Archive for the ‘CONSTRUCTION’ Category

BY MEG CALKINS, FASLA

New technologies can reduce the environmental footprint of the most-used construction material.

This week, LAM is joining more than 250 media outlets for Covering Climate Now, flooding the zone, as it were, with climate coverage in the run-up to the United Nations Climate Action Summit on September 23. Landscape and landscape architecture are deeply implicated in the future of climate progress, or a lack of it. Over the past decade, LAM has dug into climate issues of landscape in numerous dimensions, mapping the big resource picture as well as local attempts to fend off increasingly apparent hazards of global warming—from the procurement of materials to the integrity of the food supply chain. Each day this week we’ll bring you excellent stories from recent years that follow landscape architects acting and thinking about climate change and the landscape.

FROM THE JULY 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

 

Concrete in the 21st century promises to be a more sustainable material, and given the nine billion metric tons used globally each year, it must be. Portland cement, the binding agent in ordinary concrete, has a very high carbon footprint, resulting in just under one ton of carbon dioxide (CO2) released for every ton of cement produced. With 4.2 billion metric tons of the binder used each year worldwide, cement production is responsible for nearly 8 percent of total global carbon emissions. The high lime content of ordinary portland cement contributes about two-thirds of cement’s CO2 impact through the process of limestone calcination. The other one-third of CO2 released is from combustion of fossil fuels.

Technologies to improve the carbon footprint of concrete are currently in the early stages of development, but some, including carbon sequestration in concrete and substantial reductions of cement using energetically modified cement, are now commercially available. Concrete surface products for paving and walls to scrub air pollution, as well as new self-healing concrete products, are also worth investigating. We have heard about some of these innovations for a decade or more in the research community, but many are finally being brought to market—some more quickly than others. Europe is ahead of the United States in the adoption of these technologies, largely because of more rigorous clean air and carbon reduction initiatives.

New technologies in any field can take a long time to move from the laboratory to the marketplace, but (more…)

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BY ANDREW LAVALLEE, FASLA

Warranties on plantings often seem reasonable. Until they aren’t.

FROM THE FEBRUARY 2019 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

 

Most landscape architects are familiar with specifications about plant warranties. We often apply them without much thought because many consider it to be an industry standard practice. A typical plant warranty, usually lasting one or two years, requires the contractor to replace plantings that have died or appear to show unsatisfactory growth. Standard specification language often seems reasonable and enforceable. Until it isn’t—especially a few months after you thought the job was complete, or worse, after the end of the stated warranty period when the client calls upset that some of the plants are looking bad or are outright dead. Now comes the hard part. Whose responsibility is it if plants don’t succeed? Aren’t the dead or dying plants supposed to be covered by the warranty? If not, what was the warranty actually supposed to cover? These are all good questions that are symptomatic of a larger problem in the landscape industry. (more…)

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It’s the first of February, which means the latest issue of LAM is here! You’ll find these stories inside:

FOREGROUND

Changes Ferguson Can See (Planning)
In Ferguson, Missouri, the Great Streets plan for West Florissant Avenue is revived,
this time with more community participation.

Life Insurance for Plants (Materials)
Who’s responsible when a plant fails?

FEATURES

ICEd Out
The U.S. government does not classify landscape architecture as a STEM topic. That is bad news for foreign students seeking visas to study here—and for the profession.

Live and Learn
Artificial intelligence may well revolutionize landscape architecture. At least
that’s what the robots tell us.

The Huntress
Hunting her meat, growing her vegetables, and designing for meaning: Christie Green, ASLA, has chosen the wild life.

All this plus the regular Now and Goods columns. The full table of contents for February can be found here.

As always, you can buy this issue of Landscape Architecture Magazine at more than 700 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.

Keep an eye out here on the blog, on the LAM Facebook page, and on our Twitter feed (@landarchmag), as we’ll be posting February articles as the month rolls out.

Credits: “The Huntress,” Gabriella Marks; “Live and Learn,” XL Lab/SWA Group; “Changes Ferguson Can See,” SWT Design; “Life Insurance for Plants,” Cristina Cordero, ASLA, SiteWorks.

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BY LISA OWENS VIANI

Beavers become partners in restoration.

