The American Society of Landscape Architects (ASLA) has joined We Are Still In, a national coalition of 3,500 states, cities, companies, and organizations that remain committed to achieving US greenhouse gas emission reduction targets outlined by the Obama administration as part of the 2015 Paris climate agreement.
Nancy C. Somerville, Hon. ASLA, SITES AP, ASLA’s executive vice president and CEO, will attend the We Are Still In Forum in San Francisco on September 12, as part of the Global Climate Action Summit, the first-ever climate summit designed exclusively for leaders from the private sector and local government to highlight meaningful solutions to climate change and raise the bar for action.
ASLA leadership has identified climate change as a strategic focus in recognition of the threat it poses to people and the planet. Landscape architects play a major role in addressing climate and resilience issues, both through their work and through national and local advocacy. They plan and design “smart growth” communities; create low-carbon, safe, and active transportation systems; use green infrastructure to improve water quality and reduce flooding; and increase community health and resilience by designing and planning sites, communities, and regional strategies in concert with natural systems.
“By joining together, we strengthen our ability to take action,” says Somerville. “ASLA’s participation in We Are Still In enables us to reinforce the urgent need to build healthy, thriving communities through evidence-based design and planning and to help protect them from the impacts of climate change.”
ASLA is one of 34 signatories in We Are Still In’s cultural organization category. Others in this category include the American Public Gardens Association; California Academy of Sciences, host of the event; The Field Museum in Chicago; and the Phipps Conservatory, which has the first pilot project to have received the maximum four stars from Sustainable Sites Initiative™ (SITES®) for its Center for Sustainable Landscapes.
SITES® – describes the latest information about SITES®, a set of comprehensive, voluntary guidelines together with a rating system that assesses the sustainable design, construction, and maintenance of landscapes.
The American Society of Landscape Architects (ASLA) proudly announces the 25 winners of the ASLA 2018 Professional Awards. Selected from 368 entries, the awards recognize the best of landscape architecture in the general design, analysis and planning, communications, research and residential design categories from the United States and around the world.
The winners will receive their awards at the ASLA 2018 Annual Meeting and EXPO in Philadelphia on Monday, October 22, at the Pennsylvania Convention Center.
Winning projects are designated as either an honor award or an award of excellence, which is the highest possible distinction.
General Design Category
Award of Excellence
Brooklyn Bridge Park: A Twenty Year Transformation, Brooklyn, New York
by Michael Van Valkenburgh Associates (Brooklyn, New York) for Brooklyn Bridge Park
Chicago Riverwalk | State Street to Franklin Street, Chicago
by Sasaki (Watertown, Massachusetts) and Ross Barney Architects (Chicago) for the Chicago Department of Transportation
Iqaluit Municipal Cemetery, Iqaluit, Nunavut, Canada
by LEES+Associates (Vancouver, B.C., Canada) for the City of Iqaluit
Legacy and Community: Juxtaposing Heritage and Invention for Duke University’s West Campus, Durham, North Carolina
by Reed Hilderbrand LLC Landscape Architecture (Cambridge, Massachusetts) for Duke University
Longwood Gardens Main Fountain Garden, Kennett Square, Pennsylvania
by West 8 Urban Design & Landscape Architecture (Rotterdam, Netherlands) for Longwood Gardens Inc.
Re-Envisioning Pulaski Park, Northampton, Massachusetts
by STIMSON (Cambridge, Massachusetts) for the City of Northampton
Tippet Rise Art Center, Fishtail, Montana
by Oehme, van Sweden | OvS (Washington, D.C.) for Tippet Rise Art Center
Tongva Park and Ken Genser Square, Santa Monica, California
by James Corner Field Operations LLC (New York) for the City of Santa Monica
Walker Art Center Wurtele Upper Garden, Minneapolis
by Inside | Outside + HGA (Minneapolis) for the Walker Art Center
Analysis and Planning Category
Award of Excellence
A Colorado Legacy: I-25 Conservation Corridor Master Plan, Douglas County, Colorado
by Design Workshop (Aspen, Colorado) for The Conservation Fund
Extending Our History, Embracing Our Future, Madison, Wisconsin
by SmithGroup (Ann Arbor, Michigan) for University of Wisconsin-Madison
From Pixels to Stewardship: Advancing Conservation Through Digital Innovation, Austin, Texas
by Andropogon Associates Ltd. (Philadelphia) for the Shield-Ayres-Bowen Family
Iowa Blood Run Cultural Landscape Master Plan, Madison, Wisconsin
by Quinn Evans Architects (Madison, Wisconsin) for Iowa Department of Natural Resources (Todd Coffelt, Michelle Wilson, John Pearson, Frank Rickerl, Pat Schlarbaum, and Kevin Pape), State Historical Society of Iowa (Jen Bancescu, Doug Jones, Susan Kloewer, and Steve King), Iowa Office of the State Archaeologist
Willamette Falls Riverwalk, Oregon City, Oregon
by Snøhetta (New York) for Project Partners: Oregon Metro, City of Oregon City; Clackamas County; State of Oregon; PGE Falls Legacy LLC
Award of Excellence
100 Years of Landscape Architecture at The Ohio State University
by Landscape Architecture Section, Knowlton School, The Ohio State University (Columbus, Ohio)
Homeplace: Conversation Guides for Six Communities, Rebuilding After Hurricane Matthew
by NC State University Coastal Dynamics Design Lab (Raleigh, North Carolina) for the Hurricane Matthew Disaster Recovery and Resilience Initiative (HMDRRI)
Marnas: A Journey through Space, Time, and Ideas
by Anne Whiston Spirn, FASLA
VanPlay: Plan to Play
by Design Workshop Inc. (Denver) for the Vancouver Park Board
Atlas for the End of the World – Atlas for the Beginning of the Anthropocene
by Richard Weller, ASLA, University of Pennsylvania (Philadelphia)
Design with Dredge: Resilient Landscape Infrastructure in the Chesapeake Bay, Baltimore, Maryland
by Mahan Rykiel Associates (Baltimore, Maryland) for the Maryland Port Administration
Urban Aquatic Health: Integrating New Technologies and Resiliency into Floating Wetlands, Baltimore
by Ayers, Saint, and Gross (Baltimore) for the National Aquarium
Residential Design Category
Award of Excellence
Balcones Residence, Austin, Texas
by Word + Carr Design Group (formerly known as Mark Word Design) (Austin, Texas)
Sustaining A Cultural Icon: Reconciling Preservation and Stewardship in a Changing World, Newport, Rhode Island
by Reed Hilderbrand LLC Landscape Architecture (Cambridge, Massachusetts) for Dorrance Hill Hamilton
Yard, Portland, Oregon
by 2.ink Studio (Portland, Oregon) for the Key Development Group
The Landmark Award recognizes a distinguished landscape architecture project completed between 15 and 50 years ago that retains its original design integrity and contributes significantly to the public realm of the community in which it is located.
The Landmark Award
From Weapons to Wildlife: The Rocky Mountain Arsenal National Wildlife Refuge Comprehensive Management Plan (Douglas County, Colorado)
by Design Workshop Inc. (Denver, Colorado)
The professional awards jury included:
Mark A. Focht, FASLA, Chair, New York City Parks and Recreation, New York City
Gerdo Aquino, FASLA, SWA Group, Los Angeles
Anita Berrizbeitia, ASLA, Harvard Graduate School of Design, Cambridge, Massachusetts
Christian Gabriel, ASLA, U.S. General Services Administration, Washington, D.C.
Terry Guen-Murray, FASLA, Terry Guen Design Associates, Chicago
Dale Jaeger, FASLA, WLA Studio, Athens, Georgia
Sam Lubell, Journalist, New York City
Patrick Phillips, Urban Land Institute, Washington, D.C.
Barbara Wilks, FASLA, W Architecture + Landscape Architecture LLC, New York City
For the selection of the Research Category, the jury was joined by M. Elen Deming, FASLA, North Carolina State University, Raleigh, North Carolina, for the Landscape Architecture Foundation (LAF) and Ashley Steffens, ASLA, College of Environment and Design, University of Georgia, Athens, Georgia for the Council of Educators in Landscape Architecture (CELA).
New reconciliation parks in the South — like the Gathering Place in Tulsa, Oklahoma, and Red Mountain Park in Birmingham, Alabama — are explicitly designed to bring together previously-segregated communities. But the new Unity Park in Greenville, South Carolina, goes a step further: it will not only bridge communities but also actually merge two once-segregated parks. Meadowbrook Park, which was once white-only, and Mayberry Park, a smaller green space designated for African Americans, will come together in the new 60-acre Unity Park while still maintaining their distinct histories and identities. This inclusive, $40-million green space is expected to open in 2020.
