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A platform for research: civil engineering, architecture and urbanism
Analysis of Dam Breaching Flood Routing
Flood risk is closely related to the flood severity in flooded areas. The flood severity can be evaluated through a flood routing simulation. This chapter introduces the river hydraulics and numerical models for flood simulation. The Navier‐Stokes equations for an incompressible fluid are the core for most unsteady flow routing computer simulations. The governing equations of the most widely used one‐dimensional (1D) models are Saint‐Venant equations. Most widely used 2D codes utilize depth‐averaged Navier‐Stokes equations, commonly called the Saint‐Venant shallow water equations. A typical 1D model for flood routing is HEC‐RAS, where water surface profiles are computed from one cross‐section to the next by solving the energy equation. A typical 2D model for flood routing is FLO‐2D, which evolved from the diffusive hydrodynamic model (DHM). The chapter also presents a case study to demonstrate the application of a numerical model: application of HEC‐RAS to simulate the dam breaching floods in Tangjiashan.
Analysis of Dam Breaching Flood Routing
Flood risk is closely related to the flood severity in flooded areas. The flood severity can be evaluated through a flood routing simulation. This chapter introduces the river hydraulics and numerical models for flood simulation. The Navier‐Stokes equations for an incompressible fluid are the core for most unsteady flow routing computer simulations. The governing equations of the most widely used one‐dimensional (1D) models are Saint‐Venant equations. Most widely used 2D codes utilize depth‐averaged Navier‐Stokes equations, commonly called the Saint‐Venant shallow water equations. A typical 1D model for flood routing is HEC‐RAS, where water surface profiles are computed from one cross‐section to the next by solving the energy equation. A typical 2D model for flood routing is FLO‐2D, which evolved from the diffusive hydrodynamic model (DHM). The chapter also presents a case study to demonstrate the application of a numerical model: application of HEC‐RAS to simulate the dam breaching floods in Tangjiashan.
Analysis of Dam Breaching Flood Routing
Zhang, Limin (author) / Peng, Ming (author) / Chang, Dongsheng (author) / Xu, Yao (author)
2016-06-03
18 pages
Article/Chapter (Book)
Electronic Resource
English
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