FROM THE JANUARY 2019 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

 

As public support for trapping has waned, beavers are making a comeback in urban waterways around the country. In Seattle, they are now said to be found in every suitable stream and water body, and some project designers now see them as partners in wetland restoration rather than nuisances. They say the benefits beavers bring to an ecosystem outweigh the challenges, and point out that working with them is far less expensive—and more humane—than trapping.

“Beavers construct wetlands that hold back and store water, allowing for groundwater recharge and pollution sequestration, and increasing biodiversity,” says Ben Dittbrenner, the aquatic ecologist and executive director of Beavers Northwest. “We do the same thing for hundreds of thousands of dollars, but they do it for free.” This past October, (more…)

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BY HANIYA RAE

Technology helps shape what hardscapes can be.

FROM THE DECEMBER 2018 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

Courtney Goode was working on a project in Houston when Hurricane Harvey hit. Buffalo Bayou, one of the slow-moving rivers that Houston relies upon to hold stormwater, flooded, and the waters would end up spilling out over the city’s aging infrastructure and impermeable surfaces, exacerbating the problem.

“My heart was in my throat,” Goode says. “We had been working on these super-detailed axonometric drawings of all angles of the city—we knew the city like the back of our eyelids. It was a total shock to see the bayous obliterated and murky, debris-filled water covering the walkways, roads, and even ground floors of the buildings near the bayou. The flood just engulfed everything we had been designing.”

For Goode, a landscape designer in Sasaki’s Urban Studio and a Fabrication Studio coordinator, the disaster afforded her a very real account of how the city managed stormwater and led her to think more about how low-impact development can divert stormwater from streets during flooding. She describes a scenario in which a city like Houston could divert some of the excess water by excavating 40-foot-deep gravel dry wells (the size of a typical four-story parking garage) topped off with permeable pavers that could hold excess rainwater until it’s able to seep back into the ground. (more…)

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REVIEWED BY JUSTIN PARSCHER 

FROM THE NOVEMBER 2018 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

 

In their continual search for respect, recognition, and equal pay, landscape architects find themselves in a quandary. On one hand, they understand that credit attaches itself to authors, masters with distinct visions and styles, and are forever writing letters to the editor to assert that the city didn’t do it—the landscape architect did. They celebrate acting as project leads, not only because it validates their way of working, but because the project lead can safely be given final credit. However, having toiled so long in subsidiary roles, landscape architects are also mindful of the networks of expertise that actually form ambitious designs, particularly in the public realm. A chain of public officials, architects, structural and civil engineers, ecologists, lighting designers, and community members all contribute to the shape of the place, which is naturally also conditioned by social and environmental realities on the ground.

The urban historian Alison Isenberg’s Designing San Francisco is, among its many other virtues, a vital text for helping landscape architects think through this dilemma. Isenberg’s book focuses on (more…)

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It’s the first of November, which means the latest issue of LAM is here! You’ll find these stories inside:

FOREGROUND

Lighting from the Inside Out (Lighting)
With the rising popularity of outdoor living comes a shining new crop of luminaires.

The Last Ash Standing (Plants)
The emerald ash borer beetle isn’t too fond of boring into the blue ash. If scientists can find out why, they may be able to save more trees.

Timing Is Everything (Construction)
Landscape installation should be driven by weather and nature, not financial models—but climate change is making best planting times unpredictable.

FEATURES

The River Beneath the River
After decades of neglect, the Anacostia River— Washington, D.C.’s lesser-known waterway—is poised at the edge of a hard-won environmental recovery. But where will it flow from there?

Upstream D.C.
Upland from Washington, D.C.’s two rivers, the city is planning major investments
in rain-soaking infrastructure.

Found in Translation
In Seattle, MIG | SvR and Turenscape’s Hing Hay Park provides a place to gather—with a
lively nod toward the Asian Pacific American experience.

All this plus the regular Now and Goods columns. The full table of contents for November can be found here.

As always, you can buy this issue of Landscape Architecture Magazine at more than 700 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.

Keep an eye out here on the blog, on the LAM Facebook page, and on our Twitter feed (@landarchmag), as we’ll be posting November articles as the month rolls out.

Credits: “Found in Translation,” Miranda Estes Photography; “The River Beneath the River,” Krista Schlyer; “Upstream DC,” Rhodeside & Harwell; “The Last Ash Standing,” Christopher Asaro, Virginia Department of Forestry, Bugwood.org; “Lighting from the Inside Out,” Courtesy Rondo; “Timing Is Everything,” Siteworks. 

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