Is Africa really short of water? -- The Potential of Groundwater
Groundwater is an integrated component of the natural water cycle and can be found almost anywhere beneath our feet. This hidden source of water is important for drinking, livestock, and irrigation in Africa. Sustainable freshwater sources are critical in fulfilling the sustainable development goals (SDGs), particularly SDG 6 on water. According to the first quantitative map of groundwater resources in Africa produced by MacDonald et al. (2012) , the volume of groundwater is estimated to be 0.66 million km 3 . To view this number in a more realistic manner, this is 100 times more than annual renewable freshwater resources and 20 times more than the freshwater present in African lakes. However, this gigantic pool of ‘hope’ to Africa has been widely ignored and misunderstood. Falkenmark’s study (1989) on the Water Stress Index only sees a definite measure of water scarcity that is based on the “hydraulic density of population”. This water metric disregards freshwater storage such a...