岷江—横江洪水顶托对向家坝水电站通航影响研究  

Navigation impact of Minjiang and Hengjiang flood jacking on Xiangjiaba Hydropower Station

作　　者：潘增 毕明亮 陈忠贤 赵强 朱俊 夏德锋 PAN Zeng;BI Minliang;CHENG Zhongxian;ZHAO Qiang;ZHU Jun;XIA Defeng(River Basin Hub Administration,China Three Gorges Corporation,Yichang 443100,China;Three Gorges Material Tendering Management Co.,Ltd.,Chengdu 610000,China)

机构地区：[1]中国长江三峡集团有限公司流域枢纽运行管理中心,湖北宜昌443100 [2]三峡物资招标管理有限公司,四川成都610000

出　　处：《水运工程》2023年第12期137-144,共8页Port & Waterway Engineering

基　　金：中国长江三峡集团有限公司员工科研项目(NBYG202300610)。

摘　　要：通航为向家坝水电站功能之一。为发挥电站通航效益,明确电站适宜通航水流条件,前期通过实船试航试验初步确定电站最大通航流量不超8500 m^(3)/s,且最大泄洪流量不超2200 m^(3)/s双控标准。然而,在近年船舶通航实际调度中发现,向家坝水电站通航水流条件除受下泄流量影响以外,还受下游岷江、横江洪水顶托作用影响。通过建立向家坝—泸州一维非恒定流模型,模拟当汛期向家坝水电站依次按4000 m^(3)/s至8000 m^(3)/s各级流量恒定出库时,分别遭遇岷江、横江5~100 a一遇不同典型年洪水顶托后,向家坝水文站水位日变幅、小时变幅情况。得出当遭遇岷江50 a一遇、横江100 a一遇洪水顶托时,向家坝水文站最大水位小时变幅分别达0.55、1.19 m/h,最大水位日变幅分别达7.59、6.87 m/d;且仅当遭遇岷江、横江5~10 a一遇部分工况洪水顶托时,向家坝水文站水位满足小时变幅不超过1 m/h、日变幅不超过3 m/d双控要求,其余工况下水位变幅均超标准。研究成果可为后续向家坝水电站通航调度提供参考。Navigation is one of the functions of Xiangjiaba Hydropower Station.To give full play to the navigation benefits of the power station and clarify the suitable navigation flow conditions for the power station,the maximum navigation flow of the power station was preliminarily determined to be not more than 8500 m^(3)s and the maximum flood discharge is not more than 2200 m^(3)s dual-control standard through the full-scale ship trial navigation tests in the early stage.However,in recent years,it has been found that the navigation flow conditions of Xiangjiaba Hydropower Station are not only affected by the discharge flow,but also affected by the flood jacking effect of the downstream Minjiang and Hengjiang rivers.By establishing a one-dimensional unsteady flow model from Xiangjiaba to Luzhou,this paper simulates the daily and hourly variation of water level at Xiangjiaba Hydropower Station after encountering different typical annual frequency floods of Minjiang River and Hengjiang River with 5-100 years return periods during the flood season,when the flow rate of Xiangjiaba Hydropower Station is constant at various levels from 4000 m^(3)s to 8000 m^(3)s,respectively.It is calculated that when encountering the 50-year flood of Minjiang River and the 100-year flood of Hengjiang River,the hourly variation amplitude of the maximum water level at Xiangjiaba Hydrological Station is 0.55 m h and 1.19 m h respectively,and the daily variation amplitude of the maximum water level is 7.59 m d and 6.87 m d respectively.In addition,only when encountering the flood jacking of Minjiang River and Hengjiang River with a return period of 5-10 years,the water level of Xiangjiaba Hydrological Station meets the dual control requirements of no more than 1 m h and no more than 3 m d,and the water level variation under other conditions exceeds the standard.The research results can provide a reference for the navigation dispatching of Xiangjiaba Hydropower Station in the future.

关 键 词：向家坝通航 洪水顶托 水流条件 一维非恒定流模型 

分 类 号：U612[交通运输工程—船舶及航道工程]