| In our country, There are much send in the rivers. The movement of sediment not only has something to do with the development and evolution of rivers themselves but also influences the success of the hydraulic engineering projects. During the process of the river basin planning, design of flood control, soil and water conservation, water resources protection, the flow-sediment problem is must be considered. Therefore, The study of flow-sediment mathematical model plays an important role in the rivers.Based on "HydroInfo" information system, 1D and 2D coupled Flow-Sediment mathematical model was established.Also,Applied simulated method to study rivers accurately and effectively. In this model, one dimensional river network and two dimensional basin are same systems to be dealed with. Thus, Both of them take advantages well to solve engineering problems of channel deposit and River Bed Evolution.In this HydroInfo Information system, Finite volume method which keeping precision is used to discrete and solve the flow-sediment control equation and river-bed revolution control equation. All kinds of empirical formulas are analysised so as to deal with some key problems, parameters are adopted reasonable, So, this model is true and reliable.The models of Pearl river delta river network flow-sediment, Bohai tide are built, Though compared with measured results the results are well agreed with filed data,And the simulation results can provide evidence for the rationality analysis of projection and correlation study.Last, Established model is applied to the flow-sediment research of JingHong power station Based on filed data, parameters are decided. Also, the evolution of river bed of the channel in the 2007 are analysed, the results are well. Under the different flows condition, depth distribution, velocity distribution and sediment concentration distribution are calculating, as to provide a scientific dependencies for feasible evaluation...
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