Intergovernmental Hydrological Programme

Also called the dependency ratio indicator. Methods of calculation:Dependency ratio = 100 percent*(IWR)/ ([IWR] + [IRWR]) (Equation 6) IWR = SW1IN + SW2IN + SWPR + SWPL + GWIN (Equation 7) Where: IWR = total volume of incoming water resources from neighbouring countries; IRWR = internal renewable water resources; SW1IN = volume of surface water entering the country which is not submitted to treaties; SW2IN= volume of surface water entering the country which is secured through treaties; SWPR = accounted flow of border rivers; SWPL = accounted part of shared lakes; GWIN = groundwater entering the country. For more information, visit: http://www.fao.org/nr/water/aquastat/maps/index.stm and http://www.fao.org/docrep/005/y4473e/y4473e07.htm