A Model Plan for Protecting Vital Coastal Habitats

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Conserving California’s Coastal Habitats / The Nature Conservancy

Sea level rise is coming, and its impacts will be far reaching. For the state of California, the threat of sea level rise may prove existential. More than two-thirds of its population lives in the states’ 21 coastal counties, which are responsible for 85 percent of the state’s GDP.

However, sea level rise will not just impact human activity. Rising tides will also drastically alter, and in some cases destroy, important coastal habitats. Conserving California’s Coastal Habitats, a new report from The Nature Conservancy, provides a startling analysis of the future of California’s coast and charts a path forward for coastal conservation efforts.

The California coast represents the most biodiverse region in the country’s most biodiverse state, lending nationwide significance to coastal conservation efforts there. “The state of California has been a leader in environmental policy for over a century,” say the report’s authors, praising the state’s “legacy of coastal conservation.”

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California’s coastline / Sue Pollock, The Nature Conservancy

“However, current policy and decision-making frameworks were developed to reflect static existing conditions and are not well suited for the dynamic needs of adapting to sea level rise,” the authors warn.

At risk are “nesting areas along global migrations for diversity of species, as well as nesting and pupping habitat, nursery habitat, and important feeding grounds critical to populations of many species, some which are found nowhere else in the world.”

Sea level rise threatens areas of human settlement and activity, too. The conversion of land to tidal and subtidal coastline will reduce the size of natural buffers, providing less protection to human settlements in coastal flooding events. Saltwater intrusion will impact agriculture. According to the authors, “sea level rise and associated flooding will threaten nearly $100 billion worth of property along the California coast by 2100.”

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Coastal infrastructure is at risk from sea level rise / Thomas Dunklin

The report’s authors used GIS to identify and map the coastal habitats, ecosystems, and infrastructure most at risk from sea level rise. They based their projections on two and five feet of sea level rise, which they say are in keeping with projections issued by the California Coastal Commission. The authors then developed metrics to measure the potential impact of sea level rise on a given area and the area’s vulnerability and ability to adapt.

Their findings are worrying. “As much as 25 percent of the existing public conservation lands within the analytic zone will be lost to subtidal waters,” they warn. Habitats for eight imperiled species will be completely inundated. Large portions of other significant coastal habitats are “highly vulnerable,” including 58 percent of rocky intertidal habitats, 60 percent of upper beaches, and 58 percent of regularly-flooded estuarine marshes. “At least half of the documented haul-outs for Pacific harbor seals and Northern elephant seals, and nesting habitats for focal shorebirds like black oystercatchers, are also highly vulnerable.”

The report’s maps show that habitats in the San Francisco Bay Area are particularly at risk. There, vulnerable landscapes and habitats–such as 87 percent of the state’s regularly-flooded estuarine marsh–will be trapped between rising seas on one side and human development on the other. “The built environment–including roads and other infrastructure–creates barriers that prevent coastal habitats from moving inland,” while “dikes, levees, and other water control features negatively impact the health and function” of these threatened landscapes.

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California Coastal Conservation Assessment / The Nature Conservancy

The authors found that sea level rise could adversely affect public access to California’s coast. “Sea level rise will diminish coastal access opportunities throughout the state by reducing beach widths, submerging rocky intertidal areas, and flooding coastal beach infrastructure.”

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Sea level rise threatens access to California’s beaches and coastal public lands / Sylvia Busby

In the face of these potentially-devastating impacts, the report’s authors present a suite of strategies for conservation in the era of climate change. According to the authors, conservation managers need to “conserve and manage for resilience.” This includes maintaining the conservation status of existing conserved lands and identifying and protecting resilient coastal landscapes that are not vulnerable to sea level rise.

The Nature Conservancy recommends managing for resilience through the use of sediment augmentation and sand placement. “The majority of highly vulnerable conservation lands in need of managing in place for resilience are found in the San Francisco Bay Delta,” an observation that speaks to the importance of landscape-led initiatives such as the recent Resilient by Design Bay Area Challenge.

The authors also call for conserving nearly 200 square kilometers of potential future habitat areas and adapting the built environment “with more natural coastal processes in mind” – in effect, giving the coastline room to change.

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California’s coastline / Taylor Samuelson, California State Coastal Conservancy

“As sea levels rise, California’s coast will erode and evolve, and habitats will need to shift. Our current conservation efforts and land use management decisions must focus on further supporting these natural processes and enabling the transition and movement of coastal habitats as sea levels rise. Conservation in the face of sea level rise requires an adaptive process that embraces the reality of a dynamic coastline.”

The reports’ recommendations and strategies are “spatially explicit,” with specific recommendations for areas depending on their vulnerability and adaptive capacity. There are detailed high-resolution maps that illustrate the location, distribution, and severity of risks as well as opportunities.

“The results of this spatially explicit assessment provide a foundation of information to support immediate action to conserve habitats and biodiversity in the face of sea level rise,” the authors argue. “With so much of California’s coastal habitats, imperiled species, and managed lands at risk from sea level rise, immediate collective action is necessary to conserve these natural resources into the future.”

Download the full report and maps.

Most Popular DIRT Posts of 2018

Approach to Uluru Kata-Tjuta National Park, Australia / TCL

As we look forward to covering new stories on the built and natural environments this year, here’s a look back at the 10 most popular DIRT posts of 2018. Readers were most interested in the debate over whether beauty still matters in an age dominated by science; how the practice of landscape architecture is evolving to deal with climate change and increasingly diverse communities; how urban sprawl is impacting biodiversity; and the interesting relationship between landscape architecture and retail. As in past years, new research on the health benefits of nature remains a favorite topic.

