The Sediment Mathematical Model And Its Application In Xijiang Waterway Regulation

It is based on the systematic analysis of the developing history and the present situation of the sediment mathematical model in this paper.It is dependent on West transportation Science and Technology Project—Study on Xijiang River between Wuzhou andYunan waterway project key technology, and developed a 1-D mathematical flood routing model for unsteady flow and total sediment model. The model will simulate the flood evolution, qualitative analysis tide, key position to the downstream route influence, and the silt's space and time distribution in the different situation.There are six chapters, as follows:Chap 1: The present research situation, the numerical scheme of the 1-D flow and sediment model are concluded, and the main work of the paper is put forward.Chap 2: Outlines of the situation of Xijiang-River, the existence information is adopted to carry on the qualitative fluvial process. The intrinsic reason of shoal forms is revelated, and the improvement thought is proposed. The navigationable depth and the improvement-line width are determined.Chap 3: A new mathematical unsteady flow model is established, which based on the linear Preissmann scheme, with the variables of Q and Z. The flood evolution, the unsteady flow, the tide, the level and width are simulated.Chap 4: Based on the experiment, with current form Strength Index, deduced Sediment transport rate formula. Also on the basis of Professor Wang formula (Xi'an University of Technology) established the resumption of saturated coefficients formula.The experiment and hydrological data is adopted to process key questions, then the total sediment mathematical model is established.Chap 5: Based on Model confirmation, the different operating silt mode are calculated,and calculates the silt change in downstream by SMS. Then qualitative influence one channel condition is analysed.Finally, Sums up the whole paper and further research work is prospected.