A new approach for finding a cost-effective combination of groynes in a channel bend for the prevention of bend scour is presented. A linked simulation–optimisation model is proposed for this purpose. The morphological flow simulation model was developed by solving the shallow-water equations and the Exner sediment continuity equation in a boundary-fitted coordinate system. The optimisation model was developed utilising a binary-coded genetic algorithm. The proposed model can automatically provide a cost-effective groyne series in terms of their number, length and position in any vulnerable channel bend. A constraint in terms of bend scour is also incorporated in the optimisation model, which allows the optimisation model to obtain the best groyne combination for no bend scour. To appraise the performance of the model, it was applied to a hypothetical vulnerable channel bend. The model produced the minimised cost of installation of the groyne system at that location, at the same time as making the location free from bend scour.

中文翻译：

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最佳groyne系列作为河弯冲刷对策

提出了一种新方法，用于在渠道弯道中寻找具有成本效益的 groynes 组合，以防止弯道冲刷。为此，提出了一个链接的模拟优化模型。形态流模拟模型是通过在边界拟合坐标系中求解浅水方程和 Exner 沉积物连续性方程而开发的。优化模型是利用二进制编码的遗传算法开发的。所提出的模型可以自动提供具有成本效益的 groyne 系列，其数量、长度和在任何脆弱通道弯曲中的位置。优化模型中还包含弯曲冲刷方面的约束，这允许优化模型获得无弯曲冲刷的最佳groyne 组合。为了评估模型的性能，它被应用于假设的脆弱通道弯曲。该模型使该位置的 groyne 系统安装成本最小化，同时使该位置免于弯曲冲刷。