Abstract
The numerical simulation of sediment transport in the Yellow River estuary is an important method to quantitative analyze the problems by water and sediment movement, including sediment deposition and river bed evolution, beach deposition and development, the formation and development of the delta, and so on. Making an intensive study of the problems is useful to study the principles of sediment movement and the evolution law of the estuary bed, and it is also important significance to scientific demonstrate of the estuary sediment deposition, sea water intrusion prevention treatment scheme and solve the problems of engineering. Based on the mathematical modeling of sediment transport and our research work, this paper analyzes the research statement, the unsolved issues and the developed trend of this kind problem, to provide the theoretical reference on more accurate numerical simulation of sediment transport in the Yellow River estuary and the scientific reference on the demonstration and decision of estuarine regulation scheme.
Highlights
The mathematical model of sediment transport of estuary is a branch of river simulation
It is an important method to quantitatively predict the problems caused by water and sediment movement, including river bed evolution, formation and development of deltas, expansion of siltation areas, transport and deposition of silt and sediment, and so on
With the rapid development of modern computing technology, especially parallel computing technology, compared with traditional simulation methods such as measured model and physical similarity model, the numerical simulation of sediment transport by using mathematical model has the advantages of low investment, short cycle, repeatability, and easy improvement, which has become an important method of estuary simulation
Summary
The mathematical model of sediment transport of estuary is a branch of river simulation. The sediment content in the practical problem is generally non-uniformly distributed along the water depth, and the sediment transport presents a typical three-dimensional property At this time, the three-dimensional mathematical model can simulate the sediment transport and sedimentation law more accurately and completely. Considering the influence of turbulence, tidal current, wave and the assumption of hydrostatic pressure distribution, By performing Reynolds average, wave period average and water depth average on the threedimensional sediment transport model, a planar two-dimensional sediment transport model composed of hydrodynamic model (water flow continuous equation, water flow movement equation) and sediment transport model (sediment continuous equation, riverbed deformation equation) can be obtained (Yang, 1993; Dou, Dong, Dou & Li, 1995; Cao & Wang, 1993)
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