摘要
新疆玉龙喀什水库水流含沙较高,运用后期库区淤积严重。基于水库泥沙物理模型试验结果,研究不同条件下的水库深孔排沙洞排沙产生的坝前冲刷漏斗,分析不同的坝前水位、冲刷流量、运行方式与排沙效果的关系,并找出影响泄洪排沙洞排沙效率的主要因素。结果表明,坝前水深和冲刷流量是影响排沙效率的主要因素,开启发电洞不影响水库清淤,降低坝前水位和增加出库流量均有利于冲刷效率的提高,在坝前水位为2080 m、下泄流量为676 m^(3)/s时形成的冲刷漏斗冲刷效果最好。研究结论为解决该水库淤积速率过快和水库清淤提供了参考。
The water flow of the Yulong Kashi Reservoir in Xinjiang contains a relatively high amount of sediment,and the siltation in the reservoir area is severe in the later stage of operation.Based on the results of sediment physical model tests,this paper studied the erosion funnels in front of the dam caused by sand discharge from deep hole sand dis-charge tunnels of reservoirs under different conditions.The relationship between water levels in front of the dam,scour flow rates,operational modes,and sediment discharge efficiency was analyzed.The main factors influencing the sediment discharge efficiency of flood discharge tunnels were obtained.The results indicate that water depth in front of the dam and scour flow rate are the primary factors affecting sediment discharge efficiency.Opening the power generation tunnel does not impact the reservoir's silt removal process.Reducing water level in front of the dam and increasing the outflow rate both contribute to improved scouring efficiency.The scouring effect is optimal when the water level in front of the dam is at 2080 m and the discharge flow rate is 676 m^(3)/s,forming a scouring funnel.The conclusions of this study provide ref-erence for addressing the rapid siltation rate and reservoir silt removal in this reservoir.
作者
孙书琪
董占地
王志国
SUN Shu-qi;DONG Zhan-di;WANG Zhi-guo(School of Water Conservancy and Hydroelectric Power,Hebei University of Engineering,Handan 056038,China;Hebei Key Laboratory of Smart Water Conservancy,Hebei University of Engineering,Handan 056038,China;Provincial-Ministerial Collaborative Innovation Center for Smart Water Regulation and Integrated Management,Hebei University of Engineering,Handan 056038,China;China Institute of Water Resources and Hydropower Research,Beijing 100048,China)
出处
《水电能源科学》
北大核心
2025年第12期73-77,共5页
Water Resources and Power
基金
国家自然科学基金项目(U22A20237)。
关键词
模型试验
水库清淤
冲刷漏斗
排沙效率
影响因素
model experiment
reservoir dredging
scouring funnel
sediment discharge efficiency
influencing factor
