Very often, in areas of the world where there is great difficulty in obtaining water for homes or plantations, wells are built, which are almost always of the artesian type. An artesian well is a type of naturally effluent well: groundwater reaches the surface without the need for mechanical aids, making it possible to supply water without the pumping systems required for other types of wells. The dimensions of artesian wells are around 20-30 cm in diameter and reach very high depths, even more than 100 m. They therefore pose a significant danger when, once unused, they are not properly sealed at the surface, causing numerous accidents, especially in India, where children are often the victims.