考虑下游水位小时变幅限制的向家坝电站下泄流量变化分析  

Analysis of the Discharge Flow Variation in Xiangjiaba Hydropower Station considering the Hourly Variation Limits of Downstream Water Level

作　　者：张士君 王渺林 ZHANG Shijun;WANG Miaolin(Upper Changjiang River Bureau of Hydrological and Water Resources Survey,Bureau of Hydrology of Changjiang Water Resources Commission,Chongqing 400021,China)

机构地区：[1]长江水利委员会水文局长江上游水文水资源勘测局,重庆400021

出　　处：《水电与新能源》2025年第2期20-23,共4页Hydropower and New Energy

基　　金：长江水利委员会水文局科技创新基金项目(SWJ-CJX23Z10);长江水科学研究联合基金(U2240201)。

摘　　要：水电站下泄流量变化可能对下游航运产生影响。本文针对航运部门提出的向家坝电站下游水位小时变幅要求,采用河道一维水流数学模型,并考虑下游入汇支流横江、岷江、南广河、沱江等来水影响,拟定计算条件,分析洪水期不同流量级条件下受下游水位变幅限制的向家坝水电站下泄流量变化。研究结果表明,考虑下游水位小时变幅的限制后,向家坝水电站下泄流量的变化量减少190~400 m^(3)/s。当下游支流流量同时上涨时,下泄流量的变化量也会进一步减少为800~1000 m^(3)/s。Variation of the discharge flow of hydropower stations may affect the downstream shipping.Considering the requirements of the shipping department on the hourly variation limits of the downstream water level of the Xiangjiaba Hydropower Station,and the influence of the incoming water from downstream tributaries such as Hengjiang River,Minjiang River,Nanguang River,and Tuojiang River,the discharge flow variation of the station under different flow levels during the flood period limited by the downstream water level variation is analyzed with a one-dimensional mathematical model of the river flow.The results show that the variation of the discharge flow of Xiangjiaba Hydropower Station is reduced by 190~400 m^(3)/s when considering the hourly variation limits of downstream water level.When the flows of downstream tributaries increase simultaneously,the discharge flow variation will further decrease to 800~1000 m^(3)/s.

关 键 词：电站调度 水位变幅 下泄流量 向家坝水电站 

分 类 号：TV697[水利工程—水利水电工程]