Always worth mentioning: We are looking for original op-eds, particularly from member landscape architects, designers, and planners, on topics that inspire you. And tell us about your new projects and research. Please email us at info@asla.org.

1) Is There Still a Place for Aesthetics in Landscape Design?

Kicking off a two-day planting symposium at the University of California at Berkeley, professor emeritus Marc Treib posed the question: Is there still a place for the “art of landscape design” in an age “dominated by the science of landscape ecology?” Planting design is often brushed aside as superfluous or unserious. British historian and critic Tim Richardson reminded the audience of the litany of unfavorable adjectives associated with artful planting: the bourgeois, the small-scale, the amateur, the hobbyist, the ephemeral, the female.

2) Best Books of 2018

If you are looking for a unique book to give as a gift or just one for yourself to delve into over the winter break, explore THE DIRT’s top 10 books of 2018, our picks for the best on the environment, cities, and landscape.

3) To Become More Resilient, Boston Takes a “Landscape First” Approach

Instead of simply responding to catastrophe, Boston is getting out front on climate change. As part of its Climate Ready Boston plan, the city of 670,000 aims to act fast and protect two coastal neighborhoods most vulnerable to rising sea levels and storms: East Boston and Charlestown. New plans for these neighborhoods explain how a simple fix like creating a temporary flood wall at the coastal end of the East Boston Greenway, at a cost of just $100,000, would protect 4,300 residents, 70 businesses and critical infrastructure, and result in $17 million in benefits.

4) Landscape Architects May Be Liable for Climate Impacts

When a neighborhood floods, who is at fault? A class action lawsuit in Houston asks that question. The residents of a master-planned community that flooded during Hurricane Harvey are suing the engineering firm that designed the neighborhood’s stormwater management system. While that suit targets engineers, it nonetheless represents the heightened risk landscape architects face from climate impacts on their projects.

5) New Maps Show How Urban Sprawl Threatens the World’s Remaining Biodiversity

At the United Nations World Urban Forum in Kuala Lumpur, Malaysia, next month, the McHarg Center for Ecology and Urbanism at the University of Pennsylvania will display an alarming set of new maps. They show, in bright red, that the growth of cities worldwide is on a direct collision course with the world’s remaining biodiversity.

6) MIT Researchers Seek Optimal Form of Urban Stormwater Wetland

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.

7) This Is Your Brain on Nature

Neurosurgeon Edie Zusman, a real-life Doogie Howser who started medical school at 19 and has completed some 6,000 brain and spinal surgeries, said what landscape architects do saves far more lives than what she does. The early prevention of disease reduces the need for surgeries. Prevention is made possible by eating healthy foods and walking and getting exercise in green environments that lower stress and improve well-being.

8) Interview with Robert Gibbs: Trees Cause You to Spend More

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.

9) Participatory Design Must Evolve

Participatory design is “hands-on democracy in action,” argue the editors of the impressive new book Design as Democracy: Techniques for Collective Creativity. Participatory design (also known as cooperative or co-design) is a process in which a designer actively involves all stakeholders in a design process. Unfortunately, many of the best-known techniques to enable this approach, which have been used for the past few decades, have become stale. This has led to complacency among designers, and less-than-ideal outcomes for communities that need their help. To revitalize the approach and achieve better results, the authors call for making participatory design “truly democratic.” Furthermore, it must become “contextual, open, experiential, substantive, and holistic.”

10) New Study: Technology Undermines the Restorative Benefits of Nature

We experience “soft fascination” with nature when we sit on a park bench and let our mind wander, taking in the trees and flowers, noticing birds and squirrels, feeling the breeze. This gentle decompression in nature is actually critical to helping us restore our ability to pay attention. We need breaks where our minds can just go slack and subconsciously take in the complexity of the natural world. Researchers are still trying to figure out the ideal “dose” of this green medicine, but benefits have been seen with just 10 minutes.

UN Climate Conference: New “Rule Book” for Measuring Carbon Emissions

UN Climate conference in Poland / UN News

During the latest United Nations climate conference, which just concluded in Katowice, Poland, some 190 countries reached agreement on next steps to move forward the landmark 2015 Paris climate agreement. After days of intense negotiation, countries agreed to a “rule book” for measuring their annual carbon emissions, including transparency guidelines that enable all countries to understand how emissions numbers and future commitments are calculated.

The Paris climate agreement calls for limiting the rise in global temperatures to no more than 2 degrees Celsius (3.6 degrees Fahrenheit). The framework essentially asks countries to make voluntary agreements to lower their emissions and uses global peer pressure to spur them to ratchet up their commitments every five years. The new system for measuring and communicating these reductions provides a platform for greater future commitments.

However, there were also some failures at the conference. According to The Guardian, disagreements over the future of carbon markets and “how countries can gain credits for their efforts to cut emissions and their carbon sinks, such as forests” were punted down the road. Brazil was seen as a spoiler on this effort, because their new leadership demanded “wording that critics said would allow for double counting of credits and undermine the integrity of the system.”

Brazil recently-elected Jair Bolsonaro, a right-wing leader who has promised to shut down Brazil’s environment ministry. He has come out against Brazil’s previous pledges to reserve 12 percent of the Amazon — a vitally-important rainforest that serves as the world’s lungs — for indigenous groups. He instead seeks to build highways through the forest, creating easier access for agri-businesses, and also build more dams. Bolsonaro has called the global scientific consensus on climate change “dogma” that ignores “evidence,” using language similar to that of US President Donal Trump, who has called global warming a “hoax” or “con-job.” Bolsonaro has also pulled out of hosting the next UN climate summit, all but erasing the moral leadership on climate change just exhibited in the Rio Olympics in 2016. And Brazil’s new foreign minister Ernesto Araújo recently said climate change is a “Marxist plot” by the Chinese to increase their competitiveness at the expense of Western economies.

The UN conference in Poland created necessary governance infrastructure, but the hard work on ratcheting up emission reduction targets will happen at the critical 2020 meeting, some five years on from Paris. There, countries must commit to incredibly-ambitious goals if we are going to stave off the worst effects of a global temperature rise. Meanwhile, 2018 will likely prove to be the hottest year on record, and greenhouse gas emissions increased by nearly 3 percent this year due a resurgence in oil and gas use.

In other climate change news:

The World Bank announced it will invest some $200 billion in climate change mitigation and adaptation through 2025. The funds will go towards boosting renewable energy production, helping 100 cities adapt to climate change, creating early warning systems for climate impacts, and improving “landscape management” of 120 million hectares of forests in 50 countries.

Some 415 investors managing $32 trillion in assets called on nations at the UN climate change conference to “achieve the goals of the Paris climate agreement; accelerate private sector investment in the low-carbon transition; and continue to improve climate-related financial reporting.”

A new study published in Science Advances found that natural solutions, including rural and urban reforestation, better forest and grassland management, and wetland and peatland restoration, could reduce US annual carbon emissions by 21 percent, an amount approximately equal to taking all cars off the road.

Thirteen federal agencies in the U.S. released the Fourth National Climate Assessment, which states that climate change could reduce US economic output by 10 percent by the end of the century if emissions aren’t cut fast. In comparison with the third report published four years ago, the new assessment concludes that total impacts from wildfires, drought, flooding, extreme heat, sea level rise, and spreading tropical diseases will be more severe and widespread. According to an analysis of the 1,600-page report by The New York Times, the report puts actual numbers on the expected cost of the coming impacts: “$141 billion from heat-related deaths, $118 billion from sea level rise, and $32 billion from infrastructure damage by the end of the century.” Additional frightening conclusions: “American exports and supply chains could be disrupted, agricultural yields could fall to 1980s levels by mid century, and fire season could spread to the Southeast.”

The report, which was released by the Trump administration on Black Friday in an likely effort to bury the findings amid the holiday shopping spree, calls for putting a price on carbon, taxing companies that release carbon emissions, and increasing investment in clean energy technologies. The fourth national assessment also makes the case for increasing “proactive” adaptation measures at all scales — from the community to national levels — and incorporating equity, justice, cultural heritage, health, and national security considerations into these approaches. But while the number of adaptation projects has greatly increased since the launch of the third national assessment in 2014, “adaptation implementation is still not commonplace.”

Read the summary of the fourth national assessment and ASLA’s report: Smart Policies for a Changing Climate, which offers recommendations on mitigation, adaptation, and resilience.

Kongjian Yu: To Save China’s Environment, Educate the Leaders

Letters to the Leaders of China / Terreform

Many have called Kongjian Yu, FASLA, president of Turenscape, the Frederick Law Olmsted of China. And with his new book Letters to the Leaders of China: Kongjian Yu and the Future of the Chinese City, one understands why. This collection of letters to Chinese president Xi Jinping and provincial governors, essays, interviews, and other advocacy pieces reveal how much Yu has invested in promoting his ecological, water-centric “sponge city” approach. His book demonstrates that every landscape architect can become a leader and a powerful force for improving environmental and human health in their community.

Yu connects the professed communal and environmental aspirations of the Communist Party leadership with his own goals — healthy places for people and well-functioning ecosystems. But he also believes there has been some deviation from the original goals of the Communist revolution, with the pursuit of Western-style, car-based development; isolated, residential skyscrapers; and widespread environmental degradation.

He submits typical contemporary urban design in China to a kind of criticism study session, asking mayors and governors to re-examine their own motivations and re-align themselves with the true needs of the Chinese people and the environment.

He takes aim at the Chinese version of the western City Beautiful movement that has been carried out “aimlessly and autocratically,” damaging both the civil realm through the development of highways that split communities, giant soulless plazas, and parks filled with non-native plants; and the natural environment, through the country-wide pollution of air and water. His core argument: to mindlessly ape Western development models — and profit from these destructive approaches — is fundamentally un-Chinese and certainly not Communist.

In one compelling essay directed to mayors, he writes: “contemporary movements to build the ‘City Beautiful’ and the ‘eco-city’ are short-sighted. It is wrong to raze old homes downtown to erect a paved concrete square; wrong to demolish natural features to build ‘parks’ stuffed with exotic plants; wrong to cut down forests that meander along riverbanks, only to line those rivers with concrete; wrong to take productive rice fields that are over a thousand years old and cover them up with lawns of imported grass — all to inflate and publicize a mayor’s false achievements.”

He seeks to grow a new stock of governors and mayors who can change the status-quo urban planning paradigm in China. He wants them to adopt a “negative planning” approach in which important ecologies are purposefully protected from development. Instead of running population growth estimates and then creating a development plan based in standardized land requirements per person, Yu wants urban planners to preserve and enhance undeveloped land — hence the “negative” or zero planning or development approach — that provide vital ecosystem services. With negative planning, China can then build “landscape security patterns,” which form out of “strategic locations and linkages” that are “extremely important to the maintenance and control of ecological processes.”

ASLA 2013 Professional General Design Honor Award. A Mother River Recovered: Qian’an Sanlihe Greenway. Turenscape / Kongjian Yu
ASLA 2013 Professional General Design Honor Award. A Mother River Recovered: Qian’an Sanlihe Greenway. Turenscape / Kongjian Yu

In a country that has become a toxic brownfield, landscape security could provide the stable foundation for the renewed sustainability and resilience of the country.