According to Darren Meyer, ASLA, principal at Ohio-based MKSK Studios, an urban design and landscape architecture firm, the park comes out of a broader planning process for the Reedy River Development Area, an area just west of downtown Greenville. The goal for the city is to create more equitable downtown neighborhoods, with the new park at the center.
In an interview, Meyer said the park is only one component of a new “community character plan” for a 350-acre district that includes form-based code, mixed-use developments, affordable housing, and transportation. A ring of new affordable housing will be built around the park, in an attempt to prevent Unity Park from inadvertently becoming a gentrifying force that displaces the existing community.
According to Meyer, the city has increased investment into its affordable housing trust fund, which is also receiving private and philanthropic funds. The first round of affordable housing is now being built while work begins on the underlying park infrastructure.
Unity Park will include a 120-feet-tall observation tower, which will act as a beacon at night; a great lawn; nature and “destination” playgrounds; a gathering space and visitors center; and pedestrian bridge to improve connectivity.
The city brought an inclusive, community-based planning effort that won approval from African American communities along the park. Greenville News reports that “Mary Duckett, head of the traditionally low-income and African-American Southernside neighborhood association….has been satisfied that its voice was heard and that the park will be one that is welcoming for all.”
Meyer said the planning process was viewed as successful because project leaders “put a tremendous amount of effort into cultivating good relationships. They knew that is really the foundation of trust and a key part to inclusive decision-making.”
As part of neighborhood planning and outreach, the city brought in a fire truck that kids could play on; a mobile recreation vehicle, with sports play equipment; and hosted a cook-out for 300 community residents. “These were great events designed to build community.”
MKSK also coordinated planning and design community meetings, with the goal of collecting stories, including those about the African American minor league baseball team that plays in Mayberry Park, and incorporating them into an authentic design. That led to a temporary installation — a mosaic of names of baseball players set into steps leading to the baseball field.
Meyer said the park is not just about re-connecting once-segregated parks, but also about re-connecting the community to a lost river ecosystem. Some 2,000-feet of the Reedy River that runs through the park will be taken out of its concrete channel and become a showpiece of ecological restoration. MKSK will significantly widen the riparian corridor and treat the floodplain in the park as an ecological system.
MKSK made the case to city leaders that “the health of the river is tied to the health of the community. There is a quantifiable public health benefit to bringing back the river and wetlands. Beyond the ecological uplift, there is also a great educational opportunity.”
Robert Gibbs, ASLA, is president of the Gibbs Planning Group, which has advised and planned commercial areas in some 500 town centers and historic cities in the U.S. and abroad. Gibbs is a charter member of the Congress for New Urbanism, a lecturer at the Harvard University Graduate School of Design, author of Principles of Urban Retail Planning and Development, and co-author of eight books.
There’s going to be hundreds of stores closing. In 2018 already more stores have closed than in 2017. What this means for the industry: a lot of retailers are moving stores into downtowns.
Research shows millennials and other shoppers want the experience of being in an urban environment rather than just buying a pair of pants online. So mall closures are good for cities. You’re going to see retailers moving back into cities, and many Internet-based companies opening brick and mortar stores.
Warby Parker, an online eyeglass company, is opening physical stores, and Amazon’s opening two hundred bookstores in cities. Internet-based companies have found when they open a brick-and-mortar store, their online sales go up 10-15 percent.
About a fourth-to-a-half of malls will close in the next five to ten years.
The malls that are going to be sustainable — after what I call post-mall period — will be ones well-positioned, with really strong demographics — either high-end demographics or strong middle-class demographics. They’ll have good locations with access to regional transportation.
Only malls that keep their department stores will survive. A mall cannot function without department stores. So when they lose all but one or all of their department stores, they have to close.
The other factor for successful malls is to be mixed use and incorporating residential, office, and civic space into their properties. Just being a retail destination alone is not sustainable right now.
Transitioning to mixed use is not that hard to do because malls were built with more than twice the parking that is necessary by today’s standards. So, about half of the parking lots can be converted into other land uses.
The Grove in Los Angeles and 3rd Street Promenade in Santa Monica offer highly-stylized versions of urban forms – in the case of the Grove, an old European urban downtown, and 3rd Street Promenade, the American main street. Are successful contemporary shopping districts about re-using familiar urban forms in new ways?
