Underground dams

It is a subsoil water storage technology that consists of the generation of small, artisanally confined aquifers (volume of underground land saturated with water). These fulfill the function of blocking underground runoff by forming an impermeable barrier transversely to the flow of water. In the construction process, an area with small ravines is first located. In one or more of them, a transverse trench with a width of approximately 0.50 m is excavated. A polyethylene blanket or any waterproof blanket is placed vertically on the wall of said trench, and it is left to protrude towards the surface about 1 m to cover an edge with a height of approximately 0.60 m. Immediately, the trench is covered with the same earth that has been extracted. Said ditch and the polyethylene, located upstream, create an underground barrier or impermeable curtain that prevents infiltrated water from being lost downstream through deep percolation. Thus, a confined aquifer is created whose water can be extracted.