NEW DEVELOPMENT IN NUMERICAL SIMULATION OF THE TIDAL BORE

摘要

Using Godunov-type scheme with water level-bottom topography formulation, the 2-D shallow-water equations with bottom topography can be solved. The Riemann solution of dry bed problem is applied to solve moving boundary. Based on verification of the typical shallow transcritical flows(Pan et al., 2003), the mathematical model is applied to simulate the formation, evolution and dissipation of the tidal bore on the Qiantang River. A good agreement is made between the computed and field measurements, and it also numerically replicates the phenomena of the intersecting, reflection of the tidal bores, line-type tidal bore, which leads to more understanding about the tidal bores on the Qiantang River.