Although it may not seem like it, much of the available fresh water is found underground. It is located in bags or containers created in a natural way: the aquifers. Aquifer
The aquifer is a geological formation that stores water. This does not mean that it can be accessed directly. It is necessary to build wells, since in most cases the water is at great depth.
In territories that rain regularly and are leafy in nature, the permeability of the soil gradually causes the formation of these water deposits.
The water quality of an aquifer is very variable, it depends on the terrain and its internal structure.
In fact, there are several types of aquifers depending on their shape (porous or fissured). They can also be classified based on the atmospheric pressure they are subjected to (free or confined). Your geographic location is another element of classification (coastal or inland). In any case, the most important is the quality and quantity of groundwater deposited. Aquifer
It should be noted that potentially available fresh water comes from rivers and lakes, as well as aquifers and glaciers. In relation to volume, the amount of water in aquifers is greater than that existing in rivers and lakes, but less than in glaciers.
A normally unknown fact is the fact that the planet’s large aquifers are located on the African continent and one of them is located in a desert zone, in the Sahara
A relevância estratégica dos aquíferos é tão importante para a humanidade que não se descarta no futuro a possibilidade de haver conflitos ou guerras relacionadas à água, elemento imprescindível para a vida no planeta. Um bom exemplo do papel destas reservas de água é o Aquífero Guarani, localizado na zona central da América do Sul. Supera um milhão de quilômetros quadrados e com o volume de água depositado é possível que toda a humanidade se abasteça durante dois séculos. Aquifer
Quando afirmamos que o recurso da água é vital para a humanidade, devemos lembrar que dois terços são destinados à terra de cultivo, uma décima parte para o uso industrial e o restante como água potável para o consumo humano.