"...Isn't it possible to do it this way: dig a ditch, put the same bushes and tree branches at the bottom - water will easily drain away from your site through the branches and bushes - and on top of the branches and bushes, put hummocks cut from the place where the drainage ditch is laid; such hummocks are laid with the grass down, so that the earth does not crumble and does not clog the passage left for water between the branches; well, and then, the excavated earth is returned to the hummocks. It can serve for 5, or even 7-8 years. If, instead of hummocks, you use building materials (film, slate, roofing felt), such a closed drainage system will not require special attention and more than 10 years..." T.I. Sergeeva "Your Garden"