Why are ground water tables so important?
We have already seen that a little more than a tenth of a drop of fresh water (out of 100) is availabe for direct consumption by man, which is very little. Pay attention, because this phrase will explain the issues at stake in this case file: 95% of this rare resource is stored in ground water tables. In other words, the future of man depends on the water contained in these natural reservoirs because they provide a half to a quarter of our water for consumption, depending on the countries. But the ever increasing encroachment of the human species, as well as pollution, are a serious threat to the environment. To understand this, let’s imagine that we are out in the wild, man has not yet ravaged the earth and it is raining. After being soaked up by the vegetation and drunk by the animals, the remaining water slowly inflitrates the soil, penetrating the mineral beds as it gradually flows through the different geological strata. In one phase, it encounters a waterproof bed, such as clay,
