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Face à la montée des eaux, les maisons flottantes néerlandaises s’exportent

By Annick Capelle
RTBFR.be
December.12.2018
Photo credit: Radouane El Baroudi

Dans un quartier calme de Delft, cinq maisons modernes se reflètent dans un bassin d’eau, créant un effet miroir. Reliées à la terre, par un simple ponton, ces maisons flottent. Olaf Janssen vit dans l’une d’elles avec sa famille depuis 2013. “Nous avons conçu cette maison de façon telle qu’il n’y ait plus de frontière entre la maison et la natureexplique-t-il en ouvrant les deux immenses baies vitrées du sol au plafond.

La maison est construite sur trois niveaux. À l’étage inférieur, les chambres sont littéralement immergées. À travers leurs fenêtres situées en hauteur, le regard frôle le niveau de l’eau. “C’est ce qui rend cet endroit si particulier. De temps en temps, on voit passer un canard ou une oieraconte Olaf en souriant.

Au niveau supérieur, une autre chambre, et même une terrasse sur le toit surplombant le quartier et le parc adjacent. Sous le ponton, des tuyaux flexibles amènent l’eau et l’électricité, et permettent l’évacuation des eaux usées.

Olaf Janssen a construit lui-même sa maison. Son entreprise, “Balance d’eau”, s’est spécialisée dans le créneau des maisons flottantes. Selon lui, le prix de vente de sa propre maison s’élève à 750.000 euros. Un prix normal pour les grandes villes néerlandaises. D’autant que la surface totale de l’habitation est de 220 mètres carrés : “La construction d’une maison flottante coûte 10 à 20% de plus qu’une maison classique. Mais le prix du lotissement sous l’eau, est moins élevé. Donc ça compense le surcoût“.

Le principe d’Archimède

200.000 kilos, c’est le poids de l’habitation d’Olaf Janssen. Et pourtant, elle flotte, comme un bateau. Le secret ? Un immense caisson moulé de béton sous le bâtiment qui permet la flottaison, selon le principe d’Archimède. La structure de l’habitation est légère, ce qui assure une grande stabilité. “Quand il y a beaucoup de vent, ça bouge légèrement. Mais il ne faut pas s’accrocher pour autant.

Pour éviter qu’elle ne parte à la dérive, la maison est arrimée à des piliers immergés. En fonction du niveau de l’eau, elle monte ou descend le long des piliers. “S’il pleut très fort, la maison s’élève. Et donc, on a une vue différente, puisqu’on est plus haut… Une différence de niveau qui, en période de fortes pluies, peut aller jusqu’à 25 centimètres, selon Olaf.

L’eau : la recette de la ville du futur

Depuis plusieurs années, les maisons flottantes se multiplient aux Pays-Bas. On en dénombre près de 2000 aujourd’hui. À lui seul, le quartier d’Ijburg à Amsterdam accueille pas moins de 90 habitations flottantes. Dans ce pays dont un quart de la surface se trouve sous le niveau de la mer, le changement climatique oblige, en effet, les ingénieurs et architectes à réfléchir à de nouvelles solutions face à une possible montée des eaux.

Dans le cabinet d’architectes Waterstudio, à Rijswijk, près de La Haye, le carnet de commandes ne désemplit pas. Sur les étagères, une enfilade de maquettes de maison flottantes. “Depuis des centaines d’années, les Pays-Bas ont été menacés par l’eau. Et puis, ça a basculé. Aujourd’hui, nous ne voyons plus l’eau comme une menace, mais comme une opportunité, commente Koen Olthuis, le directeur de Waterstudio.

Son crédo : faire de l’eau un atout, pour construire des villes plus sûres et efficaces : “Les villes d’aujourd’hui sont très statiques. Avec des bâtiments arrimés au sol que l’on peut difficilement déplacer. En construisant sur l’eau, on fait des immeubles que l’on vient glisser sur l’eau, et que l’on peut changer de place à souhait“.

Des villes entièrement modulables vouées à se multiplier partout sur la planète. “Nous pensons vraiment que l’eau est un ingrédient de la recette de la ville du futur. Dans 10-15 ans, dans des villes comme New York, Miami, Singapour, on utilisera l’eau pour construire des immeubles plus en phase avec le climat.

