Central attenuation and drainage system

Bundled water storage capacity

In some cases, the existing system is insufficient to cope with the amount of rainwater. This may be due to housing development, if several systems intersect or if rainwater storage requirements cannot be met with the existing solution. For these and other situations, a central attenuation and drainage system is the perfect solution.

Using a central attenuation and drainage system, the water is drained from a surrounding area towards a central place. This is often a car park, square or park. The rainwater from the surrounding area is captured at this central place and infiltrates either into the groundwater or by gradual discharge to the sewer system.

The size of this type of solution varies widely, depending on the storage requirements and the surface area that needs to be decoupled from the sewer. That surface area can range from a single building to part of a residential area.

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Rockflow - Deurne - Sancta Maria - Grote buffer

Projects using central attenuation and drainage systems

Dozens of European municipalities have installed Rockflow’s central attenuation and drainage system. We describe some of our recently completed projects below. For many projects, the objective is to increase the capacity of existing solutions by storing water centrally.

Rockflow - Beverwijk - Brink - Case - Stedelijke klimaatadaptatie

Solution: Central attenuation and drainage system

Climate adaptation for Beverwijk apartment complex with Rockflow

In Beverwijk, the Netherlands, a new construction project is not allowed to discharge rainwater via the sewer system. The apartment building with 94 sustainable, gasless homes will therefore be equipped with a Rockflow central attenuation system under the building and a water-buffering roof with stone wool elements under a sedum cover.

watermanagement, system, amsterdam, rainproof, rockflow, climate, lapinus

Solution: Central attenuation and drainage system

Amsterdam becomes rainproof with Rockflow

Platform 'Amsterdam Rainproof' has the aim of making Amsterdam resistant to the increasingly frequent downpours. The sustainable solution Rockflow helps Amsterdam to combat flooded streets and basements due to intense rainfall.

lapinus, rockflow, water management, case study, Hedemora, Zweden, Sweden

Solution: Central attenuation and drainage system

Hedemora installed Sweden’s first Rockflow rainwater buffer

Sweden also suffers with increasingly extreme rainfall in the summer. Hedemora, a town in a hilly landscape where rainwater has always found a natural way, is the first municipality in Sweden where the increasing flooding is counteracted with a Rockflow rainwater buffer.