Stormwater Master Class Series at Forester University Expands

Jeffrey L. Bruce FASLA is now teaching Fundamentals of Green Infrastructure for the Post-Construction Stormwater BMPs Master Class Series at Forester University.

http://www.foresteruniversity.net/masterseries-postconstruction-Stormwater-BMPs.html

Green Roof Ecosystems

JBC is please to announce a great new technical resource for green roofs compiled by Richard Sutton. Here's the forward we wrote for the book:

Foreword

Ralph Waldo Emerson once wrote: “The creation of a thousand forests is in one acorn.” Let the knowledge, concepts and theories contained in this book be the acorn that inspires thousands of professionals to advance the technical performance of green roofs. For far too long, green roofs have been misunderstood and over simplified in terms of ecological performance. The challenges to creating diverse and resilient systems in our anthropogenic urban environments are well recognized. Due to weight, cost and loading restrictions, green roofs attempt to compress biological and ecological function into the narrowest of profiles, limiting natural processes and nutrient cycles.  In response to these constraints the industry has evolved to simplistic low diversity solutions which provide less ecological services than what is possible in the urban fabric of our cities where these benefits are in greatest need.

Today’s urban footprint is composed of more than twenty percent roof cover. This vast urban land cover provides an immense opportunity to solve many of our environmental concerns, especially if we convert these spaces to integrated and highly functioning living architecture. E. O. Wilson the noted American biologist and theorist stated: “We should preserve every scrap of biodiversity as priceless while we learn to use it and come to understand what it means to humanity”. Furthermore, we should endeavor to create biodiversity on every surface of our cities, as it helps to fulfill the basic needs of humanity.

Despite the efforts of many within the green roof industry, roofs for the most part remain under-utilized, forgotten places with exceptional opportunities to be reclaimed and repurposed as vibrant, functional centers of nature and human enjoyment. As a green infrastructure tool, green roofs provide some of the highest quality eco-services benefits available for solving a multitude of social and environmental ills, despite the fact they are too quickly dismissed early in the design process because of a lack of understanding of their potential. Greater knowledge about Green Roof Ecosystems will only increase implementation of this vital and natural solution.

Recently a renewed interest in landscape planning seeks to link ecological services and community needs. And increasingly, public policy recognizes that creating livable and healthy communities requires connected landscapes in order to provide for clean air, clean water, public fitness, wildlife diversity and ecological benefits. The natural capital in our cities and efforts to restore it need not be considered at a single site or scale. Rather, natural ecology needs to be assessed and restored across scales. Widespread implementation of green roof technologies can set a foundation for mitigating and reversing environmental deterioration of the Anthropocene, as well as, dramatically broadening our response by providing new ways of thinking about ecological restoration. This process will be greatly enhanced by an interdisciplinary team approach to validate the robustness of the approaches underlying the restoration of ecosystem processes.

Green Roofs for Healthy Cities established the Journal of Living Architecture in order to identify the state of the art in green roof and green wall research, to identify the best in class, and share these findings with as many professionals as possible.  This book represents a seminal compilation of research and technical knowledge about green roof ecology and how functional attributes can be enhanced. Written by over twenty leading experts and researchers in the field of green roofs, the narration covers in detail a number of important topics rarely discussed. While documenting current research, trends and theory, this book delves further to explore the next wave of evolution in green technology, defining potential paths for technological advancement and research.

This effort represents an informed and progressive way of approaching our environmental response to urban design.  It makes a compelling case that the long-term health and viability of our communities depend upon highly functioning green roof ecologies that connect green spaces to create a resilient tapestry of natural diversity spanning the urban landscape. Green Roof Ecosystems will be an invaluable reference for individuals who have the desire to implement ecologically conscious green roofs, such as planners, policy makers, agencies, and professionals who have substantial interest in designing them. (i.e.; landscape architects, ecologists, engineers, architects, biologists, and other holders of environmental knowledge). Ecological intelligence expands the context of life as it enlarges who we are as a person, and this book provides a wealth of intelligence for those interested in the topic of green roofs.

Jeffrey L. Bruce, FASLA, LEED, ASIC, GRP

Kansas City, MO

http://www.springer.com/it/book/9783319149820

What a Park’s Design Does to Your Brain

AP Photo/Julie Jacobson

 As a student in Poland, Agnieszka Anna Olszewska was fascinated by the way that some landscapes seemed to be more contemplative than others. She wanted to research the reasons behind that calming effect, but she found little encouragement. “People told me I can write a novel, I can write a poem about the contemplativeness of landscape, but not a scientific paper.” One well-respected landscape architect told her it couldn’t be done because of the diversity of human responses: Some of us might find a garden conducive to contemplation; others might prefer the bathroom.

