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3D Printing of coastal protection Reefs

The Albanian coastline has been declining in recent years due to coastal erosion and uncontrolled...

Polder Roof (Polderdak)

The Polder Roof stores heavy rainfall on flat roofs to prevent urban flooding, to reduce heat stress, and to use rainfall during droughts.

Developed by Polderdak BV

The Polder Roof transforms a flat roof so that it is able to collect and store water. This storage is controlled and can be drained at any chosen moment. The Polder Roof functions as a foundation for a green roof, roof garden, solar park or roof park.

TRL7. Integrated pilot system demonstrated
ProSystem prototype demonstration in operational environment. Prototype near or at planned operational system. Represents a major step up from TRL 6 by requiring demonstration of an actual system prototype in an operational environment. The Polder Roof has already been implemented on several pilot roofs in the Netherlands. We want to test en optimize the algorithms that decide to retain the stored water or not. We intend to enhance these algorithms, add (probabilistic) forecasts and models and test them on a Field Lab at the Civil Engineering faculty of Delft University.

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

The main components of the system have been tested separately, and an initial integration exercise has been conducted.

Credits
Collaborators

How does it work?

The Polder Roof consist of a buffer system and a Smart Flow Control. Rainfall is directly stored in a buffer system on a flat roof. The standard capacitiy of this buffer system is 70 mm. This storage is automatically controlled by our Smart Flow Control (SFC) which collects meteorological data and communicates with a web-application. The Smart Flow Control uses algorithms to decide to retain the stored water or not.

Limitations/conditions under which this innovation does not work or is less effective

Mainly building conditions (stability, roof slope, roof segmentation and minimal area)

Added value
The Polder Roof combines storage of heavy rainfall and usage of rainfall.

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