南水北调与水利科技
南水北調與水利科技
남수북조여수리과기
South-to-North Water Transfers and Water Science & Technology
2015年
5期
823-826,836
,共5页
陈帅%鲁程鹏%李姝蕾%王冠%李俊江
陳帥%魯程鵬%李姝蕾%王冠%李俊江
진수%로정붕%리주뢰%왕관%리준강
基流分割%递归数字滤波法%长江干流%空间变化%年代变化
基流分割%遞歸數字濾波法%長江榦流%空間變化%年代變化
기류분할%체귀수자려파법%장강간류%공간변화%년대변화
baseflow separation%recursive digital filters method%mainstream of Yangtze River%spatial variation%temporal variation
基流是河川径流中相对稳定的径流组成部分，基流分割在水资源、水环境和水安全的管理研究中都有着重要的应用。为了探究沿长江干流的基流变化特征，使用递归数字滤波法对长江干流7个水文站进行基流分割研究。结果表明，各站基流指数在0.768~0.798之间。对朱沱站-大通站区间基流量贡献最大的区间是宜昌站-螺山站，其次是朱沱站-寸滩站，最小的是万县站-宜昌站。2000年前后，长江干流基流量出现明显的衰减变化。基流量衰减最大的是宜昌站(衰减率为8.82%)，其次为万县站(衰减率为8.79%)。
基流是河川徑流中相對穩定的徑流組成部分，基流分割在水資源、水環境和水安全的管理研究中都有著重要的應用。為瞭探究沿長江榦流的基流變化特徵，使用遞歸數字濾波法對長江榦流7箇水文站進行基流分割研究。結果錶明，各站基流指數在0.768~0.798之間。對硃沱站-大通站區間基流量貢獻最大的區間是宜昌站-螺山站，其次是硃沱站-吋灘站，最小的是萬縣站-宜昌站。2000年前後，長江榦流基流量齣現明顯的衰減變化。基流量衰減最大的是宜昌站(衰減率為8.82%)，其次為萬縣站(衰減率為8.79%)。
기류시하천경류중상대은정적경류조성부분，기류분할재수자원、수배경화수안전적관리연구중도유착중요적응용。위료탐구연장강간류적기류변화특정，사용체귀수자려파법대장강간류7개수문참진행기류분할연구。결과표명，각참기류지수재0.768~0.798지간。대주타참-대통참구간기류량공헌최대적구간시의창참-라산참，기차시주타참-촌탄참，최소적시만현참-의창참。2000년전후，장강간류기류량출현명현적쇠감변화。기류량쇠감최대적시의창참(쇠감솔위8.82%)，기차위만현참(쇠감솔위8.79%)。
Baseflow is a relatively stable component of streamflow,and baseflow separation is widely used in the management and research of water resources,water environment,and water security.In order to investigate the variation of baseflow along the Yangtze River,recursive digital filters method was employed to calculate the baseflow at seven hydrological stations in the main-stream of the Yangtze River.The research results showed that the BFI (baseflow index)is between 0.768 and 0.798 at each station.The river reach between Yichang and Luoshan stations has the greatest contribution to the baseflow between Zhutuo and Datong stations,followed by the river reach between Zhutuo and Cuntan stations,and the smallest is the river reach between Yichang and Wanxian stations.Around the year of 2000,the baseflow in the mainstream of the Yangtze River decreased signifi-cantly.Baseflow at Yichang station had the highest reduction rate of 8.82%,followed by Wanxian station with a reduction rate of 8.79%.
