The World Water Day, was introduced by the United Nations in 1992 to remind people of water as an essential resource for life. For this year's theme "Groundwater – making the invisible visible", Ecologic Institute co-organized a webinar to present an augmented reality app that was developed as part of the project Digital Water City (DWC).

The app "Making groundwater visible" allows for a playful insight into Berlin's groundwater flows on your own smartphone or tablet. The app was developed jointly by Berliner Water Works (BWB), the Kompetenzzentrum Wasser Berlin (KWB) and Vragments. Ecologic Institute provided scientific support during the development of the app.

First, Dr. Christoph Sprenger (KWB) provided background knowledge about the app, the data basis and its goals. Afterwards, Stephan Gensch of Vragments who lead the technical development of the app illustrated the use of the app. This was followed by an interactive part in which participants could give feedback on the app. Finally, other applications developed within the Digital Water City project were presented, such as a serious game on the Water-Energy-Food Nexus. The webinar was moderated by Alexander Sperlich (BWB) and Dr. Ulf Stein (Ecologic Institute).

The "Making groundwater visible" app will be available for download soon.