With a film

On the bottom, it is necessary to lay a layer of peat, sand or a special soil seal (this layer is 5-7 cm). Everything needs to be thoroughly tamped and lay out a lining made of geotextiles on top. After that, the pit is covered with a film, which evenly straightens from the center to the edges and a thin stream is poured from the hose, under the weight of which the film slowly settles, and possible folds are aligned.