摘要
随着三峡水库运用条件和调度方式的变化,库区水面线的沿程特性发生了一定程度的变化。为了探求水面线的时空变化规律,选取三峡水库典型洪水调度过程及典型瞬时水面线进行各库段水面线特性研究。结果表明:坝前至巴东段不受寸滩流量影响。巴东至白沙沱段受坝前水位与寸滩流量双重影响,寸滩流量40000 m^(3)/s以下时,此段水面线主要受坝前水位的影响;寸滩流量30000 m^(3)/s以下且坝前水位达到165 m时,此段水面线基本不受寸滩流量的影响。白沙沱至寸滩段受寸滩流量与坝前水位综合影响,坝前水位150 m以下、寸滩流量50000 m^(3)/s以下时,此段水面线与寸滩流量相关。坝前水位达到165 m后,回水影响至寸滩河段。
With the change of operation condition and mode of Three Gorges Reservoir,the water surface profile has changed along the reservoir area.In order to study the temporal and spatial variation law of water surface profile,the typical flood operation process and typical instantaneous water surface profile of Three Gorges reservoir were selected to study the variation characteristics of water surface profile of various reservoir sections.The results showed that the water surface profile from the dam to Badong reach was not affected by the flow of Cuntan station;the water surface profile of the reach from Badong to Baishatuo was affected by the water level in front of the dam and Cuntan discharge,when the Cuntan discharge was less than 40000 m^(3)/s,the water surface profile in this reach was mainly affected by the water level in front of the dam;when the Cuntan discharge was less than 30000 m^(3)/s and the water level in front of the dam reaches 165 m,the water level in this reach was not affected by the Cuntan flow;the water surface profile from Baishatuo to Cuntan reach was affected by the inflow of Cuntan station and the water level in front of the dam,when the water level in front of the dam was below 150 m and Cuntan discharge was below than 50000 m^(3)/s,the water surface profile was related to Cuntan flow,when the water level in front of the dam is higher than 165 m,the backwater effect of the water level in front of the dam significantly affect Cuntan reach.
作者
袁玉
鲁军
胡挺
肖扬帆
李肖男
YUAN Yu;LU Jun;HU Ting;XIAO Yangfan;LI Xiaonan(Hubei Key Laboratory of Basin Water Security,Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China;China Three Gorges Corporation,Yichang 443133,China)
出处
《水利水电快报》
2022年第7期89-94,共6页
Express Water Resources & Hydropower Information
关键词
水库运行
典型洪水调度
水面线
坝前水位
寸滩流量
三峡水库
operation of reservoir
typical flood regulation
water surface profile
water level in front of dam
Cuntan flow
Three Gorges reservoir
