Gothenburg has a vision of becoming the best city in the world when it rains. And this vision makes perfect sense as Gothenburg is one of the rainiest cities in Sweden. Add to that a growing population, an ageing infrastructure and increasingly extreme weather patterns, and the city’s water utilities have their work cut out for them to protect both the city and the surrounding environment. With the solution ‘Future City Flow’ from DHI, launched in 2022, a digital twin of the utility now enables a harmonious flow of stormwater.

 

Heavy rainfall causes large loading variations to the Gothenburg region’s central treatment facility. Approximately 25% of the sewers in Gothenburg are combined, which increases the risk of floods as stormwater and wastewater are transported in the same system. It also increases the risk of untreated wastewater being discharged into the ecosystem.

 

By implementing DHI’s Future City Flow, a digital twin of the entire system, the wastewater utility Gryaab improved overview and got real-time information about events in the tunnels. Furthermore, the solution enabled accurate predictions of potential issues and peak pressure on the system, since the digital twin also incorporates weather forecasts in the modelling.