Maldives Archives - Page 6 of 10

Vingt mille lieux sur les mers

By Frederic Joignot
Le Monde

Vinght mille lieux sur les mers: Comment les architectes voient la vie sur l’eau

Projet “Citadel” d’appartements, agence Waterstudio (Hollande). Il s’agit de construire dans des polders ouverts des habitations flottantes adaptées à la montée des eaux. C’est une “citadelle” parce qu’il s’agit “du dernier rempart contre la mer”, disent les architectes.

Un vieux rêve de l’humanité est de se réfugier sur une île pour y refaire sa vie, voire le monde, inventer une société meilleure, expérimenter des voies nouvelles pour l’humanité. C’est sur une île que Thomas More situait Utopia (1516), sa société idéale, au cœur d’une île encore que Tommaso Campanella imaginait la Cité du Soleil (1602) ou Sir Francis Bacon La Nouvelle Atlantide(1624), menée par les philosophes. Aujourd’hui, ces utopies insulaires sont rattrapées par la réalité terrestre : construire des cités écologiques sur des îles nouvelles est devenu un mouvement architectural. Né dans l’urgence de la menace environnementale, ce courant qui a gagné l’urbanisme interpelle, depuis dix ans, économistes, institutions internationales et gouvernements.

Ce mouvement a un drapeau – bleu, couleur des océans – et un pays pionnier : les Pays-Bas. Elu en 2007 parmi les personnes les plus influentes de l’année par le magazine Time, l’architecte Koen Olthuis, cofondateur de l’agence Waterstudio, à Ryswick, est l’un de ses praticiens et théoriciens. Il signe ses mails Green is good, blue is better (« le vert [le souci écologique], c’est bien, le bleu, c’est mieux ») et avance plusieurs arguments pour expliquer pourquoi construire sur les mers est une idée d’avenir : « D’ici 2050, 70 % de la population mondiale vivra dans des zones urbanisées. Or, les trois quarts des plus grandes villes sont situées en bord de mer, alors que le niveau des océans s’élève. Cette situation nous oblige à repenser radicalement la façon dont nous vivons avec l’eau. » Car, rappelle-t-il, les cités géantes du XXIe siècle sont mal en point : « La préoccupation “verte” qui saisit aujourd’hui architectes et urbanistes ne suffira pas à résoudre les graves problèmes environnementaux des villes. Comment allons-nous affronter les problèmes de surpopulation ? De pollution ? Résister à la montée des eaux ? » Sa réponse : en bâtissant des quartiers flottants, de nouvelles îles, en aménageant des plans d’eau pour un urbanisme amphibie. « La mer est notre nouvelle frontière », affirme l’architecte, détournant la formule de John Fitzgerald Kennedy. Car si l’espace manque sur terre, la mer est immense – et inhabitée.

Waterstudio n’est pas la seule agence néerlandaise à développer cette vision « bleue ». Plusieurs cabinets d’architecture et entreprises expertes, reconnues internationalement, bâtissent déjà sur l’eau. Il faut rappeler qu’aux Pays-Bas, contrée où l’on compte 3 500 polders et des villes sillonnées de canaux, s’adapter et résister aux assauts de la mer et aux inondations est une activité séculaire indispensable : en 1953, une violente tempête a causé près de 2 000 morts et provoqué l’évacuation de 100 000 personnes. Ce savoir-faire est devenu symbolique de la lutte de l’homme face à une nature menaçante, perturbée par le changement climatique. Désormais, « le monde est un polder », écrivait le biologiste Jared Diamond dans Effondrement. Comment les sociétés décident de leur disparition ou de leur survie (Gallimard, 2006).

Sauf que les polders, ces terres artificiellement gagnées sur l’eau, ne suffisent plus. Waterstudio a notamment conçu des maisons flottantes à IJburg, un quartier expérimental au sud-est d’Amsterdam. D’autres projets maritimes sont en cours. En 2009, l’agence a dessiné le projet Citadel, une cité flottante de 60 appartements installée dans un polder délibérément ouvert aux eaux. « Nous l’appelons Citadel, car ce sera la dernière ligne de défense contre la mer », explique Koen Olthuis, pour qui ce projet « montre clairement les possibilités infinies de la construction sur l’eau »

Au pays des polders, le fait de bâtir des immeubles flottants offre un complet renversement de perspective : « Nous cherchons à nous adapter à la mer, à l’accompagner, plutôt que lutter avec elle », explique l’architecte. Quand les habitations flottent, nul besoin de pomper l’eau, de renforcer en permanence les digues. Un nouvel urbanisme s’invente, où des quartiers entiers, jardins et maisons, reposent sur l’eau, parfois ancrés au sol, parfois mobiles. Une telle conception, avance l’architecte, va bouleverser toutes nos habitudes urbaines. Elle nous oblige à revoir « notre vision statique des villes » : la terre habitée ne sera plus tout entière « ferme ». Elle nous engage à repenser notre « exigence du sec » sur des territoires protégés par les digues, pour vivre sur l’eau. Elle annonce la multiplication d’habitats flottants et amphibies sur les zones côtières.

« Une ville plus mouvante, plus dynamique, se dessine. Certains habitats et services se déplaceront. L’urbanisme, la vie citadine vont en être transformés », conclut Koen Olthuis. Il n’est pas le seul à le penser. Du 26 au 29 août, signe des temps bleus à venir, se tiendra à Bangkok Icaade 2015, la première conférence internationale sur l’architecture amphibie. A Lagos, au Nigeria, l’architecte Kunlé Adeyemi a conçu une école flottante pour les enfants du bidonville de Makoko, sur la lagune. Posée sur des barils, équipée de panneaux solaires, elle a été inaugurée en février 2013. Kunlé Adeyemi prévoit de bâtir une flottille de maisons sur le même principe.

Les architectes de l’agence DeltaSync, à Delft, aux Pays-Bas, ont synthétisé ces idées dans un manifeste architectural et économique : « Blue Revolution ». Si les terres viennent à manquer, écrivent-ils, « où irons-nous ? Dans le désert ? Les ressources en eau manquent. Dans l’espace ? C’est toujours trop cher. Reste l’océan ». Notre planète de rechange est là. Car 71 % de la surface terrestre est maritime. Le texte continue : « Ce siècle verra l’émergence sur l’océan de nouvelles cités durables (…). Elles contribueront à offrir un haut standard de vie à la population, tout en protégeant les écosystèmes. Un rêve ? Non, la réponse au principal défi du XXIe siècle. »

L’agence DeltaSync, qui a construit en 2010 un pavillon flottant dans le port de Rotterdam, conseille le gouvernement néerlandais sur ses projets d’aménagement urbain, travaille sur la flottabilité et la stabilité de l’architecture aquatique. Elle développe avec l’université des sciences appliquées Inholland un projet de parc sur l’eau dans le port du Rhin, à Rotterdam : imaginez un petit archipel abritant un marché, une piscine, des restaurants, un centre de sport, une salle de concert. L’idée pourrait être reprise dans plusieurs villes néerlandaises, dans les ports ou sur des polders ouverts.

Un autre projet conçu pour un bassin portuaire est le Sea Tree, l’arbre de mer. Conçu par Waterstudio, encore dans les cartons, il révèle une autre dimension de l’architecture bleue : son exigence écologique. Il s’agit d’une haute structure en terrasses, entièrement végétalisée, construite selon les principes de la technologie offshore. Chaque grande ville côtière pourrait en installer. Ces arbres maritimes géants pourraient aider à lutter contre l’épuisement environnemental des grandes cités : ils comporteront des potagers verticaux et des terrasses plantées pour nourrir les citadins, ils capteront le CO2, ils abriteront quantité d’animaux utiles – oiseaux, abeilles, chauves-souris insectivores – qui rayonneront sur la côte et la ville proche. A Manhattan, à Singapour, les municipalités réfléchissent sérieusement à en installer, assure-t-on à Waterstudio.

On retrouve, dans ce projet de tour portuaire, plusieurs des idées-forces du courant dit de l’« architecture écologique », en plein essor. C’est un autre volet stratégique de la construction « bleue » : récupérer et consolider les principes de la construction « verte ». Autrement dit, s’appuyer sur les énergies durables (éolien, solaire, chauffage passif, géothermie), végétaliser les terrasses et les toits, intégrer les immeubles à l’écosystème local, s’inspirer des formes naturelles. L’architecte malaisien Ken Yeang, l’un des théoriciens de cette écoarchitecture, auteur de The Green Skyscraper (« Le gratte-ciel vert », non traduit, Prestel, 1999), a poussé cette réflexion très loin : selon lui, un immeuble doit être conçu dès l’origine comme un « système vivant construit », afin de pouvoir entrer « en symbiose » avec son environnement : sobre en énergie, recyclable, bioclimatique, l’habitat doit participer du cycle naturel, réintégrer la biosphère et dépolluer, tel un arbre colossal.

Pour bâtir cette cité aquatique, il faudra d’abord concevoir des grands caissons flottants de différents formats qui s’emboîteront jusqu’à former des îlots constructibles. Les premières unités doivent être mises en chantier cette année. Les commanditaires ont hâte de les tester : la pollution des grandes villes chinoises est telle que les autorités envisagent de construire rapidement à l’écart des zones atteintes. Sur l’eau, en face des cités enfumées. Demain, ces cités pourraient abriter une partie de la population littorale, désengorger les mégapoles, être économes en énergie, alléger la dégradation environnementale

Que répondent les architectes « bleus » à ces critiques et à ces risques d’une pollution aggravée ? Ils soulignent qu’ils ne veulent pas construire des îles artificielles, mais flottantes, qui n’altéreront pas les fonds marins. Et ils avancent un nouvel argument de poids : au XXIe siècle, l’humanité (9,6 milliards d’habitants attendus en 2050) va rencontrer de graves problèmes de terre arable, d’épuisement des stocks halieutiques et d’alimentation – toutes choses qui inquiètent beaucoup l’Organisation des Nations unies pour l’alimentation et l’agriculture (FAO). A Londres, pour les concepteurs de la Floating City, la cause est entendue : seule une future « colonisation » des mers permettra d’arrêter la conquête des terres par la ville. Ils écrivent : « La biologie terrestre a été soumise depuis longtemps à une exploitation si intensive que les terres encore inexploitées doivent être préservées de l’urbanisation. De nouvelles colonies maritimes devront être planifiées au XXIe siècle. »

C’est sur cette problématique de la disparition et de l’épuisement des sols, associée à une crise alimentaire, que les défenseurs de l’urbanisme marin rejoignent un autre volet de la « révolution bleue » : la croissance exponentielle de l’aquaculture mondiale depuis vingt ans. En 2008, selon un rapport de la FAO, l’aquaculture a fourni 46 % des poissons à l’échelle mondiale. Il s’agissait à 87 % de poissons d’eau douce, mais l’aquaculture marine est en progression constante, ainsi que l’algoculture et la conchyliculture (élevage des mollusques marins). Cela se comprend : la pèche industrielle menaçant d’épuiser les stocks de nombreux poissons, l’aquaculture apparaît comme une réponse viable pour nourrir les populations, même si elle rencontre de sérieux problèmes de gestion durable.

Or, les architectes bleus avancent que l’avenir de l’aquaculture maritime passera par l’édification de fermes et de bassins nourriciers à proximité des cités côtières. C’est l’idée qui est derrière un projet de l’agence DeltaSync, « Floating food cities will save the world » (« les villes alimentaires flottantes sauveront le monde »), développé par l’ingénieur Rutger de Graaf. Imaginant une nouvelle forme d’économie circulaire, il explique que la construction de récifs artificiels accueillant poissons et crustacés, de bassins d’aquaculture aquaponique recyclant les éléments nutritifs apportés par les déchets des villes flottantes, et d’îles agricoles permettra de nourrir les populations urbaines côtières. Selon lui, il suffirait que 1 % des mers soient consacrées à l’aquaculture pour nourrir l’humanité – le reste des eaux devant être sanctuarisé. Une étude de faisabilité accompagne ces projets

Les partisans de l’architecture « bleue » avancent enfin qu’elle devrait permettre d’éviter un des drames possibles du changement climatique : la submersion de nombreuses îles du fait de la montée des eaux. Le gouvernement des Maldives y croit, qui a lancé en 2010 un programme de constructions sur l’eau afin d’accueillir les populations menacées et de sauver le tourisme : des projets de villages amarrés mais aussi d’îlots de plaisance, d’hôtels et de golfs flottants sont à l’étude. Ces réalisations pionnières, encore très élitistes − « Les riches paient pour les prototypes qui serviront à tous », explique Koen Olthuis –, sont étudiées de près par les Etats insulaires d’Océanie, qui ont lancé en juillet 2014, lors du 45e Forum des îles du Pacifique, un appel de détresse aux pays industrialisés.

Ils ont rappelé que l’archipel de Kiribati, où vivent 110 000 personnes, risque de devenir inhabitable en 2030 – même si certains scientifiques assurent que les atolls vont s’élever avec les mers. Les autorités ont d’ores et déjà acquis 2 400 hectares dans les îles Fidji pour les reloger. Le président de la République des Kiribati, Anote Tong, a aussi évoqué la possibilité de construire une « île flottante » pour les futurs réfugiés climatiques. Or, deux projets de ce type existent dans les cartons des architectes bleus. Le premier, un ensemble de trois îlots végétalisés, agricoles, supportant une tour d’habitation géante, est étudié par le constructeur japonais Shimizu Corp.

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Thailand tests floating homes in region grappling with floods

By Alisa Tang
Thomson Reuters Foundation
March.2015

In this picture provided by Site-Specific Co Ltd, the 2.8 million baht ($86,000) amphibious house, designed and built by the architecture firm Site-Specific Co Ltd for Thailand’s National Housing Authority (NHA) rises up 85cm after architects and NHA staff fill a manmade test hole underneath the house with water during a trial run in Ban Sang village of Ayutthaya province September 7, 2013. REUTERS/Site-Specific Co Ltd/Handout via Reuters

AYUTTHAYA, Thailand (Thomson Reuters Foundation) – Nestled among hundreds of identical white and brown two-storey homes crammed in this neighborhood for factory workers is a house with a trick – one not immediately apparent from its green-painted drywall and grey shade panels.

Hidden under the house and its wraparound porch are steel pontoons filled with Styrofoam. These can lift the structure three meters off the ground if this area, two hours north of Bangkok, floods as it did in 2011 when two-thirds of the country was inundated, affecting a fifth of its 67 million people.

The 2.8 million baht ($86,000) amphibious house in Ban Sang village is one way architects, developers and governments around the world are brainstorming solutions as climate change brews storms, floods and rising sea levels that threaten communities in low-lying coastal cities.

“We can try to build walls to keep the water out, but that might not be a sustainable permanent solution,” said architect Chuta Sinthuphan of Site-Specific Co. Ltd, the firm that designed and built the house for Thailand’s National Housing Authority.

“It’s better not to fight nature, but to work with nature, and amphibious architecture is one answer,” said Chuta, who is organizing the first international conference on amphibious architecture in Bangkok in late August.

Asia is the region most affected by disasters, with 714,000 deaths from natural disasters between 2004 and 2013 – more than triple the previous decade – and economic losses topping $560 billion, according to the United Nations.

Some 2.1 billion people live in the region’s fast-growing cities and towns, and many of these urban areas are located in vulnerable low-lying coastal areas and river deltas, with the poorest and most marginalized communities often waterlogged year-round.

For Thailand, which endures annual floods during its monsoon season, the worsening flood risks became clear in 2011 as panicked Bangkok residents rushed to sandbag and build retaining walls to keep their homes from flooding.

