水库联合调度在堰塞湖排险处置中的作用研究

Study on joint regulation of reservoirs in danger- removal and treatment of dammed lake

2014年8月3日,云南鲁甸县6.5级强震在牛栏江干流形成了大型堰塞湖,应急排险和处置施工的难度较大。基于干、支流多个水文监测点的观测数据,对牛栏江已建的4个水库、电站实施了联合调度。利用上游德泽水库实施洪水拦蓄并削减洪峰,有效减少了堰塞湖的防洪压力。对小岩头电站实施严格管理,遇特殊水情时保持上游来水与下泄水量一致。对下游天花板电站、黄角树电站实行空库度汛,确保溃坝险情出现时具备拦洪功能。经过6次联合调度以及3个多月的后续处置,有效减小了堰塞湖上、下游防洪压力,保障了下游沿岸集镇安全。

6.5 magnitude Ludian earthquake struck Ludian County, Yunnan Province on 3 August in 2014 and generated a large scaled dammed lake on the mainstream of Niulan River, bringing along difficulties for the emergency danger- removal and treatment. On the basis of the measured data of multiple hydrological stations on stem Niulanjiang River, a joint regulation scheme containing 4 reservoirs was conducted. The flood control pressure of the dammed lake was mitigated by using upstream Deze Reservoir to retain the flood and reduce the peak. The strict regulation on Xiaoyantou Hydropower Station is to make the in- coming discharge equal to the releasing discharge under special water regime. Tianhuaban Hydropower Station and Huangjiaoshu Hydropower Station in downstream were emptied to ensure their flood storage function in dam break situation. After 6 times of joint regulation and the following up treatment for 3 months, the flood control pressure was reduced effectively and the safety of downstream area was guaranteed.