西江中上游型洪水影响下龙滩水库调度特性初探

发布时间：2018-11-25 10:11

【摘要】：为探讨龙滩水库对西江中上游型洪水的防洪削峰作用,选取"96·7"中上游型洪水作为典型洪水,拟定4种龙滩水库调度方案,采用率定和验证后的西江中游河网及梯级水库水动力数学模型,分别对典型洪水及频率为0.2%、1%和2%水文条件下的4种梯级水库调度方案进行了模拟计算和分析。结果显示,该水动力学模型能很好地模拟洪水特性参数的时间变化规律以及水库的运行调度过程;对于"96·7"典型中上游型洪水,由于红水河洪水较小,梧州断面流量以柳江来水为主,龙滩水库调度对梧州断面削峰效果有限;但针对中上游型不同频率的大洪水,采用提前启用龙滩水库的调度方案能有效削减梧州断面的洪峰值;其中,龙滩水库采用发电流量控泄的方案可以达到防洪和发电效益的统一。
[Abstract]:In order to study the flood control and peak cutting effect of Longtan reservoir on the middle and upper reaches of the Xijiang River, the "967" flood in the upper and middle reaches is selected as the typical flood, and four kinds of operation schemes of the Longtan reservoir are worked out. By using the hydrodynamic mathematical models of Xijiang middle reaches river network and cascade reservoir after rate determination and verification, the typical flood and four kinds of cascade reservoir operation schemes under hydrological conditions of 0.2% and 2% were simulated and analyzed respectively. The results show that the hydrodynamic model can well simulate the time variation of flood characteristic parameters and the operation process of reservoir. For "967" typical upstream flood, due to the small flood of Hongshui River, the discharge of Wuzhou section is mainly from Liujiang River, and the regulation of Longtan Reservoir has limited effect on cutting peak of Wuzhou section. But in view of the flood of different frequency in the upper and middle reaches, the Hong Feng value of Wuzhou section can be effectively reduced by using the dispatching scheme of Longtan reservoir in advance. Among them, Longtan Reservoir can achieve the unity of flood control and power generation benefit by adopting the scheme of power generation flow control and discharge control.
【作者单位】：珠江水利科学研究院水利部珠江河口海岸工程技术研究中心;
【基金】：国家自然科学基金项目(51309263,51309264) 广州市珠江科技新星专项(2014J2200067)
【分类号】：TV697.1

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