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与多目标水库短期调度中有关的几个问题中最主要的是未来径流预报的不准确性，而径流预报结果直接影响水库调度的效果．水库运行特性是调度线的函数，水库调度线与水库运行控制和入库径流预报的可靠性之间存在着密切关系．随着预报期的延长，径流预报的准确度降低，误差加大．在径流通报的时序过程中，各时段预报值的误差是不相同的，愈接近面临时刻的值准确度意高．依此求得的水库调度方案在实际运行调度中难以达到预期目的．当径流预报完全准确时，水库调度模型所产生的调度方案是最理想的．本文提出将调度期看成是实时变化的决策变量．该方法综合考虑沁记杨度方案入流债报的较高可靠性和较长时期调度方案的趋势控制作用．将其用于美国肯塔基州格林水库模拟调度，取得显巨效果．
The most important issue in the short-term dispatch of multi-objective reservoirs is the inaccuracy of future runoff forecasting, and the runoff forecast results directly affect the effect of reservoir dispatching. Reservoir operating characteristics are a function of the dispatch line. There is a close relationship between the reservoir dispatch line and the reservoir operation control and the reliability of incoming runoff prediction. With the extension of the forecast period, the accuracy of runoff forecast decreases and the error increases. In the sequence of runoff notification, the errors of forecasting values in different time periods are different, and the closer the value to the moment of arrival is, the higher the accuracy is. In this way, the reservoir scheduling scheme can not achieve the expected purpose in actual operation scheduling. When the runoff forecast is completely accurate, the scheduling scheme generated by the reservoir scheduling model is the best. This paper proposes to consider the scheduling period as a decision variable in real time. The method takes into account the higher reliability of the inflow debt of Qin Yang Yang scheme and the trend control of the long-term scheduling scheme. It will be used for simulation dispatch of Greenland Reservoir in Kentucky in the United States and achieved significant results.