One of the challenging issues in surface water resources management is the optimal operation of multi-dam systems. In addition to the applicability in determining the optimal pattern of operation of existing dams, this approach can be implemented in specifying the optimal capacity of under design dams. In this research, the simulation–optimization technique is used along with the reservoir zoning method in order to specify the optimal role curve of each of the dams in a multi-dam system (i.e., the Marun and Jarreh dams) in monthly intervals. The objective of this study is to develop a multi-objective algorithm on the basis of the zoning of reservoirs for the optimal operation of multi-dam systems. In this technique, instead of increasing the reliability of supplying demands in the whole period regardless the dry months, some of the inflow of rainy periods is stored in dam reservoirs to be consumed in dry months in order to mitigate the severity of deficiency. To examine the efficiency of the proposed model, the results obtained from the system operation in the current conditions are compared under two scenarios including optimal and reference. In the reference scenario, during 30-years, in some dry and low-water years, especially in the last six years of planning, the percentage of the demand supply is zero or less than five percent in several consecutive months. After optimizing the system, the minimum supply percentage in critical and dry months reaches 30 to 60 percent. Also, in the optimization scenario, the percentage of downstream ecological demands is improved. This research indicates that using the solution of this research leads to the better management of reservoirs in multi-dam systems and reduces the severity of deficiency in supplying various uses in low-water months.

地表水资源管理中具有挑战性的问题之一是多坝系统的最佳运行。除了在确定现有大坝的最佳运行模式时具有适用性外，这种方法还可以在指定在设计中的大坝的最佳容量时实施。在这项研究中，模拟优化技术与储层分区法一起使用，以便以月为间隔指定多坝系统（即 Marun 和 Jarreh 大坝）中每个大坝的最佳角色曲线。本研究的目的是在水库分区的基础上开发一种多目标算法，以实现多坝系统的最佳运行。在这种技术中，无论干旱月份如何，它都不会提高整个时期供应需求的可靠性，而是将一些雨季流入的水储存在大坝水库中，以便在干旱月份消耗，以减轻短缺的严重性。为了检验所提模型的效率，在两种情景下（最优和参考）下比较了系统在当前条件下运行的结果。在参考情景中，在 30 年中，在一些干旱和低水位年份，尤其是在最近 6 年的规划中，供需百分比连续几个月为零或低于 5%。优化系统后，关键和干旱月份的最低供应百分比达到 30% 至 60%。此外，在优化场景中，下游生态需求的百分比得到提高。 这项研究表明，使用本研究的解决方案可以更好地管理多坝系统中的水库，并降低低水位月份各种用途供应不足的严重性。