Vast parts of the capital – which is normally protected from the seasonal floods – were hit, as were factories at enormous industrial estates in nearby provinces such as Ayutthaya. Damage and losses reached $50 billion, according to the World Bank.

And the situation is worsening. A 2013 World Bank-OECD study forecast average global flood losses multiplying from $6 billion per year in 2005 to $52 billion a year by 2050.

FLOATING HOUSE

In Thailand, as across the region, more and more construction projects are returning to using traditional structures to deal with floods, such as stilts and buildings on barges or rafts.

Bangkok is now taking bids for the construction of a 300-bed hospital for the elderly that will be built four meters above the ground, supported by a structure set on flood-prone land near shrimp and sea-salt farms in the city’s southernmost district on the Gulf of Thailand, said Supachai Tantikom, an advisor to the governor.

For Thailand’s National Housing Authority (NHA) – a state enterprise that focuses on low-income housing – the 2011 floods reshaped the agency’s goals, and led to experiments in coping with more extreme weather.

The amphibious house, built over a manmade hole that can be flooded, was completed and tested in September 2013. The home rose 85 cm (2.8 feet) as the large dugout space under the house was filled with water.

In August, construction is set to begin on another flood-resistant project – a 3 million baht ($93,000) floating one-storey house on a lake near Bangkok’s main international airport.

“Right now we’re testing this in order to understand the parameters. Who knows? Maybe in the future there might be even more flooding… and we would need to have permanent housing like this,” said Thepa Chansiri, director of the NHA’s department of research and development.

The 100 square meter (1,000 square foot) floating house will be anchored to the lakeshore, complete with electricity and flexible-pipe plumbing.

Like the amphibious house, the floating house is an experiment for the NHA to understand what construction materials work best and how fast such housing could be built in the event of floods and displacement.

FLOATING CITIES?

The projects in Thailand are a throwback to an era when Bangkok was known as the Venice of the East, with canals that crisscrossed the city serving as key transportation routes. At that time, most residents lived on water or land that was regularly inundated.

“One of the best projects I’ve seen to cope with climate-related disasters is Bangkok in 1850. The city was 90 percent on water – living on barges on water,” said Koen Olthuis, founder of Waterstudio, a Dutch architecture and urban planning firm.

“There was no flood risk, there was no damage. The water came, the houses moved up and down,” he said by telephone from the Netherlands.

Olthuis started Waterstudio in 2003 because he was frustrated that the Dutch were building on land in a flood-prone country surrounded by water, while people who lived in houseboats on the water in Amsterdam “never had to worry about flooding”.

His firm now trains people from around the world in techniques they can adapt for their countries. It balances high-end projects in Dubai and the Maldives with work in slums in countries such as Bangladesh, Uganda and Indonesia.

One common solution for vulnerable communities has been to relocate them to higher ground outside urban areas – but many people work in the city and do not want to move.

Olthuis says the solution is to expand cities onto the water.

Waterstudio has designed a shipping container that floats on a simple frame containing 15,000 plastic bottles. The structure can be used as a school, bakery or Internet cafe.

Waterstudio’s aim is to test these containers in Bangladesh slums, giving communities flood-safe floating public structures that would not take up land, interfere with municipal rules or threaten landowners who don’t want permanent new slums.

“Many cities worldwide have sold their land to developers… and now when we go to them, we say, ‘You don’t have land anymore, but you have water,’” Olthuis said. “If your community is affected by water, the safest place to be is on the water.”

Reporting by Alisa Tang, editing by Laurie Goering

Our Standards:The Thomson Reuters Trust Principles.

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Testing the Waters: Floating home development in Florida

By Amy Martinez
Florida Trend
February.2015

A 2013 U.S. Supreme Court ruling could lead to a first-of-its-kind floating home development in south Florida.
(Amy Martinez)

In 2005, Hurricane Wilma destroyed a pair of dilapidated marinas in North Bay Village where Fane Lozman, a former Marine pilot and software developer, kept a two-story floating home.
The Category 3 storm struck from the south, scattering splintered docks and other large debris into more than a dozen neighboring floating homes.
For years, Lozman had relished the camaraderie and convenience of living on Biscayne Bay, especially the easy access to deep-sea diving and fishing and his favorite Miami Beach restaurants. “Your speedboat was tied up right outside your front door. And you could enjoy the south Florida water lifestyle immediately and at any time,” he says.
After Lozman’s floating home, which had been docked at the north end of the marina community, emerged relatively unscathed, he quickly began looking for another place to anchor. In 2006, he had his home towed 70 miles north to Riviera Beach and rented a slip at a city-owned marina.
His new neighbors told him not to get too comfortable, however, because a planned, $2.4-billion marina redevelopment project soon would displace them. Lozman sued Riviera Beach to stop the project. And that led to another dispute, which eventually wound up before the U.S. Supreme Court.
In 2009, after failing to evict Lozman in state court, Riviera Beach went to federal court, seeking a lien for about $3,000 in dockage fees and nominal trespass damages.
The city argued that because Lozman’s floating home could move across water, it was a vessel under U. S. maritime law. A federal judge in Fort Lauderdale agreed, and the home was seized, sold at auction and destroyed by Riviera Beach, which cast the winning bid.
Lozman countered that his home was similar to an ordinary landbased house and should have been protected from seizure under state law. The home consisted of a 60-by- 12-foot plywood structure built on a floating platform — with no motor or steering — and could move only under tow.
Lozman’s appeal caught the Supreme Court’s eye. And in early 2013, it handed him a victory. Justice Stephen Breyer wrote in the majority opinion that because Lozman could not “easily escape liability by sailing away” and because he faced no “special sea dangers,” his home was not a vessel and not subject to seizure under maritime law. Lozman is still seeking compensation from Riviera Beach for his home’s destruction.
After the Supreme Court’s ruling, Kerri Barsh, a Greenberg Traurig attorney who helped argue Lozman’s case on appeal, contacted Netherlands-based Dutch Docklands, a developer of floating homes.
Founded in 2005 by architect Koen Olthuis and hotel developer Paul van de Camp, Dutch Docklands had designed hundreds of floating homes in Holland and was looking to expand to the United States. Barsh believed the high-court ruling created an opening for the company to pursue a first-of-its-kind floating home development in south Florida.
It meant, for example, that buyers could get a mortgage and homeowners insurance, though they’d also have to pay property taxes. The Coast Guard couldn’t enter their homes to inspect for life jackets and other safety measures — and “if a gardener or maid is injured on your property, you don’t have to comply with strict workers’ comp standards,” she says. “You also may be entitled to a homestead exemption.”
Dutch Docklands now is proposing a collection of multimilliondollar floating homes at a privately owned lake in North Miami Beach. Plans call for 29 man-made, private islands that are attached to the lake bottom with telescopic piles to guarantee stability.
Each island would cost an estimated $15 million and include a 7,000-sq.-ft. home, infinity pool, sandy beach and boat dockage, plus access to a 30th “amenity” island with clubhouse. The target market is celebrities and wealthy foreigners who want both privacy and proximity to downtown Miami, says Frank Behrens, a Miami-based executive vice president at Dutch Docklands.
“Buying your own island is a very complex process, and yet it’s a dream a lot of people aspire to,” he says. “Basically, what we’re offering is a way to realize that dream. Within two minutes, you can be on land and go to a Heat game or fancy restaurant.”
Historically, floating homes have not been widely embraced in Florida. A case in point is Key West’s Houseboat Row, which started in the 1950s as a playground for the rich, but in the 1970s deteriorated into floating shacks and live-aboards. In the 1990s, then-Mayor Dennis Wardlow repeatedly criticized Houseboat Row as an eyesore and environmental hazard. And by 2002, the community’s residents had been evicted and moved to a city-owned marina at Garrison Bight.
Today, the city marina has 35 floating homes and won’t accept any more. “We prefer to take in a registered marine vessel that’s Coast Guard certified,” says marina supervisor David Hawthorne. “Most marinas have moved out of it because of the liability, and there’s just more money in” short-term boat rentals.
To succeed in Florida, Dutch Docklands will have to change perceptions. The company promotes its brand of floating homes as a response to rising sea levels and climate change. And south Florida — as ground zero for sea level rise — could prove a receptive audience. Because of how they’re anchored, the floating homes move vertically with the tides, but not horizontally, enabling them to adapt to longterm climate changes and also hold steady in storms, Behrens says.
He hopes to begin construction next year at Maule Lake, a former limestone rock quarry with direct access to the Intracoastal Waterway. But his plans may be optimistic. The company recently filed for zoning approval and still faces questions about environmental impacts, the homes’ ability to withstand hurricanes and visual effects on the surrounding community.
“One of the big struggles we’ve had in this state is coming to grips with the fact that there’s a finite amount of land and water,” says Richard Grosso, a land-use and environmental law professor at Nova Southeastern University. “We tend to not recognize the importance of open space — the aesthetic and psychological value of it.”
Condominium towers — some pricier than others — surround Maule Lake. Behrens says local residents are understandably concerned about the project.
“If all of a sudden, a foreign developer comes and says, ‘Hey, we’re going to build private islands on this lake,’ I’d be upset, too,” he says. “But if you live in a $200,000 condo, and you get a $15-million private island on the lake in front of you, where a celebrity lives, you can imagine that the value of your real estate will go up.”
Even if all goes as planned for Dutch Docklands, it’s unlikely to spark copycat projects throughout Florida. Maule Lake presents “a pretty unique set of circumstances,” says Miami environmental lawyer Howard Nelson. At 174 acres, it’s big enough to accommodate a floating development without blocking boats — “and there’s very few bodies of water where the submerged land is privately owned,” says the Bilzin Sumberg attorney.
Meanwhile, Lozman has bought 29 acres of submerged land on the western shore of Singer Island in Palm Beach County. He says he’s talking with developers about building his own floating home community.
“I could see maybe 30 floating homes out there one day,” he says. “It would essentially duplicate the North Bay Village community that was destroyed in Wilma.”

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Portrait: Waterstudio.nl, The Netherlands

Archi-News, February 2015

Facing the city planning and climate changing challenges, the Dutch office Waterstudio.nl chooses to work principally towards flexible strategies and large scale floating architecture projects proposing sustainable solutions.

In the Netherlands, one quarter of the country being under sea level, the architects are considering the ways to rethink the built environment. Koen Olthuis (*1971) is one of them. Founder of Waterstudio, he studied architecture and industrial design at the Delft Technology University. As per his words, we treat our cities as if they were static and we don’t stop erecting fixed urban elements, which after 50 years become obsolete and useless. But the to-morrow’s city is dynamic, hybrid, flexible and environment friendly, a moving town, which reinvents itself constantly. The architect’s work is more precise in order to especially respond to the pressing needs of climatic changes. Koen Olthuis proposes to live on the water, with the water. The first town created in this spirit is under construction between The Hague and Rotterdam. Called « The New Water », this 1200 house urban development takes place in the polder zone, intentionally filled with water after a few centuries of artificial draining.
Strict rules limit the volume authorized above sea level. This constraint gives life to a rather sophisticated design and to interesting spatial solutions, particularly a naturally lighted basement, large glass surfaces, parts with wood and a white Corian® curved frame running along the façade. First one of the 6 buildings foreseen in this project, Citadel is also, with its 60 luxury apartments, the first floating building in Europe. Easy to reach from the side by a floating road, the building is composed of 180 modular elements, placed on concrete foundations. The norms are identical to those of a house on dry land. Another element of the New Water project’s first part: the Waterfront villa has a concrete base with a boathouse and a swimming pool. Three U-shaped volumes enable to optimize the viewpoints at each level. Corian® is used as the main covering material.
Waterstudio develops a revolutionary concept for the cruise ships terminal. A sculptural triangular floating construction (700 x 700 m) situated outside the bank, disposes of more than 160 000sqm of conference halls, cinemas, shopping areas, spas, restaurants, hotels, etc. The triangular ring raises at one place to create a smaller interior harbour. Covered with aluminium panels and partly with photovoltaic cells, the structure anchors itself to the seabed by cables with shock absorbers, enabling a vertical flexibility, whilst ensuring horizontal stability. Modern, light and transparent, the De Hoef villa shows in a concrete way that floating architecture has now reached the same level as its land counterpart. Realized with a steel frame, the construction is an amphibian structure, floating on water but surrounded by land on three sides. The choice of this type of structure results from the fact that « normal » houses are not allowed in this peat landscape.
With the project See Tree, Waterstudio proposes a new concept for the high-density urban green points. With many layers of trees, this floating structure, unattainable for man, uses the petrol offshore platforms’ technology. It would be the first 100% floating object designed and built for flora and fauna.

At the other end of the world, Koen Olthuis undertakes a huge project: design a floating town in the Maldives. The masterplan proposes a solution to the dramatic situation created by the rising sea level. These floating developments, especially, have a real positive impact on the poor communities living near the coast. The architect reminds that the most exposed cities are Mumbai, Dhaka and Calcutta because of their huge populations threatened by the water level increase. In these cities, millions of people live in dense slums along the water and are vulnerable to floods especially during the rainy season. “With the City Apps, based on standard maritime containers, we want to use the technical knowledge coming from our floating projects for the wealthy people.” They can be compared to Smartphone with applications adapted to different needs, such as a special programme for slums. In view of their flexibility and small size, the City Apps use the space available on water and are very convenient to be used as residences or schools, for instance.

The objective is to reach 10 000 containers in 5 years, rented in the whole world. “The importance given to slums has opened new opportunities and has put me in touch with many interesting and influential people who understand the necessity for the architects to use their influence and creativity to change the lives of millions of human beings, underlines also Koen Olthuis”.
His approach to improve the coastal towns throughout the world with these floating urban components is a real challenge. « It is just as if we had discovered a small part of the water potential to make the cities more resilient, sure and flexible. I believe that our projects and those of many architects, who use the floating technology as a tool, will open new norms for the cities ».

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Koen Olthuis, Hong Kong design week

By Today’s living
BODW
February.2015

The business of Design Week (BODW), organized by the Hong Kong Design Centre, has been a key event for the local design community since 2002. BODW 2014 saw the arrival of leading designers from Sweden and all over the world,, carrying with them invaluable insights from the fields of architecture, fashion, technology and culture. Today’s Living talked with six of the design heavyweights present at this year’s event, namely Anna Hessle, Erik Nissen Johanson, Koen Olthuis, Lisa Lindstrom, Thomas Eriksson and Marcus Engman. In this issue, we introduce you to three of these interior and architectural leaders, all of whom are masters of their industry.

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Long for a sea change? Buy a house boat

By Alina Dizik
BBC
September.28.2014

When Soren Terkelsen moved to a houseboat with his wife and two young children seven years ago, he wasn’t prepared for a front-row seat of Copenhagen’s winter storms.

“All of a sudden the ship turns into a steel thing that you cannot control,” said the 44-year-old. “We were completely new to this and had a lot of surprises.”

For Terkelsen, taking care of the M/S Arno, a 50-year-old boat that was refurbished into a family home, wasn’t immediately intuitive. In fact, there was much to learn about the new lifestyle.

The boat requires a new coat of paint with the rust scraped off every few years, the septic tank needs to be emptied regularly and there are mooring restrictions that dictate where he can keep the vessel.

Still, living close to the city without the chaos, while enjoying the serenity unique to waterside living—like watching geese and other water birds fly past — is hugely rewarding, he said.

“I really love it,” said Terkelsen, who recently started Copenhagen Boats, a boat-rental business.

For those who’ve long dreamed of living on the water, owning a houseboat is within reach. Many refurbished boats are on the market in waterfront cities including Seattle, San Francisco, Amsterdam, Stockholm and Copenhagen. And, new luxury communities are in various stages of development in Dubai, the Maldives and Miami. Houseboat prices can run from $200,000 into the millions, depending on the location and the level of luxury.

Architects say homes that float on the water can rise and fall with the tides, keeping buyers safe from flooding and rising water levels due to climate change. “It’s a unique lifestyle,” said Rick Miner, a Seattle-based real estate broker who specializes in floating homes and has lived in one for 23 years.

How to find it

After 25 years spent working in the hospitality industry in Vancouver, Canada, Ben de Vries knew he wanted to return to Holland and live in one of Amsterdam’s famous houseboats. But finding a boat wasn’t easy.

In cities like Amsterdam, licensed boats docked within city limits can be difficult to find because there are so few lots along the city’s waterways. After a long search, de Vries bought an old boat in 2001 for €120,000 ($92,850), which didn’t quite fit his idea of a dream houseboat because it was cramped and in need of an upgrade.

But, the old boat was well worth the price, he said, as the purchase included the valuable docking space license, or ligplaats, which in Amsterdam is sold together with the boat. Places to moor the boat in this Dutch city are fixed and cannot be changed to a different location, similar to purchased land. De Vries eventually purchased a new boat for €110,000 ($85,115) to put in the same space.

The hassle was worth it. While some houseboat communities on the city’s most popular canals can be loud, De Vries says he lives in a quieter part of the city and enjoys the diversity of his houseboat community. “They are usually interesting people that live on houseboats,” he said.

He also loves being close to nature. “I see big fish swimming around,” he said. “You’re more exposed to the elements.”

Due to limited docking space, competition for house boats is fierce in most markets, according to Koen Olthuis, founder of Waterstudio, an architecture firm in Deft, Holland that specializes on over-water projects.

Miner says that only six or seven boat properties per year are available for sale in Seattle and range from $700,000 to $1 million. By comparison, in Amsterdam, with an estimated 2,500 houseboats, there are more properties for sale and small older boats can sell for €200,000 ($154,750).

Finding a houseboat on your own can be difficult, so it is advisable to find a real-estate agent that specialises in houseboat sales. In the Maldives, for instance, Christie’s is selling 185 new floating villas, which start at $1 million and are in the first phase of completion, said Olthuis, who helped create the project.

Fees and maintenance

If you’re thinking of taking the plunge, there are some financial considerations to take into account.

The newest floating homes are built on a hollow concrete barge that can be towed to other locations but can’t be moved independently. But, because many floating homes and houseboats aren’t equipped with the engines, mechanics or navigation systems of boats, upkeep costs can be lower than a fully functioning water vessel of a similar size.

Monthly upkeep of your houseboat can cost from $200 to $600 for mooring fees and maintenance. Most owners pay monthly homeowner dues that cover water, sewer and dock maintenance. Those who own their docking spot, don’t pay a monthly mooring fee.

Houseboat owners are required to pay personal property taxes similar to home ownership on land. And, many houseboat communities also provide parking for homeowners as part of the monthly dues. But, in some areas, the saltwater can eat away at the floating home and require expensive upkeep well into the thousands of dollars, so budgeting for longer term, one-off or occasional expenses is also a good idea. When getting a mortgage, insurance in a must and is only slightly higher than homeowners insurance on land, mostly due to more possible weather damage. In the US, houseboat insurance averages about $1,500 annually.

Life on the water

If you think a houseboat will provide solitude, think again. Floating homes have their own neighbourhoods and provide a sense of community with other owners because they are rarely moved from one place to the next.

People “don’t realize how similar it is to normal housing,” said Olthuis, whose firm focuses entirely on overwater properties. “People still think it’s something futuristic.”

However, some of the comforts of home differ and require some adjustment. For one, bringing groceries or items back to the boat is often an acquired skill because you need to walk along a jetty. Odd jobs around your houseboat will also be different to those on land. A septic tank filled with used water needs to be properly emptied and cables that attach the boat to land must be checked frequently to prevent a boat coming loose during high winds.

Decorating is also a unique consideration. Some regular furniture can be an odd fit into the houseboat’s curved rooms, says Terkelsen, which means furnishing it could be more interesting — but more expensive — than a house on land. Some companies including the US-based Bradd and Hall specialize in furniture in marine settings.

How to finance it

Financing a home on the water is different than purchasing a home on land.

In the US, smaller banks located near houseboat communities such as those in the Northwest will help buyers get a mortgage, but most homes are bought for cash, said Miner. With a mortgage, most boat purchases require a 20% down payment, he said. Such mortgages require special inspections that can cost up to $800 and involve a dive survey of the outside part of the home, which is a cost covered by the buyer and should be factored into closing costs.

In Amsterdam, to close on sale, boats need to be examined in a shipyard outside of the water. Not all banks around the world offer houseboat mortgages. Instead, buyers may need to take out a secured loan, which is similar to a mortgage and gives more favourable terms because the borrower pledges collateral for the loan.

An added return

With so many curious travellers, one perk to owning a houseboat is that they are easy to rent out.

This year, Terkelsen and his family moved back on land to start renting out their Copenhagen houseboat online. Bookings are already filled for the next three months, providing a healthy income stream.

Renting out a room on his Amsterdam boat also helps De Vries offset the extra expense of living on the water, while allowing him to share his love of the water with travellers. Guests enjoy the novelty of booking a room at Ben’s Boat and Breakfastand being only 10 minutes away from the center of town, said De Vries who rents one of his bedroom suites for €95 ($123) per night.

“It’s a rewarding business,” he said.

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Water Architecture: A chat with Waterstudio and Koen Olthuis

By Enrique Sánchez-Rivera
La Isla

We were intensely captivated by Waterstudio after seeing them featured on National Geographic Magazine. Their incredible innovation skills and clear understanding about the future of architecture and our planet was obvious and ever so present in all of their plans and their current work. From a partially submersed ecological tower to floating islands in the shape of stars, Koen Olthuis and his team are shaping up the future for a post-antarctic ice meltdown era.

1. Can you tell us how Waterstudio got started and why?

When I was a young architect, I became fascinated by the structure of the Dutch landscape with its water and land. At that time, living on water was still limited to the well-known traditional houseboats. After two years of combined land and water projects, I started up Waterstudio, the first architecture firm in the world exclusively dedicated to living on water. I was a pioneer in a new market. To bring the market to maturity, the main focus

was to change the perception of the general public. Waterstudio began with an ambitious plan to develop innovative concepts in both technological and urban design fields. My conviction that living on water is essentially no different from living on land, just with a different foundation technique, spurred me on to develop types of housing with greater density and higher quality than the usual houseboats in a recreational countryside setting.

2. If you could define what you do in a sentence, what would it be?

We bring Architecture beyond the waterfront, creating new floating possibilities for growing cities World wide. And to add a second sentence: we have a lot of fun!

3. Where do you find inspiration for your designs? Floating structures and underwater urban environments are incredibly new to us so we are curious to know this.

I see architecture as products, since floating buildings are not fixed, their context can change and they are more or less independent from their environment.

May of our ideas are based on shapes and products from nature. I like architecure that looks simple and recognizable. So for instance the starfish design for the greenstar hotel in the Maldives is a design that every child can redraw ones they have seen it. I call this readable architecture.

4. How expensive do you think it will be to live on a floating structure vs. a land structure?

The price of a building on a floating foundation is comparable to a house on a fixed foundation, the exact price depends on the type of water, deep, shallow, waves, calm water etc.. , Making a floating building for calm water on a lake with less height difference is cheaper to construct than a building in the middle of the ocean.

One of the benefits of construction a floating building is that they don’t have to be constructed on their final location because you can move them afterwards. They can be constructed in a factory, weather doesn’t influence the building process, this makes it faster, easier and cheaper. Nowadays contractors are not used to constructing a floating foundation, when this type of foundation will be more standardized in future the construction of it will be even more cheaper.

5. How did the idea of the sea tree come along? Can you tell us about it? When will it be completed?

This is my favourite project.Our inspiration in regards to creating Sea Tree came from a project in Holland where ecologists challenged us to design a habitat for fauna which could not be disturbed by human beings. Water is, of course, a perfect way to keep people away. Other sources of inspiration were the shapes of floating oil storage structures in Norway and the shapes of land trees with a large crowns. Lastly, the concept was developed from park zones in urban areas. We divided these areas into sections and placed them vertically on top of each other. In the end, it has become a vertical hangout for wildlife! We are now in the middle of negotiations with an oil company to see if they will be the sponsor for the project. It will be a green advertisement of their outstanding offshore technology. They could show that from their knowledge also animals and local habitats could benefit. The sea tree will be built in an protected nursery and afterwards shipped out to its location on water in a city. This would bring an instant green upgrade!

6. Do you see yourselves also designing underwater environments at some point? Does that concept also align with your vision?

We already do this. We have a client in Curacao who wants an underwater room. So for him we design a projects in which we have windows under water. In that project we also design the shape of the floating body underwater so that coral and fishes can start use this structures for shelter and basis.

7. Obviously we like the idea of floating-everything, after all, we make bikinis! Which of your buildings or projects do you think would be best suited for a bikini fashion show?!

That should be our floating islands for the Maldives called Amillarah. The girls will enter the show via a small submarine through a hole in the ground of the island and then use the fantastic white artificial beach with real sand and palmtree as a catwalk while the audience gather around the islands on their yachts.

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Dutch solution to Miami’s rising seas? Floating islands

By Jenny Staletovich
Miami Herald
August.23.2014

Maule Lake has been many things over the years: industrial rock pit, aquatic racetrack, American Riviera. Now it is being pitched as something else entirely: a glitzy solution to South Florida’s rising seas.

In the land of boom and bust where no real estate proposition seems too outlandish — Opa-locka’s Ali Baba Boulevard connects to Aladdin Street in one of the more kitschy bids to sell swampland — a Dutch team wants to build Amillarah Private Islands, 29 lavish floating homes and an “amenity island” on about 38 acres of lake in the old North Miami Beach quarry connected to the Intracoastal Waterway just north of Haulover Inlet.

The villa flotilla, its creators say, would be sustainable and completely off the grid, tricked out to survive hurricanes, storm surge and any other water hazard mother nature might throw its way. Chic 6,000-square-foot, concrete-and-glass villas would come with pools, boathouses or docks, desalinization systems, solar and hydrogen-powered generators and optional beaches on their own 10,000-square-foot concrete and Styrofoam islands.

Asking price? About $12.5 million each.

If this sounds like a joke, think again. This, as the Dutch say, ain’t no grap.

“We’re serious people,” said Frank Behrens, vice president of Dutch Docklands, which has partnered with Koen Olthuis, one of Holland’s pioneering aqua-tects.

Still, it’s hard not to be skeptical.

“It’s both fantastic and fantastical,” said North Miami Beach City Planner Carlos Rivero, before adding, diplomatically, “This is quite a departure.”

Behrens won’t say exactly how much the company has invested so far but suggested it is enough to take the plan seriously.

“Look who I’m sitting next to,” he said during an interview, pointing to Greenberg Traurig shareholder attorney Kerri Barsh and Carlos Gimenez, a vice president at Balsera Communications and son of the county’s mayor, both hired to help ensure the project’s success. “This isn’t like, ‘Oh, let’s buy a lake and do a project and make money.’ It’s ‘Let’s buy a lake and show people what we’re capable of.’ ”

Together Dutch Docklands and Olthius’ firm, Waterstudio.NL, have completed between 800 and 1,000 floating houses in Holland along with 50 other projects including — if there were any question about their design chops —a floating prison near Amsterdam. The team is also constructing the first phase of a 185-villa floating resort in the Maldives — Behrens said 90 have already sold. Olthius also designed a snowflake-shaped floating hotel in Norway, floating mosques in the United Arab Emirates and even a floating greenhouse out of storage containers usually used by oil companies.

The team believes that by building an extreme example of a floating house in Miami, with every bell and whistle imaginable, it can open up a new American market to a way of building that has addressed rising waters in the Netherlands for a century.

“We chose Miami because we know this city is one of the most affected cities by sea-level rise,” Olthuis said by phone from Holland. “Once it’s done, you’ll see it’s a beautiful archipelago effect in the lake.”

So can you get a mortgage? Buy windstorm insurance? Declare a homestead exemption?

Yes, yes and yes, Barsh said. Practically speaking, the barge-like structures are considered houses, not boats, she said. A 2013 U.S. Supreme Court decision on a Riviera Beach houseboat that Barsh helped argue cleared the way by declaring floating homes real estate. After the victory, Barsh started talking to Behrens — they met through the Dutch Chamber of Commerce he founded in Miami in 2011 — about Dutch-style floating homes in the United States.

“Before, there was a lack of clarity,” Barsh said. The court decision “opened up an opportunity for this development to go forward.”

Barsh, who also represents rock-mining interests, says such projects could potentially provide a valuable way to reuse rock pits scattered throughout South Florida.

But what would it mean for the manatees that lumber through the saltwater lake, which is designated critical habitat?

Protections would remain in place, the team said. And the islands, with specially contoured undersides, could provide a habitat for sea life, Behrens said.

Still, making the project fit local laws could be tricky. In a preliminary review by the North Miami Beach city staff, Rivero raised questions as mundane as the need for parking. The city’s civil engineer wondered about stormwater runoff, among other things. And police say they would need a boat from the developer to patrol the islands. There’s one other thing: North Miami Beach’s rules for such developments so far apply only to land.

Luis Espinoza, spokesman for the county’s Division of Environmental Resources Management, said county officials would need to evaluate the islands for environmental impacts. And there’s the matter of taxes.

“If it’s a permanent-type fixture, then it will be assessed as property,” property appraiser spokesman Robert Rodriguez said.

Over the next 100 years, scientists predict climate change will alter water on a global scale. Seas will swell and coasts will shrink. Weather will become more extreme, with stronger hurricanes, harder rains and higher floods. Even routine tides will rise. And almost nowhere else will those effects likely be more dire than in South Florida, where beachfront highrises and marshy suburbs sit on soggy land kept dry by a complicated network of canals, culverts, pumps and other controls.

So solving the problems of coastal living in the 21st century could be lucrative.

“Here in Miami, it’s an artificial landscape, manipulated by mankind at a very high cost,” said Dale Morris, an economist with the Dutch Embassy in Washington, D.C., who is not connected to the Amillarah project. “So to think it can be maintained at no cost is nuts. I’m an economist. Nothing is free in this world.”

The floating islands, he pointed out, do nothing to solve larger climate problems for cities in South Florida, where flooding now occurs with normal high tides in Miami Beach.

Florida, like Holland, will have to tackle gradual sea rise in addition to event-related flooding like hurricane storm surges, Dutch landscape architect Steven Slabbers said at a recent workshop on resilient design in Miami.

“It’s an inexorable, decade-by-decade phenomenon,” he said.

Considering other Dutch designs — protective dunes tunneled out to hold parking, parks that become ponds and highways that float — a rock-pit-turned-floating-housing by using drilling rig technology might not seem so farfetched.

In recent months, the last new project on Maule Lake, Marina Palms, has shown that demand for lakefront property with Intracoastal access is high. Condos in the first of two buildings, which got the glam treatment this year on Bravo’s Million Dollar Listing Miami, sold out. But Maule Lake has not always been a twinkling star in the real estate firmament. It began life as a rock pit, when E.P. Maule moved from Palm Beach in 1913. Maule Industries would become the state’s largest cement manufacturing plant before falling into bankruptcy in the 1970s after it was purchased by Joe Ferre, whose son, former Miami Mayor Maurice Ferre, managed the company.

