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Table 5

Changes of annual streamflow by the change points (by the sequential MK test) of the six stations with the statistically decreasing trend at significance level 0.05

StationPeriodYearQOa (m3/s)Qna (m3/s)
Zhuangqiao Natural period 1956–1987 15.70 7.55 
Impacted period 1988–2000 5.15 5.43 
Change  10.55 2.12 
Xuanwu Natural period 1959–1986 7.53 7.50 
Impacted period 1987–2000 1.69 6.37 
Change  5.84 1.12 
Mengcheng Natural period 1956–1980 54.97 47.72 
Impacted period 1981–2000 18.23 34.03 
Change  36.74 13.69 
Yongcheng Natural period 1956–1980 5.26 5.36 
Impacted period 1981–2000 1.13 4.32 
Change  4.13 1.04 
Linyi Natural period 1958–1966 115.38 123.90 
Impacted period 1967–200 46.23 76.26 
Change  69.15 47.64 
Daguanzhuang Natural period 1958–1966 46.79 49.21 
Impacted period 1967–2000 25.99 36.03 
Change  20.80 13.19 
StationPeriodYearQOa (m3/s)Qna (m3/s)
Zhuangqiao Natural period 1956–1987 15.70 7.55 
Impacted period 1988–2000 5.15 5.43 
Change  10.55 2.12 
Xuanwu Natural period 1959–1986 7.53 7.50 
Impacted period 1987–2000 1.69 6.37 
Change  5.84 1.12 
Mengcheng Natural period 1956–1980 54.97 47.72 
Impacted period 1981–2000 18.23 34.03 
Change  36.74 13.69 
Yongcheng Natural period 1956–1980 5.26 5.36 
Impacted period 1981–2000 1.13 4.32 
Change  4.13 1.04 
Linyi Natural period 1958–1966 115.38 123.90 
Impacted period 1967–200 46.23 76.26 
Change  69.15 47.64 
Daguanzhuang Natural period 1958–1966 46.79 49.21 
Impacted period 1967–2000 25.99 36.03 
Change  20.80 13.19 
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