In a B-rain Connect neighbourhood or street...

not a drop of rainwater is lost
greenery gets all the space it needs to grow
we make way for biodiversity
we build to suit people
we work smartly below ground, and multifunctionally above it
we always opt for sustainable and circular materials

Case Wiekevorst - APART architecten

Building blocks

Blue vein

The 'blue vein' is a precast concrete chamber that provides local recovery, buffering, reuse and infiltration of rainwater.

Built-in gutters and lids also provide space for utility pipes and connections to houses. The slabs on the chamber provide optimal accessibility and easy maintenance.

Salt lock

By spreading salt excessively during snowfall and prolonged droughts in summers, the impact of salt accumulation on trees in urban environments is severe and pernicious to their health. Resulting in leaf death, trees have little chance of survival.

The 'salt lock' combines proven techniques in 1 unique patented product that provides an answer to these problems.

Also nominated for the Vlario Innovation Award 2023

Green island

The 'green island' is a precast concrete tree bunker with built-in gully and salt lock. The internal water management ensures that the tree is always the first to receive water, free of harmful salts.

The tree itself also acts as an additional filter, allowing only clean water to infiltrate locally, at the bottom of the chamber. Excess water is drained into a connecting chamber (e.g. blue vein).


Coping with flooding and water scarcity within spatial planning is quite a challenge. Business sites and public spaces will increasingly have to take this into account in the future.

HYDROPS® offers an efficient buffer and infiltration system for optimal rainwater management, specifically for sites with a shortage of space and high groundwater levels.

Within this system, rainwater is diverted via prefabricated gutters into concrete chambers. In these chambers, sludge is captured and absolute purification takes place. The treated water is distributed and temporarily buffered, via a perforated pipe in the open foundation.

If the nature of the site allows, the water infiltrates into the subsoil via the bottom and side walls of the basin.

Eco Solutions

Both levelling and permeable bricks channel excess rainwater to the ground. The water-permeable bricks, with their clean lines or cheerful angular shapes, lead the water to the ground via the wide joints.

The water-permeable brick is porous. So the brick does without wide joints, but with an open concrete structure that allows water to soak through. Both types are comfortable to ride by bicycle and walk on foot.