To understand the river hydrodynamics, such as varying water levels or flooding, the basic knowledge of the characteristics of the flow and the transport processes of sediment is required; this knowledge is provided in the following order:
- Basics of one-dimensional uniform channel flow. Gradually varied flow. Solution methods-calculation of water surface profiles: Standard-Step method; Direct-Step method – Introduction to the HEC-RAS model; applications.
- Unsteady flow. Equations Saint-Venant and their simplifications (kinematic and diffusion wave). Solution of the Saint-Venant equations using the Finite Difference Method. Application to a simplified flood propagation problem.
- Flash-floods and dam-break waves. Mathematical modelling of floods; use of the HEC-RAS model.
- Sediment transport: physical properties of sediment; basics of bedload and suspended load sediment transport. Mathematical modelling of sediment transport. Use of the HEC-RAS model; sediment hydrodynamics (quasi-steady flow); sediment continuity equation; physical constraints to erosion and deposition (sorting and armouring).