Assessing the impact of climate change and human activity on streamflow in a semiarid basin using precipitation and baseflow analysis.

Additionally, at the seasonal scale in these sub-basins, the average precipitation in winter showed a significant downward trend, while runoff showed a decreasing trend and the BFI index showed increasing trends in winter, spring and summer.

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The critical values of statistical test Z ∝ /2 = ± 1.28, ± 1.96, and ± 2.58; *+** and *** denote the existence of a significant trend at confidence levels of 90%, 95%, and 99%, respectively.

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