Oh, very much so. The traditional grid or traditional straight main street is the best format for the new town centers being developed. There has been a lot of experimentation with curvilinear forms with parallel streets, and those haven’t worked too well. It has to be a simple main street.
We find the best shopping districts are only about a quarter of a mile long, about 1,200 feet. If you have a longer corridor, then we break it into sections. Where they come together, we anchor it with some form of civic or retail space. So, just the old fashioned street works the best, or with the very-slight deflection.
Some background on promenades like the one on 3rd Street in Santa Monica: In the 1960s and 70s, many downtowns declined and lost significant market share to large suburban shopping malls. In a well-intended response, over 250 downtowns imitated shopping centers and closed their main streets to vehicles in order to create outdoor pedestrian malls. Kalamazoo, Michigan, and Fresno, California, were pioneers in this experiment.
Unfortunately, all but ten of the pedestrian malls were a failure (the ones that survived are mostly in college towns). Most of the downtowns declined even further and remained almost entirely-vacant for decades. Even Santa Monica’s Third Street promenade and Miami Beach’s Lincoln Road were initially overwhelming failures. Without department stores, the pedestrian malls lacked the necessary critical mass of shopping to justify the inconvenience of parking in remote decks. Small retailers cannot afford much advertising and rely on drive-by impulse traffic for sales.
We have been advising several downtowns, including Fresno, to re-open their streets to cars with generous parallel parking. The key is to implement modern traffic-calming measures, an attractive public realm, and realistic codes to enable walkability and cross-shopping.
What are the core components of a successful retail district layout? How do you get density, inter-connectivity, and scale right? On the one hand, there is the model of Soho in NYC, with its grid layout, but you also have the standard outlet mall, defined by an arterial form.
A fairly straight or simple, deflected street works the best. It’s essential a retail district have multiple uses. All four land uses are best: commercial, office, civic, and residential. It’s also essential to have a good public realms in these centers and appropriate sidewalks for the type of transect that it is, whether it be a town or a city or hamlet. There has to be a good public space, such as a square or a plaza.
Retailers have higher sales and are willing to pay higher rents when they’re located on a square. We have found retailers who will give up exposure on the end caps of a street in exchange for being on the square, because that is where more people are and where they will achieve higher sales.
It’s really important for landscape architects to embrace the public realm, to be strong advocates for parks and plazas, a nice streetscape.
Retail has been described as a tool for revitalizing small town main streets and the downtowns of major cities. What else needs to come with retail to make the revitalization effort work?
Retail alone can’t revitalize a downtown. One of the most important elements is transportation. Streets have to be calmed from highways into real, walkable streets. Many downtowns are suffering just for lack of on-street parking or because the streets are too wide and traffic is too fast.
In addition, it is important to have a strong civic component: the library, city hall, courthouses should be in the downtown, not in the suburbs. For example, we find a good library can bring an average of 1,200 people per day — that’s as many as a good department store.
High density residential and office space are important as well. The Urban Land Institute (ULI) recently did a study that found every office worker directly supports twenty-five square feet of retail and restaurant space. If we can get office workers downtown, you can share parking with the office, because of off-peak times with retail.
So downtowns have to return to being real mixed-use, urban, walkable centers.
What is the role of landscape architecture in successful retail environments?
The leaders of many shopping center developers we work with are landscape architects. Many of our clients are former landscape architects or practicing landscape architects.
More than the engineers, architects or the MBA types, we find landscape architects have a holistic approach, and we enjoy working with them. They understand the physical realm and design, but also politics, the environment, and a little bit of engineering and economics.
More broadly, the landscape architect working on a retail environment has to advocate for good place-making: a nice public realm — public squares of plazas; traffic calming; and the right height-to-width ratios on the streets so streets aren’t too wide.
Do trees and other green features increase sales?
Trees are really essential for a competitive shopping district. There was a study by Kathleen Wolfe that indicated trees increase price elasticity by 9-12 percent. In other words, people feel comfortable paying up to twelve percent more for the same product if they purchase in a well-landscaped place with nice streets. Also, when properly located, street trees keep people in the downtown district longer. They feel more relaxed and are more likely to spend more money.
We’re working in Palm Desert, California, and found the shady side of the street has significantly higher sales and rents than the sunny side of the street. We’re redesigning the street to be asymmetrical, so that the sunny side will have a wider sidewalk so that we can put in a triple bosque of trees for shade. In this case, the shade is directly responsible for higher sales in retail. Research indicates that, too.