He calls for using a number of ambitious strategies for achieving landscape security, and bringing nature back to the cities in a real, not fake “eco-city” manner. Historic and cultural preservation, as well as agriculture, are woven through the ideas, too:

  • “Maintain and strengthen the overall continuity of the landscape pattern.
  • Establish and protect the city’s diversity of habitat.
  • Maintain and restore the natural configuration of rivers and shorelines.
  • Restore and protect wetland systems.
  • Integrate rural windbreaks into urban greenways.
  • Build greenways for pedestrians and cyclists.
  • Establish green cultural heritage corridors.
  • Improve urban green spaces by making them more permeable and accessible to the public.
  • Dissolve parks into the city’s matrix.
  • Dissolve the city, protect and integrate productive farmland as an organic element of the city.
  • Establish native plant nurseries.”
ASLA 2014 Professional General Design Honor Award. Slow Down: Liupanshui Minghu Wetland Park. Turenscape / Kongjian Yu
ASLA 2014 Professional General Design Honor Award. Slow Down: Liupanshui Minghu Wetland Park. Turenscape / Kongjian Yu

Amid the essays and lectures, Letters to the Leaders of China intermingles actual letters written by Yu to provincial governors, mayors, and Chinese president Xi Jinping himself. They give an insight into the opportunities and limits of Yu’s role as a leading intellectual and critic and the preeminent landscape architect in China. Unfortunately, though, Yu doesn’t provide any of their responses back to him, so these sections feel like a one-sided conversation. One doesn’t know the results of his lobbying.

Still, one letter to Wen Jiabao, premier of the state council, calling for a “vernacular heritage landscape network” — essentially, a national system of cultural landscapes that could also provide ecosystem services — is a particularly creative, efficient policy proposal that even includes specific governmental and regulatory changes to make his proposal happen. The letter shows an understanding of how the government is structured and what needs to change.

Through the letters, essays, and lectures, one gets a sense of how much Yu cares — and how driven he is to undo the unsustainable development patterns that repeat the same destructive errors made in the West over the past 50 years. He is trying to respectfully guide the leadership of China towards a more ecological, humane approach, and he works every angle he can find.

At the end of the book, there is a transcription of an interview with Chinese contemporary artist Ai Wei Wei. Ai presses Yu on his ideas, forcing him to justify his arguments. Yu states that China’s rustic, vernacular, “low culture” is what’s key to achieving sustainability — not the imported Western ideas of development, architecture, and landscape or bourgeois Chinese traditions. To achieve social and environmental reform, China must raise up what is considered low today — the wetland that functions, the productive aesthetics of the humble farm, the clean river.

ASLA 2016 Professional General Design Honor Award. Framing Terrain and Water: Quzhou Luming Park. Turenscape / Kongjian Yu
ASLA 2016 Professional General Design Honor Award. Framing Terrain and Water: Quzhou Luming Park. Turenscape / Kongjian Yu

And so he seeks to educate China’s many mayors on the beauty of what is plain, which is why his works of landscape architecture are “consciously educational.”

Medellín Is Healing Itself with Social Urbanism

Medellín, Colombia / Maria Bellalta

The Colombian civil war that began in the 1960s killed some 220,000 people and displaced another 5 million, creating one of the largest groups of internally-displaced people in history.

In a session at the ASLA 2018 Annual Meeting & EXPO in Philadelphia, Maria Bellalta, ASLA, chair of the landscape architecture department at the Boston Architectural College (BAC), said the civil war was the terrible legacy of Spanish colonialism, which created a deeply unequal economic and social system that exploited both the environment and native peoples.

Colombians displaced from their farms in the countryside and severed from the natural environment by “greed and violence” ended up in cities like Medellín. There, the chaos of government and guerilla warfare, endemic poverty and great inequality, and the legacy of environmental destruction contributed to the rise of infamous drug lord Pablo Escobar, who ruled from the neighborhoods at the outer lip of the valley that gives form to the city.

All the violence and corruption scarred not only the city but also the landscape, said Bellalta, who has been bringing her students to Medellín to see and learn for the past few years. But a decade after the death of Escobar in 1993, Medellin invented a new approach, which then-Mayor Sergio Fajardo called “social urbanism.” The goal was to use urban design — and importantly, landscape architecture — to reduce inequality and heal the environmental damage.

Fajardo “invited disregarded communities to participate in planning efforts,” which resulted in major investments in new subways, aerial tramways, bicycle infrastructure, libraries, and beautiful parks — with the majority of the new amenities created in underserved communities. Efforts to “change the social dynamic” yielded new networks of aerial trams and lengthy escalators built into steep hills. These inventive, low-cost transportation systems created new connections to the city center for the once-isolated, difficult-to-reach communities with high numbers of low-income residents. World-class libraries and green spaces were purposefully built in the places that had no parks.

Aerial trams in Medellín / The Gondola Project
España Library-Park in Santo Domingo Savio in Medellín / Royal Institute of British Architects
Botanical garden of Medellín / Flickr

The city was also smart to re-use existing infrastructure. Unidades de Vida Articulada (UVAS), which Bellalta said are equivalent to our YMCAs, were “strategically created by re-purposing existing water tanks that form part of the city’s hydraulic system.”

Bellalta noted an important public work that has also helped Medellin and Colombia heal: the Museum of Memory, a “poignant tribute to those who died or disappeared during the civil revolution.” The museum is found alongside a linear park that follows the Santa Elena stream. The park is designed to “offer relief through a magical re-encounter with nature and the cleansing attributes of water.”

