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Insufficient infiltration capacity

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Rainwater flooding

Flooding due to heavy rainfall or high surface water levels.

The infiltration capacity of the "Piet Mondriaanplein" (square) in Amersfoort needs the improve to prevent rainwater flooding. Besides that, one wanted to recycle the paving stones.


Draining grout

Draining grouts are sturdy needle felt strips of plastic that are placed between the paving.
The draining grouts are placed in a strip of 2 meters around the square. Rainwater is led to this strip by the shape of the square. The water flows through draining grouts in the water retaining foundation after which it infiltrates in the ground.

drainvoeg amersfoort


  • Recycling of the material.
  • No rainwater to the WWTP.
  • Little maintenance need.


  1. Topic Urban water
  2. Development state 10: Proven in operational situation
  3. Setting type Urban area
  4. Water type Rainwater
  5. Project period 0-3 months