Analysis of Effect of Jinjiang Reservoir on Downstream Annual Streamflow Distribution
Based on the daily flow at Renhua,Changba and Lishi stations covering 1958-2009,statistical analysis was done on the concentration degree,concentration period,nonuniform coefficient and extrema ratio with aim to understand the annual distribution of streamflow,and mainly analyzed the streamflow of Renhua and Changba before and after Jinjiang reservoir used.The results show that the concentration degree,the concentration period,the nonuniform coefficient and the extrema ratio of Lishi were on the rise when studied time was five days,which indicated that the annual streamflow distribution is becoming nununiform.The concentration degree and the nonuniform coefficient of Renhua and Changba were on the downward trend,which indicated that the annual streamflow distribution is becoming uniform.Studied time was one month,the extrema ratio of Lishi had a weak downward trend; and the rise trend of Renhua's extrema ratio was obvious.In general,the downstream annual streamflow distribution was more uniform after Jinjiang reservoir used; but the extrema ratio was increased than before.
Jinjiang reservoirannual streamflow distributionconcentration degreeconcentration periodnonuniform coefficientextrema ratio
国家科技期刊平台
NSTL
万方数据
维普
