Project completed:

05/2011 – 04/2014



The intent of the project PROGREENcity was the provisioning of comprehensive greening for European cities. The largest (as yet) unused fallow areas are represented by the exteriors and rooftops of the building stock. Hence, for the duration of the project, existing innovative roof and vertical greening systems with ecological irrigation were developed for three different European climate zones, since PROGREENcity technologies aim to adapt urban areas to changes in climate and to reduce air pollutants.  In Europe, more than three quarters of people live in cities. Therefore densely built city centres and residential areas in ever expanding cities need to remain liveable into the future. The efficiency of the PROGREENcity technologies with regard to their micro-climatic effects (cooling, insulation, microclimate improvements) and their ability to absorb particulate matter were measured and simulated in 3 European cities, representing different climate zones: Vienna (Austria), Bottrop (Germany) and Madrid (Spain). The results formed the basis of a focused planning strategy for the effective processing of urban environmental problems under site-specific circumstances.

The Project was acknowledged a success by the German funding organisation ZIM: http://www.progreencity.com/pdf/zim-koop-071.pdf

Future Steps:

Green4Cities will use the knowledge gained within its consulting and training activities.





List of partners (6):
Hydrip GmbH (Irrigation Company), Austria www.hydrip.at

Optigrün International AG (green roofs, living walls), Germany www.optigruen.de

Techmetall Erzeugungs- Handel- u. Montage Ges.mbH (living walls), Austria www.gruenwand.at

Bergische Universität Wuppertal, Germany, Department of Safety Engineering www.uws.uni-wuppertal.de

Johannes Gutenberg Universität Mainz, Environmental Monitoring Group (EMG), Germanywww.emg.uni-mainz.de

Universität für Bodenkultur Wien, Institute of Soil-Bionengineering (IBLB), Austriawww.baunat.boku/iblb.html


Figures and Results:




Figure 1: Model area Mariahilferstraße, Vienna: on the top is the status quo scenario, above the greened scenario. The comparison of the two scenarios at the same date and time at the same height for the PET (physiological equivalent temperature) is demonstrated in Figure 2.
The cooling effect of the vegetation on the PET is evident across the whole simulation area and is at the high level of 6-7 K. The narrow east-west oriented streets especially show a strong decrease in the PET of more than 10K.




Figure 2: Total difference of PET (felt temperature) between the status quo and the greened scenario.


Simulation of the effects of vertical greening on the exterior – comparision with an extreme scenario:

To demonstrate an extreme scenario of the effects of vegetation on green facades, the east side of Mariahilferstraße in Vienna was simulated. The first scenario shows the model area in its actual location. The second scenario shows the same location with the potential maximum number of buildings greened.