Museum of Memory, stream found to the left of the museum / Juan David Botero

Lina Escobar, director of the landscape architecture program at the Universidad Pontifica Bolivariana in Medellín, further explained how the city is cleansing itself with water and nature.

Since its founding, the city has been intertwined with the Aburrá river — or Medellín river — and the Santa Elena creek, its primary tributary. “Medellín’s geography is determined by the river and tributaries that crosses the valley,” which has shaped the city’s orientation and patterns of development. In the 1940s, a 30-kilometer stretch of the Medellín river was put in a concrete channel to reduce flooding. As the population started to swell in the 1950s, the city developed around the river.

Medellín River / School of Landscape Architecture, Boston Architectural College
Medellín River / Maria Bellalta

Then in 2014, Medellín city government launched an international design competition to envision a new Medellín River Park (Parques del Rio). The competition asked firms to create a master plan for the entire length of the river as it cuts through the city and then focus in on the central zone — the 9-kilometer stretch through the core of the city.

Medellín-based firm Latitude beat out the competition with their concept for a “botanical park that recovers connections to water systems through a revitalized biotic metropolitan corridor.” The park developers will take parts of the concrete channel out, bury an adjacent highway, and create a new, lush green spine, with tendrils spreading throughout the valley.

Medellín River Park / Latitude
Medellín River Park / Latitude

Escobar said the new park, which is now in development, is not only a “new ecological structure for the region, but also re-frames people’s relationships with each other and nature after years of conflict.”

Medellín River Park / Latitude

Daniela Coray, who was a graduate student of Bellalta’s at BAC, said there are so many other opportunities to heal the rupture between city and nature. Her master’s thesis project looked at ways to restore the polluted Santa Elena stream, particularly near the emotionally-resonant Museum of Memory. “The stream holds the memory of geographical and social divisions that could begin a process of healing.”

Through an interesting aside that took us out of Medellín, Ken Smith, FASLA, founder of Ken Smith Workshop, related how principles of social urbanism could be applied at the landscape-scale in other cities. He “deliberately engineered” the East River Waterfront Esplanade in Manhattan for social interaction through inventive “social seating,” a dog park, and meandering paths that force people to see each other. “The paths curve because it’s impossible to meander in a straight line.”

East River Waterfront Esplanade / Ken Smith Workshop

The important but unspoken message was that the smart design strategies of social urbanism need to be more widely applied around the globe.

A New Vision of Coastal Resilience

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Structures of Coastal Resilience / Island Press

Structures of Coastal Resilience, a new book by landscape architect Catherine Seavitt Nordenson, engineer Guy Nordenson, and architect Julia Chapman, draws on years of research in design, art, policy, and engineering to argue for a new vision of our coasts. As an analysis of trends in representation, mapping, and coastal design work, the book more than justifies its existence. But it is the thought paid to the evolution of these subjects over time that affords the reader a new view of coasts and establishes Structures as a significant contribution to the body of research on coastal resilience.

Architecture critic Michael Kimmelman writes in the book’s introduction that “there is no bigger challenge today than the management of coastal ecologies.” Landscape architects have laudably embraced this challenge and the attendant challenges of environmental and social justice, with no more recent and prominent national example than the Resilient by Design: Bay Area competition. Structures’ authors have concerned themselves with questions of coastal resilience for over a decade — and much of their own design work is featured in the book. The resulting research spans ecology, policy-making, engineering, and design, all of which contribute the physical and institutional structures of resilience.

For someone unfamiliar with the topic of resilience or wondering why the treatment of our coasts needs addressing, the authors’ premise is clear. Our attitude toward the coast has generally been to seek steady conditions. But ecological resilience theory, along with our own observations of this centuries’ worst flooding events, proves that the steady state is a myth. Ecosystems are in constant flux between states. Our coastal works should reflect this reality, with design leading the way.

In order to do so, landscape architects must learn how to better represent the dynamism of the coast. Historically, landscape architects, engineers, and cartographers have relied on motifs of the hydrological systems as static, with a defined line between water and land. This in turn has contributed to our proclivity for sea walls and levees for flood defenses.

Dynamic representations suggest and inspire dynamic treatments of the coast. The authors mine recent history for examples of dynamic representation, from Harold Fisk’s Map of Ancient Courses of the Mississippi River Belt to coastal section drawings produced by landscape architects Anu Mathur and Dilip da Cunha. These drawings do away with the water/land boundary in favor of a gradient of conditions that shifts and pulses over time.

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A portion of sectional sketches through gradients along the Fall Line in Virginia. Each section illustrates the diverse transitions from water to land, and from high ground to low ground, in the region. / Anuradha Mathur and Dilip da Cunha, University of Pennsylvania, Island Press

The authors provide a rich exploration of that gradient, its qualities and potential, in the chapter “Reimagining the Floodplain.” As they do with the subject of each chapter, the authors trace the history of ideas and attitudes towards the floodplain and evaluate new methods for engaging it as a site of design. The ideas profiled are speculative within reason, such as landscape architects Michael Van Valkenburgh, FASLA, and Rosetta Elkins’ coastal forests for Narragansett Bay, which faces issues of coastal flooding and saltwater intrusion. The strategy for increasing  resilience varies along the bay’s length, but generally relies on the planting of forests and shrub lands that attenuate high winds, reduce erosion, and shield community assets.

