FLOW Pavilion

FLOW Pavilion is a proposal for a campus space where visitors can see how rainwater and wastewater are collected, treated and reused.

By FLOW Team 24/25

The Four Pillars

  • The proposed system collects rainwater, treats greywater and filters water for reuse. Visitors would be able to follow these processes rather than see only the finished output.

  • The design uses constructed wetlands, green roofs and rain gardens to store and filter water. These planted areas are intended to support habitats and help the site cope with heavy rain and dry periods.

  • Interactive exhibits would show visitors how the water system works and where they can save water at home. The aim is to make everyday water use easier to understand.

  • The pavilion is designed as a shared space on campus, with:

    • Meeting spaces: Flexible areas for students, staff and visitors to meet and work together.

    • Events and activities: Workshops and exhibitions about water and sustainability.

    • Community: A place open to people across campus, including those who might not otherwise meet.

Towards our Vision

Water reuse on campus

The proposed pavilion combines a campus meeting space with a closed water loop. Visitors would be able to follow the treatment process through exhibits.

How the water system works

The design combines natural filtration, rainwater harvesting and greywater treatment. Interactive exhibits would let visitors follow the water through these stages.

Views of the pavilion

  • Aerial rendering of the proposed FLOW Pavilion and its water landscape at TU Delft.

    FLOW Pavilion in its campus setting

  • Rendering of the pavilion from across the water, with seating and open sides.

    View across the water

  • Rendering of a walkway beside the pavilion and planted water landscape.

    Walkways through the planted landscape

  • Rendering of the pavilion across its water landscape, viewed from the campus plaza.

    View from the campus plaza

  • Rendering of seating inside the pavilion beneath exposed beams and pipework.

    Interior seating and shared space

  • Rendering of interior seating beside the pavilion’s visible water treatment equipment.

    Seating beside the water system

  • Rendering of water treatment tanks and pipes inside the pavilion, with visitors and seating.

    Water treatment equipment on display

Two pavilion modules combined into the proposed plan and three alternative arrangements.
Four interchangeable wall panels shown around the pavilion plan and alternative layouts.
Roof plan showing four inward slopes directing rainwater to a central drain.
Roof section showing two slopes directing rainfall into a central collection pipe.
Exploded roof detail with the lightweight roof, angled timber beams, steel connection and glulam frame.
Section through FLOW Pavilion’s water tanks and constructed wetland.
Long section through FLOW Pavilion’s frame, central roof valley and internal spaces.
Side section showing FLOW Pavilion’s timber columns, roof and interior wall panels.

Alongside the water exhibits, the pavilion would host workshops and discussions for students, staff, businesses and public organisations. The aim is to connect people working on water with the campus around them.

The proposal responds to water challenges in South Holland. We want the pavilion to be a place to test ideas locally and share what we learn with others working on water reuse.

Water reuse beyond campus

Other Works
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2025/2026 CoFlow