断面间距对黄河下游高含沙洪水模拟结果影响
[Abstract]:According to the characteristics of the lower reaches of the Yellow River and the characteristics of flood routing with high sediment content, a one-dimensional mathematical model of non-uniform sediment flow with unsteady flow is established based on the coupled solution. The model is used to calculate the flood process of high sediment concentration in August 2004 in the lower Yellow River and the model is verified by the measured water and sediment data. The results show that the calculated values of discharge and sediment content of hydrologic stations are in good agreement with the measured values and the model can be used to simulate the flood routing and scour and deposition process of high sediment content. The model is used to calculate the high sediment flood process in the same field under the condition of different cross-section spacing, and the calculation results under different cross-section spacing are analyzed. The analysis shows that the calculation accuracy of one-dimensional model is influenced by different cross-section spacing. Under the same calculation boundary conditions and other parameters, the influence of cross-section spacing on discharge and water level is relatively small. The effect on sediment content and the process of river course scouring and silting is obvious. In the case of complex topography and characteristics of water and sediment in the lower reaches of the Yellow River, the influence of cross-section spacing should be taken into account when calculating the flood process of high sediment by using one-dimensional mathematical model.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;华北水利水电大学水利学院;
【基金】：国家自然科学基金资助项目(51379156;51579186) 水利部公益性行业科研专项经费资助项目(201401038)
【分类号】：TV149
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