The strategies Van Valkenburgh and Elkins employ also involve moving community assets out of the floodplain. This strategic retreat from the coast will become more common as climate change exacerbates flood events. The authors also describe a strategy of adaptation through vertical retreat, which sees the lifting of buildings and critical infrastructure above the floodplain and, in phases, replaces lots and alleys with a system of canals and protective wetlands. Such strategies will have to be considered on a case-by-case basis, but what emerges out of the book is a portfolio of ideas and novel thinking that one can imagine being adapted to certain contexts.

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“Amphibious Suburb” proposal for Chelsea Heights, a back-bay neighborhood of Atlantic City and a former salt marsh transformed by urban development. Phased future development would elevate roads and homes, create canals and wetlands, and construct protective edges. / Paul Lewis, Princeton University School of Architecture, Island Press

In the last couple of decades, the democratization of visualization technologies and data have helped to dissolve the boundaries between the disciplines involved with coastal resilience. This has provided landscape architects with exciting new ways of engaging with and designing for coastal environments. Using hydraulic modeling, bathymetric and topographical information, and environmental data, landscape architects can rapidly image an environment and the impact of proposed design interventions on that environment.

One crude example of this is the water tank model, which the authors used to evaluate a proposed intervention in Palisade Bay. While the method isn’t specific to the bay, the authors were able to design a series of wave-attenuating land forms, visualizing their effect on the Bay’s hydraulic conditions. The authors evaluate the impact of these and other technologies throughout the book.

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A water tank model allows experimentation, facilitating testing of the interaction of new landforms with current, tide, and storm surge. / Guy Nordenson, Catherine Seavitt, and Adam Yarinsky, On the Water: Palisade Bay, 2010, Island Press

Structures of Coastal Resilience is an excellent collation of current design research and trends related to our coasts. And through historical analysis, ecological research, and an exploration of representation, the book suggests new ways of seeing and responding to the opportunities our coasts provide.

Resilient Design for Low-Income Communities

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Resilience for All / Island Press

In her new book Resilience for All: Striving for Equity through Community-Driven Design, author Barbara Brown Wilson seeks to confront the failings of traditional planning and design practices in vulnerable low-income communities. While others have pursued landscape-based solutions to this issue — think community gardens — Brown suggests there is a larger role for landscape architecture and urban design in resilient, equitable community development.

The communities featured in Resilience for All struggle with many of the same afflictions: environmental injustice, neglect, and lack of resources. These are vulnerable communities that face high exposure to economic and environmental shocks and disinvestment. Landscape and urban design improvements are relatively cheap, widely-accessible method of addressing these issues. Green infrastructure and streetscape improvements figure prominently in the book’s many case studies.

Importantly, Brown believes there is a fundamental relationship between social and ecological systems that, when leveraged, benefit both communities and their environments.

Consider the case of Cully, a low-income, ethnically diverse neighborhood in Portland, Oregon, that suffers from flooding streets, a lack of sidewalks, and languishing parks. Gentrification is also making its inroads.

Ordinarily, progress on the infrastructure front might invite gentrification. But a neighborhood coalition of community members and non-profits has made a point of linking infrastructure goals with wealth-building and anti-displacement goals. This means new parks associated with new affordable housing, construction on these projects performed by community members, and training provided by community organizations. This holistic approach has led to notable successes by Cully’s residents.

As Brown writes, green infrastructure improvements provide economic and health benefits. It’s logical to ensure those benefits serve communities directly and in as many ways as possible. Brown calls this approach “green infrastructure as antipoverty strategy.”

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Cully residents at work in the community garden / Barbara Brown Wilson

Resilience for All shows community development progress comes in phases, with one success usually priming the next.

In the neighborhood of Denby in Detroit, the local high school worked with non-profits to introduce urban planning and city improvements into the senior class curriculum. Students, concerned with local crime, initially set their sights on getting a nearby abandoned apartment building torn down. They aggregated resident organizations into the Denby Neighborhood Alliance and adopted a vision to target blight on a larger scale. They and thousands of volunteers combined efforts to board up vacant homes and reduce blight on more than 300 city blocks and used this cleanup effort to install wayfinding artwork and planter boxes to mark new safe routes to Skinner Playfield, their revitalized school playground.

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“Safe Routes to School” planter box at Skinner Playfield. / Barbara Brown Wilson

Landscape improvements did not come to these communities without considerable effort and without help from a network of friendly actors. And the projects often operate on a humble scale.

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Skinner Playfield network map. This diagram shows the variety of organizations Denby high school students worked with to achieve their desired outcomes. / Barbara Brown Wilson

Each case in Resilience for All represents innovation and progress for the communities and is fleshed out by a mix of empirical research and Brown’s own analysis to paint a picture of what worked, what didn’t, and how those lessons might be absorbed and applied elsewhere. Resilience for All is also bookended by two useful sections: a brief history of community-driven design and an encapsulation of the case studies’ lessons.

Resilience for All is a useful handbook for landscape architect’s wondering how their skill sets might apply to community-led planning and design. It demonstrates how landscape can be a powerful resource for vulnerable communities. And it also shows how communities can positively impact landscapes.

Rotterdam Redesigns Itself to Handle More Water

Port of Rotterdam / Wikipedia

Rotterdam in the Netherlands is the largest port in Europe. This 800-year-old city, which has a population of 630,000, is split into north and south sides by the River Nieuwe Maas. While the river is a major asset, it also increases vulnerability to climate change as sea levels rise. In a session at the ASLA 2018 Annual Meeting in Philadelphia, Dutch government officials, landscape architects, and planners discussed efforts to adapt Rotterdam and the rest of Holland to new realities.

