梨园—阿海混合式抽水蓄能电站库区泥沙淤积预测  

Prediction of Sediment Deposition in the Reservoir Area of Liyuan-Ahai Hybrid Pumped Storage Hydropower Station

作　　者：刘勇 王超兴 唐孟 LIU Yong;WANG Chaoxing;TANG Meng(Power China Kunming Engineering Corporation Limited,Kunming 650000,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南省昆明市650000

出　　处：《水电与抽水蓄能》2024年第4期33-39,共7页Hydropower and Pumped Storage

基　　金：国家自然科学基金黄河自然科学基金黄河水科学研究联合基金项目“黄河上游水资源演变对水光风储多能互补影响”(U2243232);中国电力建设股份有限公司“揭榜挂帅”核心技术攻关项目“流域梯级“水风光储”一体化关键技术”(DJ-HXGG-2022-01);水电水利规划设计总院科技项目“以抽水蓄能为主要调节、支撑电源远距离外送方式的安全稳定研究”(ZS-KJGH-20220009)。

摘　　要：水库泥沙淤积不仅会导致水库有效库容减小,影响水库的使用寿命和发电效益,还会影响水库的调节能力,增加水库的防洪压力。库区泥沙淤积预测有利于掌握水库运行期间的泥沙淤积趋势,便于制定合理的调度运行方式以达到防沙减沙的目的,延长电站使用寿命。采用一维恒定非均匀不平衡输沙数学模型预测了考虑上游梯级电站拦沙后,金沙江中游梨园、阿海水库在梨园—阿海混合式抽水蓄能电站建成后库区泥沙淤积趋势,结果表明:梨园、阿海水库泥沙主要淤积在库中—库尾河段,坝前泥沙淤积高程较低,库区泥沙淤积程度较轻;梨园-阿海混合式抽水蓄能电站运行100年后,梨园、阿海水库泥沙淤积总量分别约为1.21亿m3、1.94亿m3,调节库容淤损率分别为8.43%、14.4%。The sedimentation of reservoir will not only reduce the effective storage capacity of reservoir,affect the service life and power generation efficiency of reservoir,but also affect the regulation capacity of reservoir and increase the flood control pressure of reservoir.The prediction of sediment deposition in reservoir area is helpful to grasp the trend of sediment deposition during the operation of reservoir,to formulate reasonable operation mode to achieve the purpose of sediment control and reduction,and to extend the service life of hydropower station.A one-dimensional constant non-uniform and unbalanced sediment transport mathematical model is used to predict the sedimentation trend of Liyuan and Ahai reservoirs in the middle reaches of Jinsha River after the completion of Liyuan-Ahai hybrid pumped storage hydropower station considering the upstream cascade hydropower station.The results show that:The sediment of Liyuan and Ahai reservoirs is mainly deposited in the middle to the end of the reservoir,the sediment elevation in front of the dam is low,and the sediment deposition degree in the reservoir is light.After 100 years of operation of Liyuan-Ahai hybrid pumped storage hydropower station,the total amount of sediment deposition in Liyuan Reservoir and Ahai reservoir is about 121 million m3 and 194 million m3,and the loss rate of storage capacity was 8.43%and 14.4%,respectively.

关 键 词：泥沙淤积 梨园-阿海混合式抽水蓄能电站 预测 库容淤损率 

分 类 号：TV145[水利工程—水力学及河流动力学]