The HAMBURG WATER Cycle® in the Jenfelder Au

Innovative character of the HAMBURG WATER Cycle®

The HAMBURG WATER Cycle® will be carried out for the first time in a larger scale in the Jenfelder Au. There, the HWC will be implemented in approximately 630 residential units, making the development of a neighborhood with climate-neutral residences with sustainable water drainage possible.

The project is unique in its size and value as an example to spur future innovation in urban development and planning. For these reasons, the Jenfelder Au is a pilot project of the “National Urban Development Policy” of the Federal Ministry of Building and Urban Development (BMVBS) and the Federal Institute of Building, Urban Affairs and Spatial Development (BBSR).


Using stormwater twice

The HAMBURG WATER Cycle® can vary on its scale of implementation. The most crucial feature is the separation of wastewater streams and the subsequent energy recovery from the wastewater. In the neighbourhood of Jenfelder Au, a feature is added, rainwater, which extends the creative possibilities of urban- and landscape-planners. In the open space design, rainwater becomes a creative element.

The Jenfelder Au stormwater management concept decouples the rainwater flow from the sewer network, allowing the water to flow over the natural landscape back to the local waters. The landscape and urban planning concept is made possible through the use of open channels which allow rain to flow through streams and waterfalls to retention basins which are in the form of attractive ponds and lakes. Thus, the appearance of the residential area is enhanced, and the flood protection is optimized as the retention basins are designed to provide further storage potential in case of heavy downpours.

Separation of grey- and blackwater

How the HAMBURG WATER Cycle will be implemented in the Jenfelder Au with its separation of grey- and blackwater streams and where retention basins for rainwater will be realized, is shown in the following overview plan: