Archinect - News

NPR on sponge cities, Kongjian Yu, and the future of flood mitigation

2023-10-10T13:46:00-04:00

Almost all of China's medium and large cities are now susceptible to floods. And [Kongjian] Yu says 60% of them experience flooding every year. Extreme weather from climate change is exacerbating the problem. So Yu has been evangelizing a solution he calls "sponge cities." That is, urban landscapes that are softer and purposely designed to absorb more water. Gareth Doherty, an associate professor of landscape architecture at Harvard University, says the concept is revolutionary.

The contributions of Turenscape founder Kongjian Yu to the development of the so-called “Sponge City” concept date to the mid-90s, stemming from a near-death experience in his childhood home of Jinhua. He says that by the end of the decade, roughly 80% of Chinese cities will now be adequately equipped by the measures. However, just under 10% of the country's mid- to large-sized cities had any plans to implement the concept by the start of the year, according to Reuters.

The need for better stormwater strategies has since been proven in New York City and other low-lying American metros, too, with $2.6 billion worth of funding specifically included in the 2021 Federal Bipartisan Infrastructure Bill to combat the problem. Copenhagen is seen as a world leader in the concept after experiencing a tumultuous 2011 cloudburst that led to a two-part system of expanded sewers and over 300 surface catchment projects.

Still, Yu says the reliance on concrete and technological solutions remains a...

Snøhetta and Asak Miljøstein create hexagonal pavement system to aid water management

2023-04-04T11:14:00-04:00

Snøhetta has collaborated with Norwegian manufacturer Asak Miljøstein on the design of an outdoor surface to aid water management. Named Asak Flyt, the permeable concrete paver system consists of three hexagonal interlocking unit types that can be combined to “provide landscape architects with another powerful tool for nature-based water management.”

Image credit: HISM, courtesy of Snøhetta

The varying sizes of tiles in the Flyt system create different interlocking spaces between each stone, allowing for greater control over the extent of permeability through the system. The team estimates that their system allows for up to 28% permeability per square meter of water.

Diagram credit: Snøhetta

The varying spaces between the tiles also create what the team calls a “visually exciting expression,” with the intention that the system becomes a design feature in its own right alongside its water management functions.

Diagram credit: Snøhetta

“Permeable surfaces are part of the increasingly nee...

Watershed moments: Derek Hoeferlin on managing 21st-century waterways

2021-06-14T14:38:00-04:00

From headwaters near Salem, Missouri, the Meramec River snakes 218 free-flowing miles, through 14 counties and scores of towns, skirting St. Louis before emptying into the mighty Mississippi.

Derek Hoeferlin grew up outside St. Louis, on a wooded hill close to the Meramec. As he commuted to school along Interstate 44, he’d cross the river and its sprawling floodplain twice or more each day.

“It’s always mesmerized me,” Hoeferlin recalls. “Something about its meandering made me daydream. Rivers don’t give a damn about north or south, east or west — or interstates for that matter. Water flows where water wants to flow.”

Today Hoeferlin is a licensed architect and chair of both landscape architecture and urban design programs in the Sam Fox School of Design & Visual Arts. In many ways, rivers have become his life’s work. But the daydreams are tempered by a growing sense of urgency.

“Too often, architects are responding to emergencies,” he adds. “It’s triage work. But we need to be m...

Case studies in water management from Los Angeles, the Great Lakes, and NYC

2015-04-13T14:41:00-04:00

The issue of water supply in the context of climate change was the topic for the recent 5KL: Water symposium, organized by The Architectural League and The Cooper Union Institute for Sustainable Design. Twelve experts in water resource design and management — from architects to geographers to former government officials — addressed the carbon intensity of providing a clean and adequate water supply and how design and planning can contribute to that goal.

How to Think Like the Dutch in a Post-Sandy World

2014-04-11T21:12:00-04:00

Dutch water-management experts have done such a good job of protecting their country that they rarely get to practice with water crises — whereas America was facing something monumental that as a culture it didn’t yet grasp. When Donovan arrived back in the U.S., he opened an email from Ovink that said, in effect, “I hope this isn’t too forward, but could I come work with you?”