The one pet peeve I have is that many landscape architects — including myself (as I’ve done this) — tend to put street trees on an arbitrary grid, 22 feet or 28 feet on center, whatever. Very often the trees end up blocking a merchant’s storefront, sign, or window display.
We believe developers and communities should put in a lot of street trees but use common sense when locating them. Street trees should be on the property lines of commercial buildings rather than in middle and in front of buildings.
Street trees are very important for retail sales, and that’s been proven. Also, for residential values, there are studies that indicate home values are much higher on shady streets than streets without trees.
Urban stores of retailers like Bonobo, Apple, and others are essentially show-rooms, where you try out goods and then purchase online and receive products by mail. What other technology-enabled retail innovations do you see coming to the built environment?
Technology has been good and bad. One negative is many online manufacturers are selling directly to the customers, and they are not sending merchandise to small retailers. They’re cutting the retailer out of the better merchandise, which is hurting their sales.
A positive is many stores are getting rid of cash registers so you can walk in and out.
Another positive: Store are becoming warehouse and distribution centers. Department stores are now places where you can do a same-day pick-up of an order you made online. Physical stores are becoming return centers for Amazon and other online sites. For example, Kohl’s is partnering with Amazon to be a return center. This helps bring people to that shopping district who ordinarily wouldn’t go there. They’re going to make a return and then while they are making their return, they will go to restaurants or other shops.
The Batture, a historic squatter community nestled between the levee and the Mississippi River in New Orleans is an unconventional model of a resilient community. But as climate change forces more coastal communities to deal with greater risks, their approach offers some important lessons.
This tiny community of now only 12 homes, which has fought eviction by the city government for generations, is constantly exposed to flood risk. But living right on the banks of the Mississippi has given the community a deeper understanding of the river’s ebbs and flows. The residents of the Batture are always watching the weather, know when flooding will occur, and are therefore better prepared for disaster. By constantly living with risk, the community has in turn become more adaptable and safer.
In a talk at the Environmental Design Research Association (EDRA) in Oklahoma City, Carey Clouse, a professor of landscape architecture at the University of Massachusetts at Amherst, said the Batture is an important contrast to other communities in New Orleans that were separated from the river by the levee — communities that literally couldn’t see the river, canals, or other water bodies. With the great risk posed by the Mississippi and other water bodies out of view, these communities became “overconfident” about the safety of the levee system.
In reality, many communities were made even more vulnerable because they didn’t know what was coming. As the levees failed, the result of Hurricane Katrina was some 400,000 were displaced and 100,000 homes were destroyed. “Sadly, vulnerable people had no awareness of where they were in regards to sea level. The Army Corps of Engineers and insurance companies obscured the risks. 400,000 people were blind to topography.”
But the Batture, a “self-sufficient, resilient, and adaptive community, suffered almost no damage in the Katrina flooding.”
In the liminal space between the river and the embankment, the Batture was created through “Do-It-Yourself (DIY) urbanism, a homesteader’s approach.” Clouse spent time researching the community and found it was a “hidden landscape, filled with self-built structures” on pylons. The river is ever present. “It’s 50 feet away from houses but can pass right below their feet during storms.” Each resident has created homemade protections against floating debris.
Clouse believes residents of the Batture are “more secure having taken risk into their own hands, rather than relying on the city government.” In this “quirky, escapist, anti-urbanist community,” there is “great toughness and resilience,” rooted in a deep connection to place and the river.
The Batture began in the early 1900s as a squatter community for people who worked in fishing and other marine trades. In the Great Depression, the Batture swelled to hundreds of homes, becoming a Hooverville on the river. Settlers built homes out of driftwood, creating a “ramshackle shanty town.” There was a tiny school and church, but no roads, water, or electricity. In the 1990s, the New Orleans government came in removed many of the homes.
Today, there are just 12 homes left, from “the humble to the post-modern.” Batture residents can’t legally buy or sell their own properties, have no access to insurance or protection by the city or state, but they do have now access to “city fire, water, electricity, and P.O. boxes.” A local lawyer has sued the residents, claiming to own the entire Batture and is trying to remove the last remaining residents, but judges have recognized the rights of the existing tenants. “Many believe they deserve to stay.”