But Olszewska, now a doctoral candidate in landscape architecture and urban ecology at the University of Porto in Portugal, persevered. With a neuroscience professor at the university, she conducted a pilot project that culminated, earlier this year, in a conference paper titled “Urban Planning, Neurosciences and Contemplation for Improving Well-being in Our Cities.” It combined questionnaire results with measurement of brain waves in an effort “to prove that there are certain characteristics of urban parks and gardens that can induce in the visitor the pattern of brain activity that is associated with contemplative or meditative states.”

We know that cities can be hectic, stressful places. We also know that green space can have a calming effect on people. But Olszewska is seeking to take our knowledge a step further — to enable designers and planners to maximize the serenity of urban green refuges.

In the study, four design experts examined 50 photographs from three urban parks in Portugal and France. The experts were also given a checklist of design features (such as long-distance views, biodiversity, “canopied,” “panoramic”). They identified which features appeared in each photograph, and also evaluated each setting’s contemplativeness. The settings deemed most contemplative had panoramic vistas with long-distance views (more than 400 meters). They tended to include large empty spaces, natural asymmetry, clearings and stimulation to look at the sky. The least contemplative settings, by contrast, usually lacked these features, and instead had characteristics such as paths and enclosed spaces (as in small pocket gardens).

In the second part of the project, subjects were asked to look at the 15 photos of landscapes ranked highest by the experts for contemplativeness. Their brain waves were recorded by electroencephalography (EEG) during this task. The brain activity, Olszewska said, was similar to patterns known to be associated with mindfulness achieved through meditation. She stresses, though, that her research is quite preliminary; subjects weren’t shown the least contemplative spaces. (She is currently working on a study that includes this kind of control group.)

The most contemplative landscapes are not necessarily the ones that people would claim to enjoy the most. More stimulating landscapes — brightly colored flowers, numerous eye-catching elements — may be more immediately attractive. “If you imagine the French baroque gardens, they are very geometrical, very organized,” said Olszewska. But this kind of environment, however beautiful, may be less relaxing to spend time in.

This is not to say that the opposite extreme — wild landscapes — are necessarily more contemplative. Olszewska thinks we tend to find those overwhelming. Instead, she hypothesizes that the ideal is a “golden middle” between too much design and too little.

The small experiment is part of a larger, nascent movement to try to connect neuroscience to architecture and design. The movement for “evidence-based design” originated in the health care field. One famous finding was that in hospitals — historically not the most pleasant places — surgical patients whose windows faced natural outdoor scenery were discharged sooner and requested fewer painkillers than patients whose windows faced a brick wall. Inspired by this movement, others began to think that there was no reason to limit such thinking to hospitals. It spread to schools, and now, increasingly, the built environment and urban green spaces. Some researchers began to incorporate neuroscience. Much of the interest is focused on contemplativeness. Perhaps, just as hospitals need healing spaces, cities need serene oases to counteract the urban chaos.

Julio Bermudez, an associate professor of architecture and planning at the Catholic University of America, studies how the built environment can induce states of relaxation and mindfulness. In one study, which he presented last week at the second annual conference of the Academy of Neuroscience for Architecture, architects looked at photographs of buildings designed to be contemplative, including the Salk Institute in San Diego and the Pantheon in Rome, as well as ordinary buildings. The contemplative buildings reportedly elicited “markedly distinct” responses, as measured by functional Magnetic Resonance Imaging (fMRI). Bermudez and his co-authors (including a neuroscientist at the University of Utah) concluded that contemplative buildings “allow subjects to enter into a meditative state with diminishing levels of anxiety and mind wandering.”

In an email, Bermudez speculated about some common features of contemplative design: buildings that frame nature in some way; that exhibit simplicity without being simplistic; and that offer a sense of separation from the rest of their context, among other qualities. Some “remarkable cities,” he wrote, “naturally invite contemplative states.” As examples, he cited Santiago de Compostela in Spain and Bodh Gaya in India, as well as parts of Paris, Washington D.C. and San Francisco.

It may be true that, as the landscape architect warned Olszewska, it’s hard to make blanket generalizations about what people find contemplative, and responses may vary culturally too. It’s also notoriously challenging to interpret brain waves conclusively, and this research is in its infancy. But both Olszewska and Bermudez believe there are certain common features that can broadly foster these meditative responses. And rather than write poems, they hope to prove it with the tools of fMRI and EEG.

The Science of Cities column is made possible with the support of the John D. and Catherine T. MacArthur Foundation.

Rebecca Tuhus-Dubrow is a columnist for Next City. She has also written for the New York Times, Slate and Dissent, among other publications.

 http://nextcity.org/daily/entry/city-parks-design-calming-brain

Three Perspectives on Designing Resilient Cities

Hurricane Sandy has changed the national conversation on climate change. Unlike Hurricane Katrina, which much of the country was happy to pin the blame for on New Orleans itself (“they shouldn’t have built there in the first place!”), Sandy revealed climate change to be a growing threat to nearly all coastal settlements. Formerly abstract warnings of growing inundation risk, stemming from rising sea levels and increasing storm frequency, suddenly became concrete and impossible to ignore. A new found sense of vulnerability descended on coastal cities. In this light, urban design cannot be dismissed as merely a luxury or an aesthetic consideration. The discipline has taken on a new relevance and sense of urgency: cities, particularly in coastal settings, must reconsider their built form in order to adapt to radically altered environmental conditions. Three new books by Island Press approach these issues with renewed sense of the value of the urban design.

Entertaining and attractively designed, Alexandros Washburn’s The Nature of Urban Design: A New York Perspective on Resilience provides a fantastic introduction to the discipline of urban design for non-designers. Washburn, the chief urban designer for New York City, uses that city as case studies to explain what exactly urban designers do and why it matters. He broadly defines urban design as “the art of changing cities, guiding growth to follow new patterns that better meet our challenges while improving our quality of life.” Of course, perhaps the biggest challenge facing cities today is climate change, and The Nature of Urban Design uses Hurricane Sandy to illustrate the need for adaptation, and how urban design can act as an agent of change.

Washburn includes the suburbs in his definition of the city, stating that the suburbs simply represent low-density cities, thus breaking down the false city/suburb dichotomy. Washburn’s inclusion of the suburbs is important because it allows him to expand the purview of urban design beyond the city center to the entire metropolitan area. Urban design isn’t about recreating a single notion of what the city is, but instead about adaptation and improving living conditions, regardless of location within the metropolitan region. Instead of seeking a rigid urban design toolkit, Washburn asks, “Is there a form of the city that can survive new extremes of weather, that can accommodate millions more citizens in dignity and prosperity, that can avoid contributing more to climate change, and still be worth living in?”

He methodically walks us through why urban design matters, how urban designers work, how urban design can be a catalyst for transformation (using the High Line as a case study), and how it can lead to resilience in the face of climate change. He discusses two strategies for resilience: mitigation and adaptation. Mitigation means reducing greenhouse gases in order to prevent adverse climate change, while adaptation involves reducing vulnerability to projected climate change. With a certain degree of environmental change now inevitable and a dramatic, global reduction in greenhouse gas production seeming less and less likely, Washburn’s approach to resiliency is both idealistic and practical.

Like Washburn’s book, The Hidden Potential of Sustainable Neighborhoods: Lessons from Low-Carbon Communities, by Harrison Fraker, uses global climate change to frame the new importance of urban design. Unlike Washburn’s broad overview of the profession, however, Fraker’s is more narrowly focused, using four European case studies to dig into the specifics of several low-carbon urban design projects. Fraker describes how sustainability issues such as energy efficiency have historically only been considered on the building scale. The neighborhood scale, however, represents new opportunities for carbon reduction. Fraker argues that the neighborhood scale has the “potential to integrate the design of transportation, buildings, and infrastructure while engaging the design of the public realm as part of the system.” He refers to this as a “whole-systems approach,” where all urban systems are considered together, greatly expanding the potential for resiliency.

 The Hidden Potential of Sustainable Neighborhoods is about mitigation, citing examples of low-carbon urban design projects. This does not mean, however, that Fraker is merely presenting a series of utopian designs. Each of the examples in the book is actually built, and Fraker looks back at commonalities between each project’s implementation and subsequent performance. Furthermore, he applies the lessons learned from the four European examples to sprawling, patchwork American urbanism, describing the potential for infill opportunities. Fraker could have spent more time addressing how to retrofit existing development rather than concentrating on new development. Still, as he states, new models can catalyze paradigm shifts, and we should appreciate his effort to translate European lessons to messy American cities.

If The Nature of Urban Design is a layperson’s introduction to urban design, and The Hidden Potential of Sustainable Neighborhoods is a case-study resource for urban designers, The Guide to Greening Cities, by Sadhu Aufochs Johnston, Steven S. Nicholas, and Julia Parzen, is probably of most interest to urban planners. Like the other two books, The Guide to Greening Cities lays out the challenge of designing cities in the face of climate change. Johnston and his co-authors also refer to Hurricane Sandy, as well as other climactic events, to establish the new urgency of resilient city design.

