Analysis of Runoff Variation Characteristics and Influencing Factors in the Wujiang River Basin in the Past 30 Years.

Int J Environ Res Public Health · 2021 · PMC8750757 · PMID 35010631

Europe PMC DOI

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a decreasing trendno p-value reported

Its test statistic Z is: (3) Z c = S − 1 var ( S ) , S > 0 0 , S = 0 S + 1 var ( S ) , S < 0 (4) var ( S ) = [ n ( n − 1 ) ( 2 n + 5 ) − ∑ t t ( t − 1 ) ( 2 t + 5 ) ] / 18 In this trend test, Z > 0 represents an increasing trend, whereas Z < 0 represents a decreasing trend.

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