It is relatively unknown that the volume of fresh water stored underground on our planet is 20 times greater than the overall volume of surface fresh water flowing in rivers and lakes. Groundwater is therefore potentially the main primary source of water supply on the planet. Indeed, nowadays around 40% of worldwide supply comes from groundwater, extracted from aquifers using wells (in some regions, such as the US, its relative weight amounts to over 50% of the supply).
Tag Archives: drought
When I began to write this blog one year ago, I did so talking precisely about the water crisis that São Paulo was experiencing and what, in my opinion, were the true causes of the situation. I am talking in the past because the crisis phase is already behind us, and what we are experiencing now is much worse. It is a situation of general emergency. To summarize, out of the four main systems which supply São Paulo there are two in which the water has gone below the catchment level, and the rest of the water, the so-called ‘dead volume’, is being pumped by means of floating pumps. The rainy season, which is about to end, has only managed to slow down the rate at which the levels are decreasing, but has not at all reversed the trend.