Havel
The Havel is a flow-regulated river that exhibits little to no floodplain dynamics. The weir in Brandenburg an der Havel ensures that target water levels are maintained.
Due to ice-age transformation of the landscape the Potsdam region shows a large number of waters. The spine of Potsdam’s water system consists of the river Havel with its so called Havel lakes and the river Nuthe as dominating waters. All in all 10 % of Potsdam’s urban area is taken by surfaces of the water.