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滨海流域进行实时预报调度时,通常建立将水库调度模型与下游感潮河段水位演算模型相结合的综合调度系统,以福建省山仔水库为例,利用主要控制断面的安全水位作为控制条件决定水库的放水过程。由于感潮河段受上游出库洪水与下游潮位的双重影响,河道水位出现复杂的周期性变化,采用以洪潮分离为出发点的双向波演算法构建感潮河段的水位演算模型,并结合感潮河段的水位变化趋势,考虑水库洪峰来临及下游河段相应时期高低潮位过程,动态调整水库下泄量,以提高下游河道的防洪标准。
When carrying out real-time forecast and scheduling in coastal watershed, an integrated dispatching system is usually established which integrates the reservoir dispatch model and the downstream tidal river level calculation model. Taking Shazizi Reservoir in Fujian Province as an example, the safety level of the main control section is taken as the control condition Reservoir discharge process. Due to the double influence of upstream flood discharge and downstream tide level, the tidal level of river has complex periodic changes. Based on the two-way wave algorithm which takes flood tide separation as the starting point, the water level calculation model of tidal reach is constructed and combined In order to improve the flood control standards of downstream rivers, the discharge level of reservoirs should be adjusted dynamically considering the process of flood peak and the process of high and low tides in the corresponding lower reaches of the river.