汾河水库及河道泥沙冲淤数学模型

A numerical model for sedimentation in Fenhe reservoir and the adjoining reaches

运用不平衡输沙理论建立汾河水库及河道泥沙冲淤数学模型,在建立挟沙力公式、概化冲淤断面和计算方法等方面作了些新尝试,并且把非线性规划中的优化方法运用到了模型验证计算的参数调试中,用汾河水库长系列和典型水沙过程以及太原河段长系列水沙过程对水库淤积和河道变形进行了预测,计算结果与实测值基本相符。

In this paper,a numerical model for sedimentation in Fenhe Reservoir and the adjoining reaches has been presented on the basis of the theory of non-equilibrium sediment transport.The model is calibrated by using a part of the sediment data collected for Fenhe Reservoir and checked by simulating the remaining data.Moreover,the method of optimization in nonlinear programming has been applied to determine the basic parameters of the model applying a concept of fuzzy mathematics to formulate the objective functions.The computed amounts of reservoir deposition and channel deformation are found to be substantially in agreement with the values observed.