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Cities Alive: Arup report examines latest trends in urban green spaces

Smart Buildings

Cities Alive: Arup report examines latest trends in urban green spaces

From vertical farming to glowing trees (yes, glowing trees), Arup engineers imagine the future of green infrastructure in cities across the world.

By BD+C Staff | April 28, 2014
Illustration: Arup
Illustration: Arup

A new report by engineering giant Arup analyzes current research and trends about green space in cities and how it can benefit urban communities socially, economically, and environmentally. 

Cities Alive draws evidence from cities all over the world of how public spaces of all types can affect the security, happiness, and social life of residents.

The report is divided into three categories‚ÄĒsocial benefits, environmental benefits, and economic benefits‚ÄĒand details more than two dozen green infrastructure tactics, including underground roads, automated transport, permeable pavements, water roofs, vertical farming, and even glowing trees (see illustration below for a complete list).

Here are some of the findings we thought were interesting, divided by their sections in the report.



Social Benefits: Rethinking Urban Communities

Safer driving¬†‚ÄĒ¬†City trees can enhance traffic calming, the report says. Tall trees make streets seem narrower, which makes driver slow down. Meanwhile, close spacing of trees creates the illusion of speed, causing the same slowing effect.

Psychological benefits¬†‚ÄĒ Research cited in the report suggests that people are calmer and happier when they can experience nature on a daily basis. "Even passive interaction with nature‚ÄĒsimply being able to see a tree through a window‚ÄĒis enough to lower stress and blood pressure," Cities Alive says.

Lower crime ‚ÄĒ¬†Research cited in the report reflects a trend of lower crime rates in communities where vacant lots are turned into green spaces, as opposed to communities where these lots remain vacant and undeveloped.


The report details 25 tactics cities can employ to improve their green infrastructure. Illustration: Arup's Cities Alive report. CLICK IMAGE TO ENLARGE


Better community social life¬†‚ÄĒ¬†The more effective the design of the community, the more residents can build a tradition of social interaction in its spaces.

Space with an identity¬†‚ÄĒ¬†Removing public spaces seems to be a factor in recent political unrest, and these spaces can foster protest communities and encourage democratic involvement: "...the wave of unrest that gripped Turkey in early 2013 began as a result of government policy decisions to remove and develop on top of public parks, particularly centred on Gezi Park in Istanbul. Here the green space became a place for a unique and empowered community to evolve and a place for them to call their own, much like the parallel Tahrir Square in Egypt or Zucotti Park in New York acting as the¬†centre of the global Occupy movement."

Green space can encourage feelings of security¬†‚ÄĒ¬†Research from the University of Illinois showed that people who have daily contact with nature, specifically trees, had stronger relationships with their communities and experienced 52% less crime than those without that daily dose of green.

Thoughtful planning can revitalize urban shopping spaces¬†‚ÄĒ¬†"Studies have shown that well-planned rebranding of urban shopping spaces can increase commercial trading by up to 40%."

Green space can increase productivity¬†‚ÄĒ¬†When an office has a view of green space, the report says, people in those offices may take as much as a quarter less time off as opposed to people without a view of green space.



Environmental Benefits: Smart and Resilient Environments

Coping with increased rainfall¬†‚ÄĒ¬†With climate change causing more rainfall in many places, municipalities need to come up with more effective stormwater drainage systems. There are examples of this occurring already, in Portland, Ore., and other places.

Better urban planning in the face of climate change¬†‚ÄĒ¬†Flooding is now a bigger issue in urban areas than ever. As a result, "new urban planning models suggest that where appropriate, space should be allocated for water-sensitive urban design (WSUD), and features such as new water bodies, reed beds, and areas of ground percolation can also be designed for buffering, water filtration, and drainage. These types of integrated GI solutions can create attractive new natural features in the city environment while also offering climate change adaptation."

Urban planners may need to begin maximizing data sharing in public spaces¬†‚ÄĒ¬†Data may begin to add another layer of entertainment¬†in public spaces‚ÄĒpeople may gather to watch movies or play video games together, just as they gather now for concerts or parades.

Virtual environments may become a reality¬†‚ÄĒ¬†Where space is simply too limited to create green areas, projects like¬†Yanko Design‚Äôs D‚ÄôNature modular digital greenspace may act as a supplement to existing greenery.¬†

Geographical Information Science (GIS) can allow for smarter urban planning¬†‚ÄĒ¬†From the report: "GIS uses overlays of different factors of a landscape to calculate optimized layouts for a variety of land uses, from agriculture to ecological potential, calculating best travel routes and the potential for alternative future applications for the space."

Biodiversity is necessary to the health of the planet¬†‚ÄĒ¬†Not only is biodiversity necessary to ecological health, the report says, but it "is a great indicator of the ideology of a development. It can be a gateway to other green techniques and technologies that can help to sustain the urban ecosystem as a whole."

Designers should use the different layers of the city to allow as much green space as possible¬†‚ÄĒ¬†By exploiting space such as that on roofs, balconies, and walls, designers can work within dense urban environments without destroying what little nature still remains. The High Line in New York City is cited as an example of this.



Economic Benefits: Urban Resource Streams

Vertical farming may be able to address global food shortages¬†‚ÄĒ¬†Vertical farming is the idea of containing food production, harvesting of green energy, and a closed feed system with limited distribution and transportation requirements. This creates a minimal carbon footprint and means that the 'farm' can merge with the existing urban structure.

The Biophylia Hypothesis and Urban Food Supplies¬†‚ÄĒ¬†From the report: "Proponents of the Biophilic City maintain that better education about the possibilities of urban foraging and guidelines promoting wild vegetation for human wellbeing may lead to a revolution in the way people interact with the city, introducing a new, wild urban consumer ecosystem into which urbanites are fully integrated."

Making urban spaces healthier, quieter, and more beautiful¬†‚ÄĒ¬†Tearing down highways and buildings to reclaim waterfronts and parklands is possible and an important way to improve the quality of life in cities.

Movement toward locally sourced, traditional materials¬†‚ÄĒ¬†Both the desires of reducing carbon footprints and creating more authentic spaces has led many architects and designers to seek out locally-sourced construction materials.¬†

Integrating living ecosystems into the city¬†‚ÄĒ¬†Incorporating more trees into urban landscapes can assist with heat, pollution, and air quality, as well as reducing energy bills by decreasing the need for air conditioning.

New green construction materials can help make cities more sustainable¬†‚ÄĒ¬†For example, 'green concrete' that absorbs carbon from the surrounding environment and stores thermal energy is being researched. ¬† ¬†

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