摘要
向家坝水库为金沙江水电开发利用的最后一级,因受到下游横江、岷江来水顶托影响,水库下游断面的水位流量关系变得复杂,增加了水库下游向家坝水文站水位计算和航道养护尺度确定的难度。选取2018~2022年向家坝水文站、横江站及岷江站的实测水文资料,确定横江、岷江对向家坝水文站造成顶托影响的临界流量,并建立向家坝站流量、横江及岷江流量与顶托量的三参数相关关系。结果表明:横江、岷江单独涨水的顶托临界流量分别为400m^(3)/s、6000m^(3)/s,且随着横江、岷江来水增大,其顶托影响也逐渐增大;横江、岷江每增加100、1000m^(3)/s对向家坝站的平均顶托量分别约为0.2m、0.17m,两江联合涨水的最大顶托量为7.1m。
The Xiangjiaba Reservoir represents the final stage in the hydropower development of the Jinsha River.Owing to the jacking influences from the downstream inflows of Hengjiang and Minjiang rivers,the relationship between water level and flow rate at the reservoir's downstream profile has become intricate.This complication elevates the challenges associated with calculating water levels at the Xiangjiaba hydrological station and ascertaining the maintenance scale for navigation channels.Utilizing hydrological data collected from 2018 to 2022 at the Xiangjiaba,Hengjiang,and Minjiang stations,this research aimed to ascertain the critical flow thresholds that induce jacking influence on the Xiangjiaba hydrological station due to Hengjiang and Minjiang.Additionally,a tri-parametric correlation was devised that links the flow volumes at Xiangjiaba station,Hengjiang,and Minjiang with the corresponding jacking quantities.Findings reveal that the isolated rising waters of Hengjiang and Minjiang reach critical jacking flow rates of 400 m^(3)/s and 6000 m^(3)/s,respectively.As the inflows from Hengjiang and Minjiang intensify,their respective topping impacts also escalate.Specifically,increments of 100 m^(3)/s and 1000 m^(3)/s from Hengjiang and Minjiang result in average topping magnitudes of roughly 0.2 m and 0.17 m at the Xiangjiaba station.When both rivers experience simultaneous rises,the peak jacking magnitude recorded is 7.1 m.
作者
陈柯兵
熊雄
万平
单敏尔
雷雪婷
Chen Ke-bing;Xiong Xiong;Wan Ping;Shan Min-er;Lei Xue-ting(Hydrology Bureau of Changjiang Water Resources of Commission of Water Resources,Wuhan 430010,Hubei,China;Changjiang Waterway Institute of Planning and Design,Wuhan 430040,Hubei,China;Changjiang Waterway Bureau,Wuhan 430010,Hubei,China)
出处
《中国水运》
2024年第10期106-109,共4页
基金
长江航道局科技项目(202230001)
中国长江三峡集团有限公司资助项目(0711606)。
关键词
水位流量关系
顶托影响
岷江
横江
向家坝站
航道养护尺度
water level and flow relationship
jacking influence
Minjiang river
Hengjiang river
Xiangjiaba station
waterway maintenance dimension
