Drainage, retention and supply system for regulating the water regime in the country uses existing systematic drainage. In the locations of removed mines and adjacent parts of the pipeline there will created pools connected by open meandering channel. Parts of a broken pipe channel and / or conducting main drains to drain the original systematic lead as water inlets to the pools. The system also has a drainage and retention function, it is used to feed livestock and wild animals, positively affects biodiversity, landscape and the building is cheaper than conventional revitalization.