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The technology for waterfront management in the form of a vertical bioretention system using prefabricated modules to provide increased flood safety, improve water ret...

Modular vertical waterfront bioretention system

The technology for waterfront management in the form of a vertical bioretention system using prefabricated modules to provide increased flood safety, improve water retention, renaturalization of waterfronts in urban areas, enhance climate resilience and achieve environmental and social objectives.

Modular vertical waterfront bioretention system that retains and purifies rainwater, protects against floods and erosion, boosts biodiversity, cools cities, and revitalizes riverfront areas.

Water conservation and efficient rainwater management, improving quality and reducing pollution.
Increased biodiversity and preservation of native species in cities
Lower temperatures and improved microclimate, enhancing residents’ comfort.

Our innovation addresses urban stormwater challenges such as floods, riverbank erosion, declining water quality, biodiversity loss, and the urban heat island effect. These hazards cause infrastructure damage, ecosystem degradation, rising maintenance costs, and reduced quality of life for residents.

TRL2. Applied research: Technology concept and/or application formulated
The Technology Readiness Level (TRL) of our innovation is TRL 2 – the technology concept has been formulated and potential applications identified. Analyses have been conducted, and a conceptual design for a real location (riverfront in Wrocław) has been developed, meeting formal requirements. Further research, testing, and prototyping are now needed to validate the assumptions and gather empirical data.
SRL3
The Social Readiness Level (SRL) of our innovation is estimated at SRL 3–4. Initial stakeholder consultations have been carried out, receiving positive feedback and early input from potential end users. A participatory design approach has been planned, involving the community through workshops, meetings, and surveys. Educational activities and awareness campaigns are also foreseen to increase public acceptance and encourage long-term engagement with the system.

See more information about this level and the TRL and SRL levels.

Business plan completed

The BRIGAID Business Development Programme has been successfully completed. A MAF+ assessment has been conducted and its results have been enriched and incorporated into a business plan document.

The system’s main components have been individually tested, and an initial integration has been completed.

Credits
CREDITS
designer - Witold Śliwa / Sliwa Dobosz Architekci
designer - Maciej Dobosz / Sliwa Dobosz Architekci
Collaborators
COLLABORATORS
PhD, DSc, Eng. Tomasz Bergier, prof. AGH
PhD, DSc, Eng. Andrzej Poniewierka

How does it work?

The modular vertical waterfront bioretention system uses prefabricated concrete modules filled with substrate layers and planted with native vegetation. It captures rainwater from roofs, terraces, and paved areas, storing it in a retention tank. From there, it is distributed via controlled drip irrigation to the modules. Soil and plants retain water, filter pollutants, and improve water quality, while evapotranspiration cools the surroundings. The structure protects riverbanks from erosion and flooding, increases biodiversity, and enhances the aesthetics of public spaces.

Developed in cooperation with AGH University in Krakow, this innovation applies vertical bioretention modules as part of urban riverbank reinforcement. Prefabricated concrete units are filled with layered substrate designed for water filtration and retention, and planted with native species chosen according to moisture and sunlight needs.
Rainwater collected from roofs, terraces, facades, and pavements is directed to a retention tank, then delivered to the modules via a drip irrigation system. As water passes through the substrate, pollutants are removed, and excess water is discharged in a controlled manner.
The system combines engineering functions (flood protection, bank stabilisation), ecological benefits (improved water quality, increased biodiversity, reduced urban heat island effect), and social impact (revitalised riverfronts, more attractive public spaces). Its modular design allows scalability and adaptation to diverse locations and hydrological conditions.

Effectiveness may be reduced during floods, in areas with high groundwater levels, or on unstable banks without reinforcement. Limited riverbank space can reduce retention and greening potential.

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