满足多目标优化的人工开挖蓄洪区规划与研究

Planning and Research of the Multi-Objective Optimal Man-Made Flood Storage Area

以南海子蓄洪区为研究对象,建立蓄洪区的一二维耦合模型,通过多方案比选和糙率敏感性分析,优化了工程的规划方案和调度规则,使得人工开挖蓄洪区能满足防洪、生态、景观、用地、管理等多方面要求。另外,对一二维耦合模型和一零维耦合模型的模拟结果进行了对比分析,并总结了后者代替前者应用于类似工程的特性或规律。结果表明:对于流态不受湖区水力坡降和河湖间水流的动量传导这两种因素驱动的工况,一零维耦合模型经合理概化,可以替代一二维耦合模型应用于工程项目的前期阶段,在保证成果合理精确的同时,可大大提高模拟计算效率。

Taking Nanhaizi flood storage area as a study object, a flood storage area 1D & 2D coupling model was built to optimize the planning scheme and scheduling rules by plan comparison and sensitivity analysis on roughness coefficient, so that the man-made flood storage area could meet multi-objective requirements like flood control, ecology, landscaping, saving space, flood regulation, etc.In addition, this paper compared the simulation results of 1D &0D coupling model with results of 1D &2D coupling model.The conclusion shows that if flow between rivers and lakes is not mainly driven by hydraulic slope or momentum transfer, a reasonable generalized 1D&0D coupling model can replace 1D&2D coupling model in the early stage of project, with the results of accurate and high efficient at the same time.