Crisis proofing South Africa's water security

South Africa is often referred to as the 30th driest country in the world, a claim that's based on its average annual rainfall of 500mm compared to the world average of 860mm. National rainfall averages have a purpose. They do, however, have limited value where regional and local rainfall distribution varies considerably and when water security is threatened by recurring droughts, or when water use is poorly regulated and managed. Average rainfall data is meaningless when water demand exceeds supply.
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