Koen Olthuis nous montre les maquettes de maisons, voire même de complexes d’habitations, destinés au Canada, à Dubaï, ou encore aux États-Unis. “L’habitation flottante ne cesse d’évoluer, mais pour nous, elle est d’ores et déjà devenue un vrai produit d’exportation.

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First floating duplex-house Schoonschip arrived at its location in Amsterdam

Schoonschip, the new and sustainable floating neighborhood in Amsterdam is now filling up with the waterhomes. A lot of different designers and architects brought here their concepts to live. Waterstudio was happy to help 4 families with realizing their dreams of living beyond the waterfront. A fantastic time lapse video was shot by Isabel Nabuurs Productie. This show the arrival and mooring of the first structures.

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Architects Worldwide Invent Groundbreaking Floating And Flood-Resistant Solutions To Climate Change

By

Sea levels are rising to new highs, temperatures are increasing, floods and storms are getting fiercer and more widespread, Hurricane Harvey battered Texas and Hurricane Irma devastated Florida and the Caribbean, and hundreds of millions of people along floodplains worldwide live under threat due to climate change. Nations like the Maldives have to build on water or move to flee rising sea levels, New Orleans has to battle storm surges and Jakarta has to cope with massive flooding. Inaction doesn’t always benefit cities, as innovations driven by changing realities can introduce new prosperity. Mitigating the effects of climate change is usually seen as a cost, but the resulting modifications made in cities can lead to long-term economic and social benefits. Climate change is not just about the risk of floods and drowning, but also the financial cost of damaged property and businesses and how it will redefine which parts of a city are sought after and which are unsafe. A one meter sea level rise would reorganize maps and affect financial stability in many of the world’s biggest waterfronts, and precious real estate in places like New York and Miami would be lost. Lots of land in Bangladesh, India and the Philippines would also vanish. Many of the water defense systems in the Netherlands safeguarding the country would become ineffective. World leaders may be delaying addressing the issue as they favor short-term strategies with immediate benefits, but in the meantime, certain architects are working on solutions to build more resilient structures on the water or to address flood protection on land and changing the rules that traditional urban planning has imposed upon us. By resolving the issues stemming from climate change and urbanization, water-based architecture is redefining urbanism. Offering a minimally-invasive method of construction, modern floating developments take advantage of coastal zones, rivers, lakes and canals in space-starved cities and provide flexibility as they may be modified, moved and reused until the end of their lifecycles when they are recycled. The technologies and innovations required for water-based constructions already exist, but now changing the perception towards floating schemes is key to a more sustainable and safer future able to meet modern-day challenges.

Waterstudio’s Citadel floating apartment complex composed of 60 units in The New Water, city of Westland, The NetherlandsCOURTESY OF ARCHITECT KOEN OLTHUIS – WATERSTUDIO.NL

 

What if instead of fighting rising sea levels, we embrace the water by integrating it into our cities, creating resilient buildings and infrastructure that can deal with extreme flooding and heavy rains? As many metropolises are situated near the water, it is logical that cities will find a way to live with the water instead of relocating inland. A leader in floating architecture who sees the potential that water can bring in making cities more resilient and safer, Koen Olthuis and his Amsterdam-based firm Waterstudio founded in 2003 – among the first to focus exclusively on waterborne architecture – have been showing the benefits of building on the water and how befriending water is a means for survival. This is an architect who was raised in an artificial landscape engineered for water, as about one-third of the Netherlands with over 60 % of the country’s population lies below sea level, and the Dutch have spent the last thousand years constructing storm surge barriers, dikes, pumps and drainage systems to keep the North Sea out. Experts in high-tech engineering, water management and resilience planning, they have installed lakes, parks, plazas and carparks that serve social needs, but also double as giant emergency reservoirs for when floods occur from storms now predicted to happen every five to 10 years. Water has been a way of life in the Netherlands and foreign delegations from Jakarta, Ho Chi Minh City, New York and New Orleans often visit to learn from them. Climate change adaptation is high on the public agenda although the country hasn’t met with a disaster in years because the population has seen the benefits of improving public space, which is the additional economic value of investing in resilience.