 Instead of studying the design of resilient cities, however, Greening Cities explores how city leaders can implement new sustainability projects. Johnston and team state that the book is “written from the perspective of green city leaders and champions who are working inside city governments in North America and who have succeeded in pushing forward innovative green projects.” Rather than emphasizing the design of sustainability, Greening Cities walks through how city leaders can make a case for, fund, implement, and subsequently monitor green projects. In this way, The Guide to Greening Cities is a useful book for urban planners wishing to increase the resiliency of their communities.

Cities are now faced with the task of both adapting to inevitably changing environmental conditions and minimizing their contributions to future climate change. The political, economic, environmental, and technological challenges associated with this task are bewilderingly complex. However, recent events such as Hurricane Sandy have shown inaction to be an increasingly tragic prospect.

The complexity of designing for urban resilience requires a broad cultural shift across many different disciplines. These three books address the same problem of designing in the face of global climate change, but do so for different audiences – the general public, urban designers, and urban planners. With the consequences of global warming no longer abstract, hopefully the sense of urgency that inspired these books will not abate.

http://dirt.asla.org/2013/11/06/three-perspectives-on-designing-resilient-cities/

63 Trillion Gallons of Groundwater Lost In Drought

 

The ongoing drought in the western United States has caused so much loss of groundwater that the Earth, on average, has lifted up about 0.16 inches over the last 18 months, according to a new study. The situation was even worse in the snow-starved mountains of California, where the Earth rose up to 0.6 inches.

Researchers from UC San Diego’s Scripps Institution of Oceanography and the U.S. Geological Survey estimated the groundwater loss from the start of 2013 to be 63 trillion gallons — the equivalent of flooding four inches of water across the United States west of the Rocky Mountains.

The study, published online Thursday by the journal Science, offers a grim accounting of the drought’s toll.  “We found that it’s most severe in California, particularly in the Sierras,” said coauthor Duncan Agnew, professor of geophysics at UC San Diego’s Scripps Institution of Oceanography. “It’s predominantly in the Coast Ranges and the Sierras showing the most uplift, and hence, that’s where we believe is the largest water loss.”

A pre-dawn glow illuminates a narrow, shallow meandering stream flowing in San Gabriel River's East Fork in the Angeles National Forest, which reveal the effects of the prolonged drought March 12, 2014.

That’s also about how much ice is lost from the Greenland ice cap every year from global warming. Scientists came to this conclusion by studying data collected from hundreds of GPS sensors across the western United States, installed primarily to detect small changes in the ground due to earthquakes.

But the GPS data can also be used to show very small changes in elevation. Groundwater is very heavy, and its weight depresses the Earth's upper crust. Remove the weight, and the crust springs upward — and GPS sensors can detect how much higher the land has risen as a result of loss of groundwater. 

Severe drought conditions are evident as a lone houseboat is dwarfed by steep banks that show the water level down 160 feet from the high water mark at Lake Oroville on June 21, 2014. Receding water levels are revealing prehistoric and historic artifacts such as bedrock mortars and projectile

The highest uplift of the Earth occurred in California’s mountains because there is so much water underneath them, Agnew said. The uplift was less in Nevada and the Great Basin.

“You can only lose water where there’s water to lose,” Agnew said. According to the study, data showed the period of land lifting up as beginning in 2013, and continues to this day.

http://www.latimes.com/local/lanow/la-me-ln-63-trillion-gallons-of-groundwater-lost-in-drought-study-finds-20140821-story.html

Drinking Water Out of Thin Air

One Warka Water tower can supply more than 25 gallons of water throughout the course of a day.

 

In some parts of Ethiopia, finding potable water is a six-hour journey.

People in the region spend 40 billion hours a year trying to find and collect water, says a group called the Water Project. And even when they find it, the water is often not safe, collected from ponds or lakes teeming with infectious bacteria, contaminated with animal waste or other harmful substances.

The water scarcity issue—which affects nearly 1 billion people in Africa alone—has drawn the attention of big-name philanthropists like actor and Water.org co-founder Matt Damon and Microsoft co-founder Bill Gates, who, through their respective nonprofits, have poured millions of dollars into research and solutions, coming up with things like a system that converts toilet water to drinking water and a "Re-invent the Toilet Challenge," among others.

Critics, however, have their doubts about integrating such complex technologies in remote villages that don't even have access to a local repairman. Costs and maintenance could render many of these ideas impractical. "If the many failed development projects of the past 60 years have taught us anything," wrote one critic, Toilets for People founder Jason Kasshe, in a New York Times editorial, "it's that complicated, imported solutions do not work." Other low-tech inventions, like this life straw, aren't as complicated, but still rely on users to find a water source.

