project is located in the center of Berlin and transforms an unused arm of the River Spree into a natural 745m “swimming pool”. The facility is the equivalent of seventeen Olympic swimming pools with an average width of 28.8m, water depth around 2.2m, and features a 780m-long reed bed filtration system. The renewal concept for the 3.9ha site is as invigorating and hypothetical as it is realistic and simple in design. Parts of the Lustgarten quay wall are converted into generous stairs providing access to the swimming pool, with functional lockers and change rooms integrated unobtrusively into the terrain.
Water entering the upper section of the river arm is purified through a 1.8ha reed bed natural reserve with sub-surface sand bed filters. A barrage at the lower end of the system prevents the backflow of unfiltered water from the main body of the river, and overflow outlets for city’s mixed sewage network are channeled beneath the system. Since the fall of the Berlin Wall in 1989, the precinct has experienced a 75% increase in resident population and parallel loss of vacant space. The Flussbad right in the heart of Berlin’s historic city center on an unused river arm provides a public urban recreation space for both, residents and tourists adjacent to the UNESCO World Heritage site, Museuminsel (Museum Island).