白鹤滩蓄水期向家坝控泄对下游航道影响分析  

Influence of Xiangjiaba discharge control on downstream channel during impoundment period of Baihetan

作　　者：毕明亮 潘增 邢龙 唐玉川 陈忠贤 孙志峰 BI Ming-liang;PAN Zeng;XING Long;TANG Yu-chuan;CHEN Zhong-xian;SUN Zhi-feng(China Three Gorges Corporation,Wuhan 430010,China)

机构地区：[1]中国长江三峡集团有限公司,湖北武汉430010

出　　处：《水运工程》2022年第4期81-87,共7页Port & Waterway Engineering

基　　金：中国长江三峡集团有限公司员工科研项目(WWKY-2021-0223)。

摘　　要：基于最新河道断面资料,建立向家坝—泸州的一维非恒定流模型,定量分析白鹤滩水库蓄水期间,在保证正常通航情况下向家坝水电站的最小通航流量和对应日调节出库流量方案。按横江70 m^(3)/s、岷江700 m^(3)/s恒定侧向入流,向家坝水电站按不同量级出库情况模拟,计算沿程各断面水位,求出向家坝下游最低通航水位265.8 m对应流量约为1520 m^(3)/s。根据电站日调峰运行规律,通过白天加大下泄流量按1700 m^(3)/s恒定出库,夜间减少至1520 m^(3)/s,得出最大水位变幅为0.31 m,对下游船舶影响较小,按1700 m^(3)/s下泄时可较1520 m^(3)/s时扩宽对应2.5 m水深宽度约20 m,该方式能适当缓解翻坝转运船舶的减载压力。With the latest river section data,we build a one-dimensional unsteady flow model of the Xiangjiaba-Luzhou reach,and analyze quantitatively the scheme of the minimum navigable flow and corresponding daily-regulated outflow for the Xiangjiaba Hydropower Station under ensured normal navigation during the impoundment period of the Baihetan Reservoir.Specifically,with assumed steady lateral inflow from Hengjiang River(70 m^(3)/s)and Minjiang River(700 m^(3)/s),we simulate the outflow from the Xiangjiaba Hydropower Station at different orders of magnitude and calculate the water level at each section along the way.The lowest navigable water level in the downstream below Xiangjiaba obtained is 265.8 m,and the corresponding flow is about 1520 m^(3)/s.Then,according to the daily peak shaving operation law of the station,the discharge flow is increased to a steady outflow of 1700 m^(3)/s during the day and reduced to 1520 m^(3)/s at night.As a result,the maximum water level variation is 0.31 m,which has little impact on the downstream ships.When the discharge flow is 1700 m^(3)/s,the width of 2.5 m water depth can be widened by about 20 m on that under the discharge flow of 1520 m^(3)/s.This method can alleviate the load reduction pressure on cross-dam transportation ships.

关 键 词：白鹤滩水库蓄水 一维非恒定流 下泄流量 出库调度 

分 类 号：U612[交通运输工程—船舶及航道工程]