“That area was rich in rock pits, quarries and concrete manufacturing,” explained historian Paul George, who said the rock pits pocked the largely industrial area well into the 1960s.

The porous limestone mines fill with water from the area’s high water table. The new lakes provided even more waterfront property to an area already rich with water views, creating a developer’s dream — and possibly an environmentalist’s nightmare.

In addition to worries about marine life, building on the lake may raise concerns about water quality and potential effects on the nearby Biscayne Bay aquatic preserve and the Oleta River, another protected ecosystem. There might also be a question of encroaching on some of the area’s rare open space.

“We have a history in South Florida of viewing open spaces as a pallet for more product to be built on,” said Richard Grosso, a Nova Southeastern University law professor and director of the Environmental and Land Use Law Clinic. “Florida’s always been a place where we’ve suspended the laws of nature and physics and people haven’t always taken into account that there’s a finite amount of space.”

Gimenez, the public relations executive who is also a land use attorney, said the Dutch team has already met with the U.S. Army Corps of Engineers about concerns. The team also plans to meet with neighbors. And while nothing has officially been submitted, he said no one has raised objections. The 7- to 13-foot-deep lake, he pointed out, is too deep to harbor much marine life or sea grass.

Gimenez also said floating islands are better than the alternative: filling the lake and building highrises. Once mined, rock pits are sometimes refilled with construction and demolition debris. Developers in Hallandale Beach, for example, are filling a 45-acre lake with debris to build an office park. Rivero, the planner, said a North Miami Beach ordinance prohibits the lake from being filled, although property trustee Raymond Gaylord Williams, who had the property listed with a local Realtor for $19.5 million, could challenge that.

But getting a variance from a county ordinance regulating waterways could be a feat, since so few are granted, said land use and environmental attorney Howard Nelson.

“Let’s face it, [what developer] wouldn’t rather replace a houseboat with a houseboat office,” he said. “All of a sudden you don’t have the bay anymore. You just have dock space after dock space after dock space with offices.”

Behrens, a former banker who grew up in Aruba and was CEO of a Miami-based Dutch distillery, said the team has been meeting with various regulatory agencies to size up the obstacles since 2013 and will resolve issues as they come up. They hope to have permits completed within the next year and a half, he said.

“It’s a step-by-step approach,” he said. “But we’re Dutch. …We know how to stay and how to make success.”

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Amillarah Now affiliate of Christie’s

Amillarah private islands is now officially affiliate of Christie’s International Real Estate

Water Architect Koen Olthuis on How to Embrace Rising Sea Levels

Inhabitat, Bridgette Meinhold, July 2014

Sea levels are rising, floods are prevalent, and cities are at greater risk than ever due to climate change. Now that we’ve accepted these facts, it’s time to design and build more resilient structures. Koen Olthuis, one of the most forward-thinking and innovative architects out there, has a solution for rising sea levels. His solution: Embrace the water by incorporating it into our cities; creating resilient buildings and infrastructure that can handle extreme flooding, heavy rains, and higher water. Olthuis and his team at Waterstudio.nl have been showing coastal communities the benefits of building on the water. With countries like the Maldives and Kiribati having to build oceanside or move in order to escape rising sea levels, New York learning to battle storm surges, and Jakarta dealing with massive flooding, embracing water may be our only option for survival. We chatted with Olthuis about how coastal cities can become more resilient in the face of change—read on for our interview!

Despite his busy travel schedule, Olthuis had a chance to answer our questions with a great amount of detail and thought. Not only is Olthuis a leader in designing floating architecture, he’s the most-interviewed architect on Inhabitat. We think very highly of his work and ideas, and we think you’ll agree after reading through his thoughtful answers about the pressing issue of climate change. Don’t worry, it’s not all gloom and doom though—Olthuis proposes a future full of hope and promise!

Inhabitat: What does climate change mean for cities on the coast, and how serious is a sea level rise of 1 meter?

Koen: I think that climate change is a serious problem for these cities because most of them have been built upon the wrong parameters. For centuries, sea levels and climate have been relatively stable, which has brought us urban plans and built environments that are too static—like a one-trick pony for one certain set of conditions. With the arrival of uncertainty in , we have to rethink our coastal cities.

The threat that climate change brings is not just the physical threat of floods and drowning, but also the financial impact of destroyed property and businesses. Through the last century, waterfront development has increased in value as well as assets. Flood threats will put pressure on available dry space and reset the parameters for which parts of a city are desirable, and which are dangerous.

The effect of a one-meter sea level rise (without any adjustment to coastal cities as they stand today) would completely reset maps and financial stability in many of the world’s biggest waterfronts. New York, Miami, and Guangzhou would lose an important part of their real estate to the water. Countries like Bangladesh and the Philippines would have to give up lots of land. In the Netherlands, many of the water defense systems that protect the country under sea level will no longer be safe.

The question of how serious a one-meter sea level rise would be cannot be answered without placing this question in a certain timeframe. Although cities may appear static, they’re in constant change. The lifespan of urban components like infrastructure, normal buildings, and water defense measurements isn’t more than 50-100 years. This means that if the change occurs within the next 50-100 years, cities have time to grow into components designed upon the new parameters. If the rise occurs faster, cities won’t have time to adapt naturally and problems will occur. The problem is that because sea level rise is quite slow, governments find it hard to deal with a long timeframe when short-term strategies will lead to immediate benefits.

Inhabitat: What do coastal cities need to be thinking about and planning for in order to prepare for the inundation of water?

Koen: First, they have to design plans with flexibility—not solely for today’s conditions. Second, they might be better off embracing the water instead of fighting it, seeing urban water as a chance to upgrade our cities rather than a side effect.

I think that a resilient city isn’t one that prepares for the water to come, but one that allows it to expand. By letting in water and making it part of the city, rising levels or storm conditions will only mean working with a bit more water instead of the big shock that comes when conditions go from dry to flooded.

Regarding planning, coastal cities should focus on which areas should be kept absolutely dry, which can be changed from dry to wet, and which existing waters can be used for expansion. The future of resilient coastal cities is on the water, and metropolises like London, Miami, Tokyo, and Jakarta will expand their territory by 5 to 10 percent on urban waters in the next 25 years.

Inhabitat: Can you give us examples of any cities making promising strides to become more resilient?

Koen: Many are slowly taking defensive measures to become more resilient, but there is one that seems to use a highly innovative path: Jakarta. This capital of 10 million is suffering not only from climate change, but also from urbanization. The soil is sinking at a speed of 15 centimeters per year, which raises flood risks and effects, and it’s getting polluted with saltwater, which has a huge effect on fresh water reserves. Instead of building only higher water defense systems like dikes, which wouldn’t solve the saltwater problem, they’ve chosen to embrace more innovative solutions provided by Dutch engineers and urban planners. The solution focuses on closing Jakarta bay with a dike, turning it into one big 100 km2 wet polder; a size needed to provide enough storage area for extreme weather conditions.

On this dam, a city of a million people will be built facing the old waterfront of Jakarta on one side and the ocean on the other. For architects focusing on floating architecture, this kind of artificial large-scale wet polder provides a big opportunity: in order to keep the storage as big as 100 km2 you cannot build in the water, but floating structures have no effect on storage capacity. Jakarta can become one of the most resilient coastal cities of Asia and still make money from these measures—fighting water with water by adding the storage polder.

Inhabitat: If you were put in charge of making, say New York City, resilient to flooding and climate change, what strategies would you implement?

Koen: New York is one of the most iconic cities in the world, and Manhattan is the benchmark for high-density urban developments, but this city has also evolved to accommodate the surge for space. The enormous land expansion over the river beginning in the 17th century provided the city with new space. The elevator facilitated building into the air, and the metro system took advantage of space beneath the city. Without any of these innovations, Manhattan would look completely different. The lesson here is that standing still doesn’t always benefit cities, and innovations (daunting though they may appear) can bring new prosperity.

