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以宁夏银北灌区为例,基于大系统分解协调原理建立了地表水地下水联合运用的递阶优化模型。子系统优化模型采用增量动态规划法求解,协调层利用目标协调法和关联预估法实现全局最优,获得不同约束方案下的时段最优引黄水量、井灌水量、井排水量和运行费用。所建模型及求解方法弥补了以往水资源配置模型只考虑地下水垂向运动,忽略水平运动的不足,改善了模型的仿真性和决策的可靠性。
Taking Yinbei Irrigation District in Ningxia Province as an example, a hierarchical optimization model for the combined use of surface water and groundwater was established based on the principle of large-scale system decomposition and coordination. The subsystem optimization model is solved by incremental dynamic programming. The coordination layer uses the target coordination method and the correlation estimation method to achieve the global optimum. The optimal yellowing time, well irrigation volume, well displacement and operation cost under different constraints are obtained . The modeling and solving methods make up for the deficiencies of water resources allocation model considering only vertical movement of groundwater and ignoring horizontal movement, which improves the simulation of the model and the reliability of decision-making.