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Nederlander ontwerp orkaan bestendige woonboot 3.0 a twee miljoen dollar

By Colouful Rebel

Mooi om te zien hoe verschillend objecten worden genoemd, afhankelijk van de locatie het object zijn plek vindt. Zo noemen wij hier in Nederland een huis op het water gewoon een woonboot, maar in Amerika noemen ze het een ‘Luxury Floating Home’. Wat jullie willen, maar wij blijven het gewoon een woonboot noemen! Toch hebben deze luxe woonboten een nogal Nederlands tintje, omdat ze zijn ontworpen door Koen Olthuis. De beste man is een waar genie als het aankomt op wonen op water. Mocht je daar meer over willen weten, dan vind je onderaan dit artikel een toffe Tedx Talk met Koen.

Omdat Amerika en de Caraïben eigenlijk altijd wel getroffen worden door orkanen, heeft Koen gekeken hoe hij huizen kan ontwerpen die hiertegen kunnen. Zijn oplossing is simpel: bouw ze óp het water. Samen met de startup Arkup heeft Koen huizen ontworpen die tegen categorie 4 stormen kunnen. Olthuis en Arkup noemen de huizen zelf ‘livable yachts’, omdat ze ook zijn uitgerust met een motor om eventueel naar een veiligere plek te varen. Wij zijn in ieder geval behoorlijk onder de indruk van het gedurfde ontwerp.

 

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Koen Olthuis ontwerpt varende villa

By Robert Muis
Architectenweb
Oktober.26.2018
Photo credits: Waterstudio

 

Architect Koen Olthuis van Waterstudio.NL heeft voor de catalogus van de Amerikaanse onderneming ARKUP een ‘woonjacht’ ontworpen. Een eerste exemplaar van de varende woning wordt momenteel gebouwd en zal te zien zijn tijdens de Fort Lauderdale International Boat Show, die in februari 2018 plaatsvindt.

Het Next Generation Floating House is vormgegeven als een luxueuze en ruime drijvende villa. De woning biedt een oppervlak van ruim 400 m2.

Varen of staan
Het ontwerp van Koen Olthuis onderscheidt zich verder van de gewoonlijke drijvende woningen doordat het zichzelf kan voortstuwen. Voorzien van elektrisch aangedreven schroeven verandert de drijvende woning in een ‘bewoonbaar jacht’, in de woorden van de firma ARKUP.

Het ontwerp heeft nog een opvallend kenmerk. De drijvende villa is voorzien van een hydraulisch systeem waarmee het vier poten op de bodem kan zetten, indien de bewoners meer stabiliteit wensen. Het hydraulische systeem kan de villa zelfs boven het wateroppervlak uit tillen en het systeem zou zelfs orkanen kunnen weerstaan.

Zelfvoorzienend
Het Next Generation Floating House is in hoge mate autonoom en milieuvriendelijk. Het functioneert geheel op zonne-energie en is onder meer voorzien van een systeem voor opvang en zuivering van regenwater.

Het ontwerp kan naar wens van de potentiële koper worden aangepast. Olthuis heeft het Next Generation Floating House ontworpen voor de specifieke omstandigheden van de wateren van Florida, maar de drijvende villa kan aan andere omstandigheden worden aangepast.

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Die Neue Aqua-Kultur

By Till Briegleb
AW Complete

Überall in der Welt haben Städte in den letzten Jahren irhre Wasserfronten aufgewertet, häufig indem sie zentrumsnahe Hafengebiete in neue Viertel umwandelten. In Aarhus wurde als erster Signalbau fur das Vorhaben, 25000 Bewohners auf den alten Kaianlagen anzusiedeln, der “Eisberg” von Julien De Smedt errichtet, eine spektakuläre Wohnanlage mit Bezug zum Meer.

 

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Construction in progress Floating Duplex in Amsterdam

This floating duplex building designed by Waterstudio is now under construction. The images below show the progress. The building will be built up on land, later the whole element will be placed in the water and shipped to its location in Amsterdam. The images show perfectly the floating base and the superstructure. This floating structure will be cladded with different patterns of wood, as in a patchwork.

We will keep you updated!

Les projets de villes du futur les plus fous

By Par Jean-Luc Barberi et Laurent Martinet
L’Express
August.01.2018

Et s’il y avait d’autres façons d’habiter la planète Terre? Voici quelques projets, plus ou moins avancés!

Avec une population mondiale qui ne cesse de croître, et des villes qui vont devenir de plus en plus denses, il faut trouver de la place pour des humains qui se préoccupent de plus en plus de leur environnement. Au point qu’ils rêvent de vivre en pleine nature, sans rien perdre des bienfaits de la technologie… Une gageure que relèvent pourtant nombre d’architectes avec des projets plus ou moins utopistes. Certains sont déjà sortis de terre, d’autres n’existent que sous forme de dessins, mais tous ont en commun de vouloir réconcilier tech et développement durable. Exemples.