For Clouse, the lesson of the Batture is that “with incremental exposure to risk, communities can alter their landscapes and lifestyles to manage that risk.” Levees, with their air of safety and permanence, may actually “invoke crises.” But in communities like the Batture, where people live in close contact with nature and risk, “they can cope, thrive; they can take matters into their own hands.”
Climate change is intensifying the negative impacts of standard development practices and is putting people and communities across the United Sates at risk. The American Society of Landscape Architects (ASLA) convened an interdisciplinary Blue Ribbon Panel on Climate Change and Resilience in September 2017, and this week ASLA released a blueprint for helping secure a sustainable and resilient future that summarizes the panel’s work and recommendations.
Promote holistic planning and provide multiple benefits
Take into account environmental justice, racial and social equity
Reflect meaningful community engagement
Regularly evaluated and reviewed for unintended consequences
Address broader regional issues as well as local and site-specific concerns.
Smart Policies for a Changing Climate also found that:
Designing and planning in concert with natural systems promotes resilience, capitalizes on the benefits of natural systems and provides greater long-term return on investment.
Key strategies include use of green infrastructure, native plants, urban and suburban tree planting plans, and healthy soil management practices.
Compact, walkable, and transit-oriented “smart growth” communities reduce energy use and are climate smart.
Special attention must be paid to vulnerable communities in coastal and inland flood plains and underserved and low-income communities.
Transportation should be considered critically as not only a connection point between home to work/services, but also as a source of greenhouse gas emissions, and a contributor or detractor to a community’s appearance and function in light of a weather event.
Agricultural systems must be addressed because they are being stressed by unsustainable farming practices and farmland is being lost to expanding development and sprawl.
“Our nation, states, counties, and cities are looking for solutions to mitigate the risks from the changing climate and extreme weather events,” said Nancy C. Somerville, Hon. ASLA, ASLA executive vice president and CEO. “With this report, landscape architects and their design and planning colleagues forward public policy recommendations that can make communities safer while taking climate change and existing natural systems into account.”
ASLA released the report at an evening reception and candid discussion yesterday with Somerville, and ASLA Blue Ribbon Panel members Adam Ortiz, director for the Department of the Environment for Prince George’s County, Maryland, and Diane Jones Allen, program director for Landscape Architecture, the College of Architecture, Planning and Public Affairs at the University of Texas at Arlington and principal landscape architect with DesignJones LLC.
We have provided a platform for landscape architects, public officials, and other design and planning professionals to share their views on how to help communities adapt to climate change through smart design policies. Go to https://climate.asla.org.
The Blue Ribbon Panelists included a diverse range of practitioners, experts and stakeholders with different levels of experience working in different aspects of geographic and technical design. They are:
Vaughn Rinner, FASLA, SITES AP, ASLA Immediate Past President, Chair;
Armando Carbonell, FAICP, Senior Fellow and Chair, Department of Planning and Urban Form, Lincoln Institute of Land Policy;
Mark Dawson, FASLA, Managing Principal, Sasaki Associates Inc.;
Tim Duggan, ASLA, Founder, Phronesis;
Ying-yu Hung, ASLA, Managing Principal, Principal, SWA, Los Angeles Studio;
Dr. Dwane Jones, Ph.D., Director of the Center for Sustainable Development + Resilience at the University of the District of Columbia;
Diane Jones Allen, ASLA, Program Director for Landscape Architecture, the College of Architecture Planning and Public Affairs at the University of Texas at Arlington and principal landscape architect with DesignJones LLC;
Adam Ortiz, Director for the Department of the Environment for Prince George’s County, Maryland;
Nancy Somerville, Hon. ASLA, SITES AP, Executive Vice President and CEO, ASLA; and;
Dr. Jalonne L. White-Newsome, Ph.D., Senior Program Officer, Environment, The Kresge Foundation.
Some quotes from panelists on the importance of adopting effective public policies and landscape architecture design solutions:
“The plans we’re going to have in the future to deal with living with water have to be more realistic. We have to live with the acknowledgement that there will be hurricanes and areas that naturally want to flood. How do we build differently as opposed to thinking we can keep water out?”
Diane Jones Allen, ASLA Program Director for Landscape Architecture, the College of Architecture, Planning, and Public Affairs at the University of Texas at Arlington
“We have a number of antiquated policies within governmental structures. Reevaluating them every five years or so would help us to reflect what is currently happening and to better project how we should design communities to be able to proactively respond to such changes and challenges.”
