梯级水库建设对岷江下游航道通航流量的影响  

Influence of upstream hydro-junctions on navigable discharge of Minjiang channel

作　　者：李家世 刘晓帆 LI Jia-shi;LIU Xiao-fan(Sichuan Communications Surveying&Design Institute Co.,Ltd.,Chengdu 610017,China)

机构地区：[1]四川省交通勘察设计研究院有限公司,四川成都610017

出　　处：《水运工程》2021年第6期164-170,193,共8页Port & Waterway Engineering

摘　　要：为研究上游梯级对岷江下段航道通航流量的影响,特别是枯季来水的影响,以高场水文站作为依据站,以彭山、五通桥水文站作为参证站,采用统计分析方法,首先分析岷江各相关水文站特征流量及年际变化趋势,总体反映岷江年平均流量、1—3月平均流量及保证率95%的流量年际变化特征,再采用高场水文站3个流量系列定量分析紫坪铺梯级、瀑布沟梯级蓄水后对岷江(龙溪口—合江门)航道流量、水位的影响,最后提出本段航道整治设计最小通航流量建议。研究结果表明,岷江上游干流及其支流梯级运行对枯期流量有较大的补偿作用,岷江干流各水文站1—3月平均流量及保证率95%的流量均表现为增加趋势;高场水文站保证率95%流量在紫坪铺梯级蓄水后增加93 m^(3) s,在瀑布沟梯级蓄水后增加265 m^(3) s,在2个梯级影响下共增加358 m^(3) s,相应水位抬高0.43 m,瀑布沟梯级对岷江下段航道的通航流量影响更显著。To study the influence of the upstream hydro-junctions on the navigable discharge of the Minjiang channel,especially on the discharge in the dry season,taking Gaochang hydrological station as the base station,and Pengshan and Wutongqiao hydrological stations as reference stations,using the statistical analysis method,we analyze the characteristic flow and inter-annual variation trend of each hydrological station in the Minjiang River,which generally reflects the inter-annual variation characteristics of the average annual flow,the average flow from January to March and the guaranteed rate of 95%.After that,we analyze quantitatively the influence of the Zipingpu hydro-unction and Pubugou hydro-junction on the discharge and water level of the Minjiang channel using the three discharge series of the Gaochang hydrologic station.Finally,we put forward the suggestion of the minimum navigable discharge in the regulation design of this section.The results show that the operation of hydro-junctions in the upper reaches of the Minjiang River can increase the flow during the dry season.The average flow from January to March and the flow with the guaranteed rate of 95%of each hydrological station in the mainstream of the Minjiang River all show an increasing trend.The discharge of the Gaochang hydrological station with the guaranteed rate of 95%increases by 93 m^(3) s after Zipingpu cascade impoundment and increases by 265 m^(3) s after cascade impoundment.Under the influence of the two hydro-junctions,the discharge increases by 358 m^(3) s totally,and the water level with the guaranteed rate of 95%increases by 0.43 m.Pubugou hydro-junction has a more significant influence on the navigable discharge of the lower reaches of the Minjiang River.

关 键 词：岷江 紫坪铺梯级 瀑布沟梯级 通航流量 

分 类 号：U61[交通运输工程—船舶及航道工程] TV62[交通运输工程—船舶与海洋工程]