Sea Tree, la mégapole flottante

A nouveau la mer, mais sans larguer les amarres. Conçue par le cabinet d’architecture néerlandais Waterstudio, et encore dans les cartons, Sea Tree est une construction en forme d’arbre de mer destinée à flotter le long des côtes qui bordent les grandes métropoles, comme New York ou Rio de Janeiro.

Bâtie suivant les technologies des plateformes pétrolières offshore, flottante et arrimée par des câbles, cette structure entièrement végétalisée abrite aux côtés d’espaces laissés à la vie sauvage des potagers verticaux et des terrasses plantées destinées à l’alimentation des citadins. Les Sea Tree ont aussi pour rôle de capter les émissions de carbone des mégapoles. Elles seront des refuges pour les animaux utiles à la vie urbaine, comme les oiseaux, les abeilles ou les chauves-souris insectivores. Gagnées sur la mer, les Sea Tree – qui peuvent être construites en de multiples exemplaires – permettraient d’agrandir les espaces naturels et sauvages des métropoles existantes en s’affranchissant de la pression foncière.

L’ Express, 1 august 2018, Par Jean-Luc Barberi et Laurent Martinet

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Koen Olthuis speaks at Equinor

Equinor, formerly Statoil, have established Equinor Inovation Team to look into new business opportunities for the traditional oil and gas company. Its role is to explore and mature radical ideas and business model innovation.

Koen Olthuis was one of the keynote speakers among other architects, engineers, urbanists and visionaries. Adressing his vision about the possibilities of  Blue Cities, and the future of offshore structures.

Are Blue Cities a future of urban life?

By Evolve Arena & Björn Audunn Blöndal
Evolve arena
May.2018

 

The ocean might be the prime real estate of the future cities. This is what Equinor Innovation Team is set to explore in a series of expert workshops on the topic of floating cities.

The idea to explore Floating Cities at Evolve Arena in 2018 was initially brought by Anastasia Malafey, project leader at Evolve Arena in the meeting with Margaret Mistry, Strategy & Innovation projects leader at Equinor Innovation Team. Their common understanding that this can create new business applications and solve global urban development problem made them continue the dialog and turn discussion into action.

— For Equinor, the ocean space has been a massive source of value creation and competence building. Over the past 40 years, we have become the biggest offshore operator, we know marine operations, and we are a world leader on floating wind turbine farm market. Far from shore is where we feel close to home, says Anders Hegner Hærland, vice president at Equinor Innovation Team.

Is blue cities the future of urban life?
EQUINOR KICKSTARTED A SERIES OF EIGHT EXPERT WORKSHOPS WITH THE FUTURE OF FLOATING CITIES ON THE AGENDA. (PHOTO: BJÖRN AUDUNN BLÖNDAL/PRESSWORKS)

Equinor, formerly Statoil, have established Equinor Inovation Team to look into new business opportunities for the traditional oil and gas company. Its role is to explore and mature radical ideas and business model innovation. With a legacy stretching more than four decades back, Equinor, former Statoil, have drilled, built and run project both far out and deep into the sea. With high end skill, competence and a worldwide network of suppliers, Equinor is one of the companies most suited for being a major player in the arena of building the future of floating cities.

To kickstart a phase of exploration and learning Equior have invited companies, architects, engineers, urbanists and visionaries to a series of workshops. The workshops are facilitated by Xynteo and will be held in Equinors offices on Fornebu outside Oslo and other sites. The sessions are also live broadcasted to off-site participants.

— Building on our experience of the ocean as a commercial space, it still feels like a big step to the inspiring vision of Floating Cities. To most people, it might seem like a distant idea, but today major cities are running out of space to grow. Infrastructure is overloaded and quality of life for inhabitants diminished, Anders Hegner Hærland explains.

— The phase we are embarking on now is the exploration phase, says Margaret Mistry, Strategy & Innovation Projects Leader in Equinor Innovation Team.

— Evolve Team is grateful to see the high level of engagement and interest from Equinor Innovation Team, Xynteo and all partners involved. Now it is time for Equinor to step out of its comfort zone and become a spearhead and leading force toward new alternative applications of its competence and experience in solving major global challenges. We believe this explorational sessions and event at Evolve Arena give us unique opportunity to connect innovators, creative minds and industries and build clear momentum toward sustainable society, says Anastasia Malafey, project leader Evolve Arena.

