breach width, the submergence of the breach crest, and the inflow to the main channel. The numerical model is validated by comparing the computed results with the laboratory test data.
LEVEE BREACH MODELING
Chaudhry, M. Hanif (Autor:in)
Open-Channel Flow ; Kapitel: 16 ; 461-488
01.01.2022
28 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Calculation of Levee-Breach Widening Rates
| NTIS | 2022
Levee Breach Inundation Study, Sacramento County, California
| British Library Conference Proceedings | 1993