After flooding in the early 1950s killed some 1,800 people, the Dutch were determined this would never happen again. According to Tim Van Der Staaij, a resilience officer with the Rotterdam city government, the country created a multi-layered system of “delta works” — a series of dikes, polders, and sluices to defend land against water. This system made Rotterdam, most of which is 6-7 meters below sea level, and its port possible.

But in recent years, climate change has made the intricate system that protects Rotterdam vulnerable. Van Der Staaij said the water management system has become “more unpredictable due to sea level rise, river discharge, groundwater rise, and excess rainfall.”

Given the city is already below sea level, Rotterdam has taken the approach that “we must accept the water; it’s better than fighting.” Once that conclusion was reached, city leaders saw an opportunity to redesign the city as part of a new Rotterdam resilience strategy, a set of “holistic, multi-level, multi-stakeholder” approaches.

In the past few years, the Dutch have invented new ways to “accept water,” including the water square by landscape architecture firm De Urbanisten, which is usually a public plaza with basketball court, but in extreme rain events becomes a temporary water storage space that “holds the water while the sewage system is over-taxed and then lets the water go later.”

Water plaza / Rotterdam Resilience Strategy

Van Der Staaij said the city is now working on redesigning all public spaces to store water, including the new central station now in development. As part of this, Rotterdam has invested heavily in putting all that water to good use through its “water sensitive city” program, which invests in green roofs, tree planting, street-level gardens, and new green “tidal parks” along the river.

Water sensitive Rotterdam / Urban Green-Blue Grids

Han Dijk, an urban planner working with the city on its resilience plans, highlighted the tidal parks along the Nieuwe Maas — also to be designed by De Urbanisten — as central to creating a Rotterdam that can bounce back from repeated flooding. “The city will build new land with fill, soften the river’s coasts, and open up and connect islands.”

Proposed tidal park in Rotterdam / De Urbanisten, Rotterdam Climate Initiative

And Gerda Roeleveld, a landscape architect with Deltares, a independent research institute, explained how the Netherlands has invested in 3D simulated models to help local policymakers, planners, and designers — as well as the general public — understand the potential impacts of climate change.

She showed off some sophisticated animations that visualize climate impacts, including the distribution of water — from the national to the site-levels. A set of these adaptation support tools, based in real-time data, are supporting Dutch communities in their efforts to devise new climate resilience and adaptation strategies, which they obligated to create by 2019.

Climate resilience planning tool / Deltares

Learn more about Rotterdam’s resilience and adaptation strategy.

Experience Brooklyn Bridge Park in Virtual Reality

ASLA 2018 Professional General Design Award of Excellence. Brooklyn Bridge Park, Brooklyn, NYC / Alexa Hoyer

Experience Virtual Reality! Immerse yourself in Brooklyn Bridge Park in New York City, which won the ASLA 2018 Professional Award of Excellence in General Design. Explore this unique park built in part over abandoned piers, guided by landscape architect Michael Van Valkenburgh, FASLA, president and CEO of Michael Van Valkenburgh Associates, Inc.

Viewing Options

Option 1: Watch a 360 Video on YouTube

If you are on your phone reading this page, simply click on this URL and watch it in your YouTube mobile app: https://www.youtube.com/watch?v=nQ2geeXMThI (please note that this video will not work in your mobile browser)

Be sure to turn around while watching so you can see all angles of the park!

Or if you are on a desktop computer, go to https://www.youtube.com/watch?v=nQ2geeXMThI using your Chrome browser.

Go to settings and set the resolution to 2610s.

Use the sphere icon to navigate through the park! Note: the 360 video will not work in Firefox or Internet Explorer.

YouTube 360 on mobile / YouTube
YouTube 360 on mobile / YouTube

Option 2: Watch a 3D 360 Video on Samsung Gear VR

If you own a Samsung Gear VR headset and compatible Samsung phone, go to Samsung Gear via the Oculus App and search for “Brooklyn Bridge Park” or “ASLA” to find our video.

Samsung Gear VR / Samsung
Samsung Gear VR / Samsung

Why Brooklyn Bridge Park?

ASLA selected Brooklyn Bridge Park because it won the ASLA 2018 Professional General Design Award of Excellence. Less than one percent of all award submissions receive this honor.

Our esteemed jury, made up of leaders in the field, described Brooklyn Bridge Park this way: “The plan allows for and encourages different experiences in the different spaces, from being wide open and being fully engaged with the people around you to intimate, forested places. It’s remarkable.”

The award also highlights Brooklyn Bridge Park because it’s a prominent example of how to transform abandoned post-industrial waterfronts into spaces for people and wildlife. These spaces litter cities and represent so much untapped potential.

Brooklyn Bridge Park VR / ASLA
Brooklyn Bridge Park VR / ASLA

Why Virtual Reality?

The communications world is increasingly image- and video-driven. With video, you can pack in even more information about a work of landscape architecture, much more than you can in simply a photo or text. With video, you can get a sense of the sight, sound, and “feel” of a place. You can see people interacting with the design, bringing it to life.

Virtual reality takes video to the next level. As you move your phone or VR headset, you control your experience in the landscape. It more closely mimics the experience of exploring a place in person. In part, it recreates that sense of discovery one gets in real life.

Why did ASLA make this VR film?

Virtual reality has proven to be a powerful tool for explaining how the places people love – like Brooklyn Bridge Park – are designed experiences. Virtual reality can educate the public about landscape design in a compelling way.

The video has multiple goals: promote the potential of virtual reality among the landscape architecture community, which totals approximately 25,000 design professionals in the U.S. and Canada; explain the incredible value of landscape architecture to the public; and demonstrate the ability of landscape architects to turn an unloved place like a cut-off, post-industrial waterfront into a beloved community park.