Dr. Dwane Jones, Ph.D. Director of the Center for Sustainable Development + Resilience at the University of the District of Columbia
“All public projects really have to be interdisciplinary. They have to incorporate the local culture, the local economy, forward-thinking design concepts, as well as good engineering. All that together, in a very thoughtful way that respects the complexity of our society, is a way to make a sustainable project that people enjoy and love.”
Adam Ortiz Director for the Department of the Environment for Prince George’s County, Maryland
“One of the things we need to be doing is do a lot more experimentation. Sometimes you just need to be able to try things and see if that solution can take you forward. If it’s not a good solution, let’s try something else. That kind of creativity and ideas is really what innovation is all about.”
Vaughn B. Rinner, FASLA, SITES AP Immediate Past President, American Society of Landscape Architects
“Our standard development practices are not sustainable, but when we understand and work with natural systems, we can build safer and healthier communities.”
Nancy C. Somerville, Hon. ASLA. SITES AP Executive Vice President and CEO, American Society of Landscape Architects
“My hope is that we embed true kinds of community engagement, justice, and equity into our focus on climate change and resilience. We need to really do that in a way where it’s not so scientific. The social engineering matters as well. It’s what you’re doing in your profession that impacts people and makes those impacts equitable.”
Dr. Jalonne L. White-Newsome, Ph.D. Senior Program Officer, Environment The Kresge Foundation
Why retrofit cities and suburbs with green infrastructure? Re-inserting the landscape back into the built environment helps us strike a better balance with nature, boost neighborhood health, and solve stormwater management problems. In a session at the Congress for New Urbanism (CNU) in Savannah, Georgia, a landscape architect, an urban designer, and a civil engineer offered fresh takes on why green infrastructure is so valuable.
According to landscape architect Kevin Robert Perry, ASLA, founder of Urban Rain Design, the issue is the sheer amount of impervious surfaces, the oceans of asphalt in our cities and suburbs, which can account for half of the built environment. “We need to get more water into the ground.” He said communities should take a “decentralized, natural approach” to getting more stormwater off pavement and into the ground, where it can recharge underlying aquifers.
In increasing levels of optimization, communities can maximize landscape along streets; increase their tree canopies; create park-like streets, sidewalks, and driveways; scale up networks of green, complete, streets; or build an “entire green envelope, covering buildings and streets” across the entire city or suburb.
But Perry noted the need to keep actual green infrastructure solutions simple and low-cost. His well-known Siskiyou Green Street in Portland, Oregon, cost just $20,000.
Ellen Dunham-Jones, professor of urban design at Georgia Tech and author of Designing Suburban Futures, and her students collaborated with the Atlanta city government, as it begins to realize its vision of a new city design, which is rooted in Atlantans’ love of the legacy of Martin Luther King, Jr, who was born and raised there, and the city’s luxuriant tree canopy, which covers some 45 percent of the city. The design paints a picture of equitable growth in an urban forest.
Dunham-Jones and her students began to examine how a city expecting to triple in population could still maintain its tree canopy, with all its health and stormwater management benefits.
Beyond concentrating development in centers and corridors, so as to protect old growth trees, another way to do this is to retrofit trees into neighborhoods through novel regulations.
Using the Cascade Road neighborhood, a majority African American community in southwest Atlanta, as a study site, she sent out seven pairs of students to identify some options. Her team recommended re-planting or relocating trees off private property into nearby public conservation easements, and “fee-simple” donations of wetlands and flood zones that have mature trees to the city government.
“The idea is to move more trees into the public realm. We can protect them better if they are on public property; and we can also protect the rights of private property owners.”
She said Atlanta hopes to enshrine many of these ideas in a new, more stringent “nature ordinance,” designed to replace the current tree ordinance, which has relatively lax rules on tree removal.
And Paul Crabtree, a civil engineer who runs the Crabtree Group, concluded that those who are forging innovative green infrastructure solutions in communities should be considered “shock troops, highly-skilled soldiers on the front line, taking heavy casualties, even when successful.” After much persuasion and many grants, he managed to create an innovative “tree zipper” in the middle of a street in Ojai, California.
The American Society of Landscape Architects (ASLA) convened a Blue Ribbon Panel on Climate Change and Resilience last fall to offer communities strategies for adapting to global climate change and its impacts on human health and the environment. The panel, composed of leaders from landscape architecture, planning, engineering, architecture, public policy, and community engagement, met September 21-22, 2017, at the ASLA Center for Landscape Architecture in Washington, D.C.
