The slope estimated by a regression model indicates the mean temporal change of VCI in which a positive slope indicates an increasing trend and a negative slope denotes a decreasing trend.
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Spatial and Temporal Variation of Drought Based on Satellite Derived Vegetation Condition Index in Nepal from 1982⁻2015.
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The sentences
The slope of the annual and seasonal VCI trend is computed as an average change: a negative value indicates a negative trend and a positive value indicates a positive trend. 3.4.