Transformations of Hydrographic Shape of the Warta River within the Limits of Poznań City and Poznań Metropolitan Area

Abstract

Changes to the Warta river on its Poznań section, in the historical approach, has been presented in the work. Economical circumstances supporting the change of this hydrographical set were shown and the spatial consequences of the introduced changes have been pointed out. The abandoned concept from the 19th century and the limits of works of the carried out rebuilding in the 1960s were discussed in detail. The inaccuracy of the chosen concept was stressed and the need for renaturalization of the river beds was raised, together with examples given of such actions on the area of Poland and Europe