Simulation of dike-break processes in the Yellow River

L Liang, Jun Ni, AGL Borthwick, BD Rogers

Research output: Contribution to journalArticlepeer-review

Abstract

Although dike-break and dam-break processes have similar unsteady and discontinuous hydrodynamic characteristics, there are significant differences. In general, dam-break simulations focus on the flood discharge, whereas dike-break simulations are required to provide detailed information on the hydraulic and breach evolution processes, such as pit-scour and breach-expansion. In order to overcome the difficulties inherent in applying existing dam-break models to dike-breaks, this paper presents an integrated model that combines the shallow water, sediment transport, riverbed deformation and breach-expansion equations. A Godunov-type finite volume method is used for the flow simulation, based on a fixed quadtree grid system. The hydrodynamic aspects of the model are validated for an idealized rectangular dam break. A representative reach in the Yellow River is selected at a location where there is a significant risk of a dike-break, and full-scale topographic and hydrologic data are available. Typical dike-break processes are successfully simulated, with predicted hydraulic characteristics and terrain changes qualitatively in agreement with laboratory data. The modeling study is of practical importance for implementation of engineering countermeasures in the Yellow River, such as breach blocking and head wrapping.

Original languageEnglish
Pages (from-to)606-619
Number of pages14
JournalScience in China Series E: Technological Sciences
Volume45
Issue number6
Publication statusPublished - Dec 2002

Keywords

  • Yellow River
  • dike-break
  • shallow water
  • Godunov
  • finite volume
  • breach
  • SHALLOW-WATER EQUATIONS
  • GODUNOV-TYPE SCHEME

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