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Coefficient of variation (in percent) of modeled monthly discharge for the period 1993-2002 for major rivers.

Map description and dataset provided by: Complex Systems Research Center (CSRC)

DescriptionCoefficient of Variation of Monthly Discharge

This map shows the coefficient of variation (CV) of monthly modeled discharge for the period 1993-2002 in percent and illustrates seasonal variations in discharge for major rivers.


The Coefficient of Variation (CV) is a statistical measure of the potential seasonal and inter annual fluctuations in river discharge. High variability of discharge is observed in regions where the annual discharge regime is dominated by snow-melt, such as the high latitude regions in river basins draining into the Arctic Ocean, and in regions with a pronounced seasonal rainfall regime.


The dataset for this map was provided by: Dominik Wisser, Complex Systems Research Center (CSRC)


This dataset is based on a reconstruction of terrestrial discharge for the last century using a macro-scale hydrological model forced with observed global climate data.


Please cite this map as: "GWSP Digital Water Atlas (2008). Map 76: Coefficient of Variation of Monthly Discharge (V1.0). Available online at http://atlas.gwsp.org."

Contact Information

Dominik Wisser ( This e-mail address is being protected from spam bots, you need JavaScript enabled to view it )

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