三峡工程蓄水后宜昌站水流特性变化及测验措施  

Variation and Test Measures of Flow Characteristics at Yichang Station after Impoundment of Three Gorges Project

作　　者：伍勇 柳鑫[2] 龙飞 任伟 WU Yong LIU Xin LONG Fei REN Wei(Three Gorges Bureau of Hydrological and Water Resources Survey, Changjiang Water Resources Commission,Yichang 443000, China College of Hydraulic ＆ Environmental Engineering,China Three Gorges University, Yichang 443002, China)

机构地区：[1]长江水利委员会长江三峡水文水资源勘测局,湖北宜昌443000 [2]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《长江科学院院报》2017年第5期22-26,共5页Journal of Changjiang River Scientific Research Institute

摘　　要：为了探究三峡工程蓄水后水文站水流特性,以宜昌站为例,利用蓄水后多年实测资料,分析宜昌站水位特性和洪水特性。结果表明:水位波动性增强,同流量级下水位降低,历年最高水位下降、最低水位抬高,中低水位持续时间增长;中低水位流量呈现日周期变化,年最小流量有增大趋势,并逐渐稳定在6 000 m^3/s左右,年最大流量因三峡水库调蓄得到控制,峰顶持续时间变长,年内水量变化为枯期增加、汛期减少,中低水位-流量关系呈多条单一线变化趋势。因此,根据现有水流特性变化,需调整水位和流量资料收集方式,以满足整编需要。In order to explore the flow characteristics of hydrological stations after reservoir impoundment of Three Gorges project, we took Yichang station as an example and analyzed the characteristics of water level and flood ac-cording to measured data from 2003 to 2014.Results showed that water level fluctuation intensified and water level decreased under the same discharge, the highest annual water level declined and the lowest water level raised. The duration of mid-low water level increased and its discharge varied in daily scale; Moreover, annual minimum dis-charge tended to increase and gradually kept stable at 6 000 m^/s. Since annual maximum discharge was under the control of regulation and impoundment of Three Gorges reservoir, the duration of flood peak lasted longer and annu-al discharge varied with longer low flow period and shorter flood period. Relationship between mid-low water level and discharge showed a tendency of many single lines. Therefore, according to current characteristics of water flow, we should adjust the methods of collecting water level and discharge data to meet the need of compilation.

关 键 词：三峡工程 蓄水 宜昌站 水流特性 测验措施 

分 类 号：P332[天文地球—水文科学] P333[水利工程—水文学及水资源]