Streams catchments in the territory of the Lodz City (294km2) – the Sokolowka (northern part of the city) and Ner rivers (southern part of the city) serve as demonstration areas for implementation of ecohydrology in systemic urban water management (elaborated by: M. Grzelak based on the resources of the Marshal`s Office of the Lodz Voivodship) (See also colour plate 15)