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在天然河道水面曲线计算中 ,传统的试算法或迭代法存在计算误差的累积问题 .为此 ,文中指出 ,天然河道水面曲线计算的优化问题 ,实质上就是全河段总计算误差最小化问题 ,据此同时确定各断面的水位值 ;从而提出了用加速遗传算法来处理这一仅给出隐含表达式的复杂非线性优化问题 .实例计算的结果说明了这一新方法是可行的、通用的和简便的 ,有效控制了全河段的总计算误差
In the calculation of surface course of natural river, traditional trial or iteration method has the problem of accumulation of calculation errors.Therefore, it is pointed out that the optimization of natural river surface curve calculation is essentially the problem of minimizing the total calculation error of the whole river, Based on this, the water level of each section is determined at the same time. Thus, an accelerated genetic algorithm is proposed to deal with the complex nonlinear optimization problem which only gives the implicit expression. The result of example calculation shows that this new method is feasible, And simple, effective control of the entire river section of the total calculation error