Intergovernmental Hydrological Programme

The water supply seasonal variability is a normalized indicator of the variation in water supply between months of the year. Estimations are given for the year 2014. Seasonal variability is calculated as the standard deviation of monthly total blue water divided by the mean of total blue water calculated using the monthly mean. The indicator was created by the World Resources Institute (WRI) and ranges from 0-5, where 0 is lowest and 5 is highest. Values represent the "All-sector" indicator, and have been rounded to the nearest tenth by AQUASTAT.For more information, see WRI original analysis here: wri.org/publication/aqueduct-country-river-basin-rankings.Visit the FAO Aquastat website: http://www.fao.org/nr/water/aquastat/data/query/index.html?lang=en