— It’s an invitation to join us in exploring these possibilities together. Our conviction is that the technology, the commercial ideas, and the other ingredients for making floating cities a reality are within our grasp. But realizing them will require more than any one company can achieve alone. So we must begin with dialogue and collaboration, Margaret Mistry explains.

Floating cities represent a huge potential for urban development, food production, energy generation and minerals extraction on and under the water nearby coastal cities.

Is blue cities the future of urban life?
FLOATING VILLAS IN NETHERLANDS.(PHOTO: FRISO SPOELSTRA)

The first keynote speaker kickstarting the sessions is Koen Olthuis, visionary architect and CEO of Waterstudio, a dutch architectural firm that is set to develop solutions to the problems posed by urbanization and climate change. Olthuis compares the future of floating cities with smartphones populated with apps.

— Why can’t we use the cities like we use the smartphone? Why can’t we have floating buildings with different functions that we can move in and out as we need them — like floating city apps.

Olthuis elaborate how we can see projects as a service. Like for instance the Olympics, why do we build large stadiums and other facilities that is only used for a few weeks during the games? Why can’t we see expensive buildings like a floating stadium as a global asset that can be moved wherever the games are arranged? Qatar has already plans for renting huge cruise ships and connect them to a floating harbour and use them as hotels during the Olympic Games.

Blue Tech for Blue Cities
Building on water, done correctly, can also have huge environmental impact
Olthuis calls it blue tech for blue cities focusing on energy reduction, energy production and energy storage. As an example he mentions a breakwater project in New York that Waterstudio contributed in where huge rotating pillars serves both as breakwater, providing shelter and safe harbourage, as well as a dynamo, generating renewable energy.

Floating solar panels is another field of focus, as the global benefit of moveable panels would have enormous impact, and be of great value where electricity is needed.

Is blue cities the future of urban life?
KOEN OLTHUIS, VISIONARY ARCHITECT AND CEO OF THE DUTCH ARCHITECT COMPANY WATERSTUDIO WANTS TO BRING THE CITIES TO THE SEA. (PHOTO: BJÖRN AUDUNN BLÖNDAL/PRESSWORKS)

Floating structures can also be beneficial for life at sea, both above and under the water. Olthuis have designed large steel structures based on existing offshore oil platforms. Built with layered floors with threes and plants above the water and aquatic plants under sea level, this can stimulate a wildlife oasis in urban areas.

Is blue cities the future of urban life?
SEA TREE BY KOEN OLTHUIS.

— Oil companies have used these floating storage towers for years, we only gave them a new shape and function, Olthuis explaines.

To bring floating cities at scale we must move from pioneering, innovation and experimenting to standardization and regulations. At the same time we should take advantage of this phase of experimenting, because when things are standardized, the innovation will slow down, says Olthuis.

— Lack of regulation makes it simpler to experiment.

Olthuis emphasise that floating cities is not something that is happening in a science fiction future. Its happening now. There are several projects already in progress all over the world.

— Its not like we are building huge cities in the middle of the ocean. The first floating cities will be hybrid cities where part of the city is on the mainland and new facilities and functions are added on the water like an extension of the city. This kind of tech and mindset can change the structure of a city in a real short period of time.

In Desember Oslo will be the scene for a ground breaking exhibition and conference Evolve Arena on the theme of shaping the future of our cities. Equinor and Xynteo will host one of the side events workshops at the Evolve-conference.

Is blue cities the future of urban life?
— THE PHASE WE ARE EMBARKING ON NOW IS THE EXPLORATION PHASE, SAYS MARGARET MISTRY, STRATEGY & INNOVATION PROJECTS LEADER IN EQUINOR INNOVATION TEAM. (PHOTO: BJÖRN AUDUNN BLÖNDAL/PRESSWORKS)

— We will use the Evolve platform to host another creative work session with partners where we hope to emerge with a better understanding of where we can play a role and a unifying idea about the solutions that will bring affordable and viable floating cities a step closer to realisation, says Margaret Mistry.

Article deliver in collaboration with Björn Audunn Blöndal / PRESSWORKS

Cover picture: Floating harbor with cruice ships as temporary hotels by Koen Olthuis /WATERSTUDIO

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