Why should landscape architects use VR?

Virtual Reality is a powerful tool for landscape architects, architects, planners, and developers – really anyone involved in designing our built and natural environments. In the example of Brooklyn Bridge Park: many will never have the opportunity to visit the park in person, but with our video, they can get a good sense of what’s it like to be there.

For landscape architecture firms, this is an excellent way to really show clients that a place they’ve designed works – that people enjoy hanging out there, that kids love playing there, that people are drawn to events there.

ASLA VR Film Credits

Producer: American Society of Landscape Architects (ASLA)
Production Company: DimensionGate, Toronto
Director: Ian Tuason
Director of Photography: Ian Tuason
Production Assistants: Ward Kamel and Idil Eryurekli
Narrator: Michael Van Valkenburgh, FASLA, President and CEO, Michael Van Valkenburgh Associates Inc.
Post Production: Callum Wilkin Gillies

Thank you to Jamie Warren and Onika Selby at Brooklyn Bridge Park for making this all come together. At Michael Van Valkenburgh Associates, Inc, we appreciate the kind assistance of Michael Van Valkenburgh, FASLA, Hilary Archer, Jane Lee, and Lucy Mutz.

Parks Are a Critical Solution to Climate Change

PS 15 The Roberto Clemente School in the East Village neighborhood of Manhattan, a “state of the art green infrastructure playground” / Maddalena Polletta, The Trust for Public Land

Parks boost community resilience because they offer a place to develop deeper neighborhood connections. They improve community health by reducing stress, restoring cognition, and providing a place to exercise. Parks mitigate the urban heat island effect, improve air quality, and absorb carbon from the atmosphere. They support local biodiversity and can act as buffer zones for flooding or mudslides. Parks are both important social and environmental infrastructure.

To sum it up: “we need more parks if we want our cities to be more resilient to climate change,” said Joshua Alpert, director of special projects for C40, at an event organized by The Trust for Public Land and JBP Foundation during the Global Climate Action Summit in San Francisco.

“We need public space if we want to know our neighbors,” explained Joshua Stanbro, with the city and county of Honolulu, Hawaii. Parks are the “platform for social interaction,” but if designed and built with the community, they can also help forge stronger community connections.

Those connections are more likely to happen in parks that communities actually want. So it’s important that “we meet communities where they are,” said Diane Regas, president and CEO of The Trust for Public Land.

In New York alone, The Trust just built their 200th green schoolyard in an effort to build social networks so these communities can then better fight for climate equity.

Regas said some one-third of the population of the US doesn’t have a park within a 10-minute walk. Through their innovative 10-minute walk campaign, The Trust and its partners aim to undo that inequity.

Brady Walkinshaw, CEO of Grist, said the campaign is the kind of clear, simple communication that is needed because it successfully distilled complex urban planning ideas into an easy-to-understand message people can get behind, like the $15-an-hour minimum wage movement.

Urban parks are also important because they provide the foundation of urban forests, which help cities both mitigate carbon emissions and adapt to a changing climate. According to Jad Daley, CEO of American Forests, urban forests absorb some 100 million tons of carbon each year, about 2 percent of global greenhouse gas emissions. Trees found in these green areas can reduce energy use up to 7 percent because they provide wind blocks for homes in the winter and cooling in the summer.

In an effort to achieve equity, American Forests is now working with vulnerable urban populations to plant millions of trees. Daley said this work is more critical than ever because deaths from extreme heat are expected to increase ten fold by 2050.

Arturo Garcia-Costas, program officer for the environment with the New York Community Trust, said a more connective approach needs to be taken with green spaces in cities. He pointed to the Ramblas in Barcelona and the High Line in New York City as examples. “We need to think of the broader system and greater connectivity, with green space as the priority.”

Ramblas, Barcelona / Wikipedia

Nancy Somerville, Hon. ASLA, CEO of the American Society of Landscape Architects (ASLA), said ubiquitous “pave the planet” approach to development hasn’t been “healthy or climate-smart.” In fact, the approach make communities even more vulnerable to the impacts of climate change. To increase safety, communities must instead create built environment systems that work in concert with natural systems. This is because “we are never going to tame Mother Nature.”

As an example, she said there is a great opportunity to design parks — and cities more broadly — to act like natural sponges that absorb stormwater. The great additional benefit of this green infrastructural approach: “It’s a much healthier system.”

ASLA 2009 Professional General Design Award of Excellence. Buffalo Bayou, Houston, Texas, SWA Group / Bill Tatham

But Somerville also called for better science and data-based models in order to optimize design interventions in cities. With more accurate data-based geographic models and maps, policymakers can understand where the worst urban heat islands are, the most flooding is, the areas most impacted by mudslides, and then create the most effective parks that solve those challenges. “The lack of modelling remains a key gap.”

In comments on the session, landscape architect Mia Lehrer, FASLA, CEO of Studio-MLA, noted that in dense cities, the only remaining spaces that can be turned into parks are brownfields. Remaking those contaminated spaces is a “complicated and expensive process” that requires expert landscape architects.

Adrian Benepe, Hon. ASLA, senior vice president at The Trust for Public Land and former head of NYC Parks and Recreation, agreed, arguing that “landscape architects are system thinkers” who can help communities maximize park benefits.

Lehrer, Alpert, Somerville, and Walkinshaw saw further densification as a critical future challenge for cities. Walkinshaw said: “densification is the cause of most fights in cities, as it brings up racial, civil rights, public space, and climate issues.”

Alpert believes green public space in the ultra-dense mega-cities of the near-future may end up being dis-aggregated into networks of not only parks but also rooftops and terraces, wherever space is available.