多沙河流水库自校正排沙运用研究

Self-calibration desilting operations of reservoirs on sediment-laden rivers

根据多沙河流水少沙多、水沙量多集中于汛期的特性,提出了多沙河流水库自校正排沙运用模式。该模式采用一维水沙数学模型确定水库运用后的状态。以设计的供水量和剩余库容为目标,根据来水来沙条件自动修正水库运用参数,实现对供水量和剩余库容的轨迹跟踪,达到既满足水库的排沙效果,又最大程度蓄水的目的。最后,将该运用模式应用于实际水库的控制运用,结果表明,自校正排沙运用方式能较好适应水库的来水来沙条件,能在保证供水量的条件下,尽可能提高水库的剩余库容,可为相关部门提供参考。

Based on the characteristics of the sediment-laden rivers, i.e. less water with more sediment and the heavy sedimentation is mostly concentrated in flood season, a self-calibration desilting operation mode for the reservoirs on the sediment-laden rivers is put forward herein. For this mode, the condition after the operation of reservoir is determined with a one-dimensional flow and sediment model. Taking the designed water supply and the remained reservoir storage as the targets, the trace tracking of both the water supply and the remained reservoir storage are realized by means of correcting the reservoir operation parameters in time according to the water and sediment inflow condition, and then, not only the desilting capacity of the reservoir is satisfied, the target of the maximum water impoundment can also be got. Finally, the mode is applied to the controlled operation of Tingkou Reservoir in Shaanxi Province; form which the result shows that the water and sediment inflow condition of the reservoir can be better adapted by the operation mode and the remained reservoir storage can be enhanced as much as possible under the condition to ensure the water supply concerned, therefore, it can be taken as a reference for the related sectors as well.