Amsterdam is experiencing the effects of climate change, in terms of flash floods due to heavy rainfall, higher temperatures, and increased droughts.
The RESILIO project proposes an innovative adaptation plan to climate change by laying blue-green roofs (where blue stands for water, green for plants) on 10,000 square meters of buildings (out of which 8,000 square meters are in social housing buildings) in four districts of the city where there are higher risks of flooding caused by heavy rain.
Blue-green roofs can absorb much more water than ordinary green roofs. As a result, they support the evaporation process during hot, dry weather, a fact that cools the homes and potentially – depending on the area covered - the entire neighborhood. As a result, blue-green roofs mitigate the urban heat island and consequently reduce energy consumption for cooling at the building level.
The new roofs incorporate a smart system of sensors with the capacity to retain or release water in response to the weather forecast. Roofs will be part of an interconnected network. In addition, a wider variety of plants can grow on blue-green roofs, which is beneficial for urban biodiversity.
The project is based on a partnership between the municipality of Amsterdam, the water company Waternet, Universities, green roof companies, and housing corporations.
RESILIO builds upon 5 years of R&D of smart blue-green roof technology as developed by several of the project partners. After the proven success of single blue-green roofs across Amsterdam, RESILIO moves to build a smart grid of roofs, also enabling real-time data exchange for dynamic water levels.
In its general perspective, the project capitalizes on the successful green roofs state/city program, supports the emerging green sector of Nature-Based Solutions (NBS), and develops a new market-linked to adaptive urban water management of new type and scale. The project also results in the mitigation of heat, thus improving thermal comfort both indoor and outdoor.
The output of the project so far is a network of 10,000 square meters of blue-green roofs. Finally, the project has resulted in a new municipal approach for urban space interventions and has demonstrated the merit and importance of innovation for climate change adaptation.
 Amsterdam University of Applied Sciences, Vrije Universiteit Amsterdam, housing corporations Stadgenoot, Ymere and De Key, and roof maintenance company Consolidated.