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河工模型是解决工程泥沙问题的重要研究手段。为了保证模型中水流泥沙运动与原型的相似关系,要求按原型中的流量、水位、含沙量和输沙率的变化过程对模型进行控制。但是,在目前的河工模型试验中,为了操作方便,常将连续变化的过程简化为若干阶梯形,在各阶梯内控制稳定的流量、水位、含沙量和输沙率。这样,使模型中的
River model is an important research method to solve the sediment problem in engineering. In order to ensure the similarity between the flow and sediment movement in the model and the prototype, it is required to control the model according to the change of the flow, water level, sediment concentration and sediment transport rate in the prototype. However, in the current river model tests, for the sake of convenience, the process of continuous change is simplified to a number of step shapes, and stable flow rate, water level, sediment concentration and sediment transport rate are controlled in each step. This way, make the model