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水库建成以后,下游河床为了适应新的来水来沙条件,常常发生河型的改变、河床的横向变形及河床的纵向变形等。由于这些变化直接影响到国民经济建设各方面,因此不仅要求定性地指出这些变化的发展趋势,而且还要定量地解决问题。目前泥沙研究一般用全面的资料分析、理论研究及模型试验等方法来回答河型改变及横向变形问题,并参考这些研究成果用河床变形计算方法回答纵向变形问题。本文涉及范围
After the reservoir is completed, the downstream riverbed often undergoes river type changes, lateral riverbed deformations, and longitudinal riverbed deformations in order to adapt to the new water and sand conditions. Since these changes have a direct impact on all aspects of national economic construction, they not only require qualitatively pointing out the development trend of these changes, but also solve the problems quantitatively. At present, sediment research generally uses the methods of data analysis, theoretical research and model tests to answer the questions of river type change and transverse deformation. With reference to these research results, the deformation of riverbed deformation is solved by the riverbed deformation calculation method. This article covers the scope