Luchtfoto van de Waterkaravaan drijvende tuinen Coen Dijkstra

Floating gardens

Ten other gardens with Amsterdam Canal Wood

In many waterways, nature has little chance to thrive
due to hard quays, wind, and currents.
These Waterkaravaan gardens provide structure, shelter, and places of recovery.
Various planted, porous matrices create space for micro-life and riparian nature.
Made with local, reused compostable materials
and built and maintained by a social workplace.

Photo Waterkaravaan with canoeists: Coen Dijkstra

Ecology conditions

How do you create sufficient leeway against currents, waves and wind? How do you create structure, a three-dimensional matrix that provides support to plant roots and (micro) organisms? How to start a food chain

Plants

Native (local) plants are used that fit here, and that are also host plants for local insects and animals. Many different shore and aquatic plants have been planted, and it remains to be seen which plants are doing better or less well. Aquatic plant growers are closely involved in this project, what you might call an experiment. Especially when the plants thrive underwater, we are particularly satisfied. After all, they are having quite a tough time in the city, and it is quite a challenge.
Plants were adopted after the fireplace (when they clear the ditches in the autumn), plants were grown locally for this project, and plants were purchased from growers. An important requirement is that they can withstand Amsterdam's moderately brackish water, which is in open connection with the North Sea Canal. So there is a bit of salt in this, the percentage varies and depends on many factors.

Eisen en wensen aan het ontwerp

Alle tuinen voldoen aan het Programma van Eisen - en Wensen, die als richtlijn werd gebruikt voor keuzes in het totaal ontwerp, en de keuze voor meewerkende partners met hun eigen tuinmodules, planten en materialen. In de praktijk worden telkens weer ontdekkingen gedaan die leiden tot nieuwe ontwerpinzichten, de zogenaamde design-feedback-loop. Er gaan ook soms dingen mis, en dat is onderdeel van het pionieren.
Ontwerpeisen zijn bijvoorbeeld: geen schaduwhinder voor bestaande of potentiële bodemnatuur, geen toxische stoffen of plasticvervuiling, alleen bouwmaterialen die composteren onder natuurlijke omstandigheden m.u.v. de rvs-verbindingsmiddelen, alleen inheemse en brakwater-tolerante planten.
Ontwerpwensen zijn bijvoorbeeld dat de matrices (driedimensionale structuren) optimale luwtes creëren voor waterleven, dat de structuren, planten en al het leven wat ze aantrekken een optimaal effect heeft op de waterkwaliteit en de biodiversiteit in en rond het water, en dat betekent ook dat er zoveel mogelijk planten wortels in het water hangen. Een andere wens is dat de gebruikte materialen zo lokaal mogelijk verkregen en/of hergebruikt zijn.Ook is het belangrijk dat dat de tuinen weinig onderhoud vergen, en dat je met onderhoud de tuinen kunt sturen in hun soortenrijkdom en zuiverende werking.

Drijvende tuinen materiaal collage

Use of materials

How do you make a floating garden if you don't want to use plastic or styrofoam? How do you ensure sufficient buoyancy even when the plants are getting heavier? Which local materials are suitable for this, and can you also use residual materials? Which parts should last a long time and which parts are allowed to compost more quickly under natural conditions?
The starting point here is that the shell and the connections last a very long time, but that some initial structures may perish: root packages from the plants themselves partly take over. This way, you can use more local and natural materials.

Amsterdams Grachtenhout

Veel van de Amsterdamse kades zijn rond 1880 gebouwd. Hiervoor zijn palen, kespen en planken gebruikt van Europees naaldhout. Dit komt van bomen die rond 1800 zijn aangeplant.
De Gemeente Amsterdam wil al het stadshout dat vrijkomt graag lokaal hergebruiken. Dit grachtenhout mochten wij daarom toepassen als drijvend kader voor de drijvende tuinen. Zo krijgen die oude bomen weer een nieuwe ecologische functie in de stad.

Hellingtuin van droog naar nat

Slope garden

Inclinate Hortus

A closed floating shore aloud

This garden has a gentle slope from above water to below water, just like a natural shore.

Inloopbar met Craybar buis

Walk-in garden

Hortus ambulare in

An open floating shore aloud with Craybar

This garden also offers a gentle slope that runs from above water to below water.

Moerastuin van de Waterkaravaan

Swamp Garden

Hortus paludis

A swamp that floats on cork

Originally, the Amsterdam landscape consisted mostly of wetland and peatland. In the Waterkaravaan, Helkant Plant experiments with a swamp cushion.

Zijkant van de houtjestuin

Woody garden

Ligno Hortus

Grow up protected among the sticks

In a special combination, 4 types of wood are cleverly combined: Douglas beams, pine bars, willow branches and cork floats.

Luwe tuin

Secluded gardens

Horti tecti

Low zones above and below the water

This garden has all kinds of delights, big and small. The wooden frame with a planked bottom forms a “tub”.

Schuimtuin

Foam Garden

Spuma hortus

Lots of cavities with gabions and glass foam

This garden also has many cavities, even at the micro level. The wooden frame made of Amsterdams Grachtenhout forms the basis.

Plateautuin met toren

Plateau garden

Campestria Hortus

Robust wood structure for riparian plants and insects

The willows and flowers on the plateau garden are valuable to insects.

drijfland met wortelbeton rietblokken

Floatland

Terra fluctuations

Floating land of living Root Concrete©

Erik Hobijn (Folded Oever) developed an entirely new, 100% plant-based and circular building block: Root Concrete©

Zonnetuin opgetild

Solar garden

Sol Hortus

A paradise for aquatic plants and smaller fish

There are almost no plants in this garden above water, even more underwater.

Restjestuin schuin

Leftovers garden

Relictus Hortus

Nests and mangroves from waste streams

Do you want to create a floating garden without buying anything? That's possible.

Research on the Waterkaravaan

practical research in the Kleine Noorderijplas

In the autumn of 2025, the floating gardens will be moved to the Kleine Noorder IJplas. Here they lie quietly for a multi-year monitoring and research process. The plan is to carry this out with the support and participation of Rijkswaterstaat, Waternet, Waardenburg Ecology, and TAUW (ecological research) and social firm Amsterdams Grachtenhout (maintenance). NOVAMBER ensures substantive coordination, design research and publication of the results.