Watch and share the videos below that introduce our panelists and their smart strategies to strengthen community resilience.
The panel’s recommendations will be forthcoming on June 19, 2018.
Cities are sitting on a largely underused public resource: urban stormwater wetlands. If properly designed, these landscapes can reduce flooding, support urban wildlife, and serve as public space. A new report Design Guidelines for Urban Stormwater Wetlands — authored by an interdisciplinary group of researchers and students at the MIT Norman B. Leventhal Center for Advanced Urbanism led by Celina Balderas Guzmán, Heidi Nepf, and Alan Berger — advocates for the positive role wetlands can play in cities and outlines research that provides insights for landscape architects, engineers, and planners.
The authors make a case for the potential of urban wetlands, especially in a time of changing climate and deteriorating urban infrastructure. “Wetlands, the world’s most valuable terrestrial ecosystem, provide a multitude of ecosystem services: water treatment, flood protection, carbon storage, habitat, recreation, and aesthetic value,” they write.
And yet, in many cities, existing wetlands have been filled, paved, developed, or channelized, eliminating the benefits they provide. In this context, the authors see opportunity. “Just as urbanization has obliterated wetlands, urbanization can build them new,” they write. “While constructed wetlands are not in all aspects comparable to natural wetlands, they can partially restore some lost ecosystem services.”
However, urban wetlands present challenges for the prospective designer, not the least of which is understanding hydraulic dynamics well enough to create a design that is both beautiful and functional. This is where the team’s research steps in.
At MIT’s Nepf Environmental Fluid Mechanic Lab, the researchers tested dozens of different wetland landform configurations to better understand how “island size, shape, and placement affect hydraulic flow and provide ecological habitat.”
Researchers fabricated models of different topographies from high-density foam using a CNC milling machine. The models were then inserted into a flume (essentially a long, plexiglass tank that circulates water) for testing. The researchers used dye to track how different landform configurations impact the speed and direction of water flowing over the model.
In analyzing the results of these tests, the authors made some findings. First, topography matters. Topography describes the physical features of a landform. Results varied widely for the different landforms, meaning that certain design approaches are more or less appropriate depending on the goals of the design.
According to the authors, “wetland engineers and designers must make carefully considered design decisions based on hydraulic goals, balanced with ecological and urban goals as well.”
Second, in attempting to slow down water and filter pollutants, smaller interventions may be more effective. “Adding topography subtracts volume from a wetland’s potential water storage capacity,” they write, which means that “water will exit sooner simply because there is less water volume, leading to less pollution treatment.”
In their tests, the researchers found that models were most effective when the total volume of topography equaled approximately 10 percent of the total volume of the basin, although they caution this number may shift in real-world applications.
Of the thirty-four topographies tested, the team found two that provided the best balance of hydraulic performance and pollutant filtering capacity. They conclude the report by applying these topographies to two case study sites: Buffalo Bayou in Houston, Texas, and Taylor Yard, on the Los Angeles River in Los Angeles, California.
The case studies are intriguing, but may be frustrating to those hoping for a more detailed explanation of how to apply the team’s findings. However, the authors note that the studies are “urban design frameworks” and meant to be conceptual. Those seeking to transfer the team’s research to real world projects will likely find their topographic models to be helpful starting points, but will still need to develop unique design solutions that respond to site and program requirements.
Ultimately, Design Guidelines for Urban Stormwater Wetlands aims to “inform decision makers, planning agencies, consulting engineers, landscape architects, and urban designers about the efficacy of using ecologically-designed constructed wetlands and ponds to manage stormwater while creating new public realms.”
However, the authors do not present any hard and fast rules for designing urban wetlands. Instead, the report makes a compelling case for why constructed stormwater wetlands are an important and underused resource in urban areas, and provides information that may prove valuable to designers and public officials looking for ways to extract more public benefit from stormwater infrastructure.
“We hope this work gives practitioners and designers a new set of adaptable forms to work with and elaborate upon either in implementation or in future research,” says co-author Celina Balderas Guzmán, describing the study as “a crucial first step to explore forms and validate designs quickly and easily with scientifically rigorous metrics.”
In this respect, the report is a success, presenting imaginative possibilities for new urban spaces supported by hard research. As a resource for designers, Design Guidelines for Urban Stormwater Wetlands may not have all the answers, but it does have important ones.