The biggest problem that New York will have to face isn’t a steady one-meter sea level rise—because that can be overcome with a meter-high levee—but the effects of extreme weather. Storm conditions like Hurricane Sandy will raise water a few meters and yield heavy rainfall that cannot be transported to the river, since the river itself will rise to record levels. To keep the subway system dry in normal conditions, huge amounts of water have to be pumped out; any additional water could make the system flood.

New Yorkers haven’t embraced the waterfront as much other coastal cities. The view inside is more important than outside and the most valuable real estate can be found around Central Park. [There are] no nice boulevards like in the south of France; nice beaches or green habitats can be found at their manmade border between land and water.

Having said this, I would bring the strategy of fighting water with water to New York and start wetting up the city. If we raise the level of the water ourselves by a few meters, it won’t be any problem when nature does it. To raise the level of the river and still use it as such is impossible, but there’s another Dutch solution that could work. In Holland, existing polders are surrounded by artificial canals. The water in these canals is a few meters higher than the polder waters. They aren’t dug into the landscape, but put on top of the landscape with a dike on both sides to keep the water in. Water from the polder is pumped into the canal and then transported to the rivers or the sea. The canals can be artificially controlled, providing a kind of buffer, and can also be used for transport, and waterside houses. I’d like to create a necklace of small, connected artificial lakes around Manhattan; a system much like an extra canal with a higher water level than the surrounding rivers. This canal would be divided into sections that could be closed separately.

This new zone will take the place of the existing harbor quay—the river width wouldn’t be affected, but the result would be like a set of airbags around the city. In case of high tide, these cells would serve as storage polders that could release water when the storm had passed. These cells would change the edge of Manhattan: the water cells would look like small lakes, and new settlements could be built on the levees dividing them from the river. These lakes would all be connected, and they’d only be closed off from each other during storm conditions, like compartments in large cruise ships.

The artificial lakes would fill the space now used by the river docks, and have a flexible water level that would provide an enormous storage zone, providing safety encroaching seawater. As I imagine, there would be as many as 40-50 of these lakes, each as long as 4-6 blocks. Lakes for leisure, for green floating communities, lakes with harbors—the greener the better.

Inhabitat: With countries like the Maldives and Kiribati losing their land to rising sea levels, how do they respond and provide for their citizens? Buy property elsewhere or construct floating cities? Are there estimates on how much it would cost to construct floating countries?

Koen: The Maldives and Kiribati are both series of small islands in the middle of the ocean, which will be highly affected by any sea level rise. Without enough dry land available, these countries have to make the choice to become climate refugees or adopt floating technologies and become climate innovators.

In the Maldives, Waterstudio has designed floating island resorts and a golf course for developer Dutch Docklands. They are building a joint venture with the government of the Maldives, both as a tool to increase new possibilities for tourism, and to reinforce society with long-term floating developments. Floating islands with high-density affordable housing could be added to the existing islands to provide space and safety. Floating developments are scar-less and mustn’t have any impact on marine environment during or after their lifespan.

This could lead to floating countries, keeping in mind that the Maldives has 300,000 inhabitants. The cost of these floating islands is comparable with dredging islands, only that dredging destroys sea life and coral reefs. If I must make a reasonable guess I would say around $25,000 per person, so for a city of 20,000 people it would cost 500 million dollars. This might sound like a lot, but it’s quite reasonable compared to evacuating a nation.

Inhabitat: How has your work changed over the years in response to the pressing needs of climate change?

Koen: The possibility of improving coastal cities worldwide with the implementation of floating urban components is just so challenging. It feels like we have only just discovered a small part of the potential that water could bring in making cities more resilient, safe, and flexible. I believe that projects like these will set new benchmarks for cities that would otherwise be in trouble because of climate change.

Our research seeks to change perception and dogmatic rules that traditional planners from the static era have put on us. I think that just in the last two years, iconic designs like the floating cruise terminal have developed an extra dimension—they’re part of a bigger vision that looks beyond iconic architecture to the economical impact it could bring.

My work has gone from designing for rich individuals to designing for the poor. We now design strategies for cities that have to adjust their planning approach because of shifting conditions due to climate change. The focus on slums has opened a whole new window of opportunity and has brought me in contact with many people who believe architects must use their influence and creativity to make a change for millions instead of only the happy few.

Inhabitat: Tell us briefly about your latest project, City Apps, and how it can help cities deal with climate change.

Koen: Miami and New York are the cities most threatened by sea level rise in terms of exposed real estate, but the populations most threatened by sea level rise would be in Mumbai, Dhaka, and Calcutta. In these cities, millions live in dense slums close to water. In fact, one billion people worldwide are living in slums, and half of them can be classified as wet slums because of their relation to the water. People living in these areas are terribly vulnerable to flood danger. Efforts to help these cities should not focus on protecting the built environment, but on protecting essential functions during and immediately after floods. Slums can be helped by upgrading programs to improve life conditions for 100 million people before 2020, as stated in the 2003 UN habitat millennium goal.

Programs in wet slums are not generally upgraded, because investing in them is a risky business, as floods could potentially destroy any functions built in areas close to the water. We want to use our technical knowledge to provide floating functions on water for these wet slums.

Just as you can download apps on your smartphone according to your changing needs, you can adjust functionality in a slum by adding functions with City Apps. These are floating developments based on standard sea-freight containers, and because of their flexibility and small size, they are suitable for installing and upgrading sanitation, housing, and communication.

Inhabitat: What advances in technology, design, or materials have helped push your architecture forward?

Koen: In Holland, we have always been close to maritime technology. It is very exciting to take these technologies that are meant for things like offshore oil industries and use them to create a floating habitat for animals, birds and underwater creatures like the Sea Tree does.

I think the Internet and 3D visualization tools have really pushed my architecture forward because in an industry as young as floating architecture, it is only the power of visualization that can show the impact of floating developments for the city of tomorrow. The fact that we can spread our ideas around the world and get feedback, response, and help because of the digital revolution is unbelievable. If I would have started twenty years ago I probably wouldn’t have reached more than half of Holland, and Holland isn’t that big.

My designs are what we call “readable architecture”—product-like solutions that ask for simple and clear details. Not every material is suitable for that, and over the last three years we discovered sustainable composites that suit the architectural expression I want, and are ideal for projects in salty environments that require low maintenance.

But the most important advantage in technology is logistics. The fact that we now can produce our floating houses and developments in different countries and assemble them on the water without affecting the environment makes it possible for us to rethink economical models for large-scale production.

Inhabitat: What are you most excited about right now in this field?

Koen: I am most excited about how global mobile assets will enable cities in developing countries to leapfrog to higher prosperity. These assets are large-scale floating developments that are being invested in by very rich countries like Qatar, Saudi Arabia, or Norway. These countries have so much money to invest that they cannot spend it all in their own country. Instead of investing only in wealthy world capitals, they’ll invest in flexible real estate, which can be leased to coastal cities.

It’ll start with functions like floating hotels and stadiums for cities that want to organize the Olympic Games but who cannot afford the investment. But it will rapidly evolve into an industry where cities that have been hit by climate change-related disasters can lease an entire set of functions like energy plants, hospitals, schools, and sanitation. Just like we do with our Floating City Apps for wet slums, there will be large-scale solutions to instantly upgrade cities and help communities recover. I see floating harbors and even small floating airports that’ll provide instant infrastructure to cities recovering from natural disasters.

The enormous financial capacity of these countries enables them to build global mobile assets up front on stock. So, imagine a safe floating location somewhere in Asia composed of completely functional urban components ready to be towed to any disaster area that appears. All the technology and money is already available—it’s only a matter of changing perception before floating developments are an essential part of the climate change reality that’s waiting for us. I say that not as a negative sentiment, because I believe that change will lead to innovation that will bring prosperity. The future is wet, the future is good!

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