It was this dilemma—supplying drinking water in a way that's both practical and convenient—that served as the impetus for a new product called Warka Water, an inexpensive, easily-assembled structure that extracts gallons of fresh water from the air.

The invention from Arturo Vittori, an industrial designer, and his colleague Andreas Vogler doesn't involve complicated gadgetry or feats of engineering, but instead relies on basic elements like shape and material and the ways in which they work together. At first glance, the 30-foot-tall, vase-shaped towers, named after a fig tree native to Ethiopia, have the look and feel of a showy art installation. But every detail, from carefully-placed curves to unique materials, has a functional purpose.

The rigid outer housing of each tower is comprised of lightweight and elastic juncus stalks, woven in a pattern that offers stability in the face of strong wind gusts while still allowing air to flow through. A mesh net made of nylon or  polypropylene, which calls to mind a large Chinese lantern, hangs inside, collecting droplets of dew that form along the surface. As cold air condenses, the droplets roll down into a container at the bottom of the tower. The water in the container then passes through a tube that functions as a faucet, carrying the water to those waiting on the ground.
Using mesh to facilitate clean drinking water isn't an entirely new concept. A few years back, an MIT student designed a fog-harvesting device with the material. But Vittori's invention yields more water, at a lower cost, than some other concepts that came before it.

"[In Ethiopia], public infrastructures do not exist and building [something like] a well is not easy," Vittori says of the country. "To find water, you need to drill in the ground very deep, often as much as 1,600 feet.  So it's technically difficult and expensive. Moreover, pumps need electricity to run as well as access to spare parts in case the pump breaks down."

So how would Warka Water's low-tech design hold up in remote sub-Saharan villages? Internal field tests have shown that one Warka Water tower can supply more than 25 gallons of water throughout the course of a day, Vittori claims. He says because the most important factor in collecting condensation is the difference in temperature between nightfall and daybreak, the towers are proving successful even in the desert, where temperatures, in that time, can differ as much as 50 degrees Fahrenheit.

The structures, made from biodegradable materials, are easy to clean and can be erected without mechanical tools in less than a week. Plus, he says, "once locals have the necessary know-how, they will be able to teach other villages and communities to build the Warka."

In all, it costs about $500 to set up a tower—less than a quarter of the cost of something like the Gates toilet, which costs about $2,200 to install and more to maintain. If the tower is mass produced, the price would be even lower, Vittori says. His team hopes to install two Warka Towers in Ethiopia by next year and is currently searching for investors who may be interested in scaling the water harvesting technology across the region.

"It's not just illnesses that we're trying to address. Many Ethiopian children from rural villages spend several hours every day to fetch water, time they could invest for more productive activities and education," he says. "If we can give people something that lets them be more independent, they can free themselves from this cycle."

http://www.smithsonianmag.com/ist/?next=/innovation/this-tower-pulls-drinking-water-out-of-thin-air-180950399/#A2yubELeUqRiyUDG.99

Building Skin Developed That Could Cool Our Cities

© Harunori Noda

The urban heat island effect - the hot, overwhelming temperatures that a city’s concrete produces – has a huge impact on livability and comfort within the city. Now, an elegant cooling system has been designed that not only reduces energy usage, but – should it be installed on multiple buildings – could even lower the overall temperature of a city itself. Learn more, after the break.

Designed by Nikken Sekkei, The Sony City Osaki Building, which recently won the 2014 Tall Building Innovation Award from the Council on Tall Buildings and Urban Habitat (CTBUH), features an innovative new cooling system: a skin of water-filled ceramic pipes known as BioSkin. BioSkin reduces the surface temperature of a building up to 12°C, and can even lower the micro-climate surrounding the building 2°C. The CTBUH explains how:

“The simplicity of the system is elegant. The BioSkin tubes are made of extruded aluminum cores, with a highly water-retentive terra-cotta shell attached to the aluminum core using an elastic adhesive. When rainwater collects on the rooftop, it is then drained to a subsurface storage tank, where it is filtered and sterilized. This water is then pumped up and circulated through the pipes, which in the live test case were incorporated as balcony railings on a Tokyo office building, reminiscent of the horizontal screens seen throughout Japan and known as sudare. Rainwater penetrates outward through the porous ceramic, evaporating from the pipe’s surface, cooling the surrounding air. Excess water is then drained down to the soil of the premises to the extent possible, normalizing the water cycle and reducing the load on sewage infrastructure.”

 Cite: Galloway, Andrew. "Building Skin Developed That Could Cool Our Cities" 21 Jul 2014. ArchDaily. Accessed 11 Aug 2014. <http://www.archdaily.com/?p=529486>