Combined multivariate statistical techniques, Water Pollution Index (WPI) and Daniel Trend Test methods to evaluate temporal and spatial variations and trends of water quality at Shanchong River in the Northwest Basin of Lake Fuxian, China.

PLoS One · 2015 · PMC4383595 · PMID 25837673

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a clear trendno p-value reported

Indeed, it is not easy to note a clear trend of either increase or decrease in the values of WPI, especially at March and April.

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