Transforming urban wasteland into opportunity

Mar 13, 2013 by Jan Overney
Transforming urban wasteland into opportunity
Aerial view of the Ecopark neighborhood in Neuchâtel. Credit: 2013 Yves André

How can disused urban sites be regenerated sustainably? A new book addresses this important issue.

Almost every city has them - closed down factories and utilities, run down and abandoned commercial and residential plots. Today, derelict urban sites are increasingly being considered as a resource by and architects in cities strapped for space but seeking to grow. In Europe, their has become popular, often revitalizing city centers while increasing their density. In a book that was published recently, Emmanuel Rey puts forward a framework based both on research projects and concrete experience gained in the context of the rehabilitation of what is now the Ecoparc neighborhood in Neuchâtel to help integrate sustainability into the core of this regeneration process.

With the number of city dwellers on the rise, cities are under pressure to accommodate more and more residents - ideally without spilling over the already built perimeter. Loosely connected built areas squander space and spoil the landscape, and studies show that they lead to higher per capita, increased reliance on cars, and much higher than dense settlements. So what can be done to limit the spreading of urban development onto previously uninhabited land?

"In the heart of built areas, we often run into urban fallows, wastelands, plots of lands whose functions have fallen out of demand," says Rey, who is a professor in the Laboratory of Architecture and Sustainable Technologies (LAST). Sites left abandoned following the shutting down of , railway lines, military sites, hospitals, or other infrastructures. "By reclaiming and regenerating them we can give them a second life as contemporary residential, commercial, institutional and public areas. The facts that they tend to be located within urban areas, that they are already tied into the transportation and public utilities networks, and that they are lying idle make them ideal candidates for this type of transformation."

Project for the rehabilitation of an industrial fallow in Olten, Switzerland. Credit: Bauart

In Switzerland, a quite densely populated country in the heart of Europe, urban wastelands cover a surface larger than the city of Geneva and have the potential to absorb the population growth expected for the coming decade. But transforming them sustainably is challenging. According to Emmanuel Rey it isn't enough to increase their density, recycle an optimal fraction of wastewater and locally produce solar energy. "It is essential that we optimize the economic and environmental performance of cities. But to achieve true sustainability, this must be done keeping in mind the social and emotional dimensions as well," he says.

The bulk of Emmanuel Rey's new book presents a methodology based on a catalog of indicators, with which urban land regeneration projects can be evaluated from the day of their conception to their final conclusion. "The methodology presented gives practitioners involved in urban land regeneration projects a more robust foundation on which to base their decisions, in particular regarding their sustainability," says Rey. By federating the highly fragmented practical and theoretical know-how that has accumulated in urban regeneration, this book aims to provide a structured reference work in this developing field with a bright future.

Explore further: Uncertainty about sea levels to last 10 more years, experts say

More information: Book Summary (Presses Universitaires de Louvain) Laboratory of Architecture and Sustainable Technologies (LAST) last.epfl.ch/

add to favorites email to friend print save as pdf

Related Stories

Tackling urban sustainability on global scale

Dec 05, 2012

As the world's urban areas continue to grow, evidenced by rampant poverty and squalor from Shanghai to Rio de Janeiro, the question becomes: How can we focus on protecting environmental resources for future ...

Report warns of urbanization swell by 2050

Apr 10, 2012

We hear and read a lot about our human carbon footprint but what do we know about our urban footprint? According to a new United Nations (UN) report, this urban footprint will expand by another 1.2 million ...

Growth of cities endangers global environment

Aug 19, 2011

The explosive growth of cities worldwide over the next two decades poses significant risks to people and the global environment, according to a meta-analysis published today in Plos One.

Plants help lower temperatures

Feb 19, 2013

(Phys.org)—As Melbourne swelters through another heat wave, scientists are using thermal imaging to work out how plants can be used to reduce the severe temperatures in our cities.

Recommended for you

European climate at the +2 C global warming threshold

21 minutes ago

A global warming of 2 C relative to pre-industrial climate has been considered as a threshold which society should endeavor to remain below, in order to limit the dangerous effects of anthropogenic climate change.

Australia's dirty secret: who's breathing toxic air?

2 hours ago

Australians living in poorer communities, with lower employment and education levels, as well as communities with a high proportion of Indigenous people, are significantly more likely to be exposed to high ...

Predicting bioavailable cadmium levels in soils

19 hours ago

New Zealand's pastoral landscapes are some of the loveliest in the world, but they also contain a hidden threat. Many of the country's pasture soils have become enriched in cadmium. Grasses take up this toxic heavy metal, ...

User comments : 0

More news stories

European climate at the +2 C global warming threshold

A global warming of 2 C relative to pre-industrial climate has been considered as a threshold which society should endeavor to remain below, in order to limit the dangerous effects of anthropogenic climate change.

Melting during cooling period

(Phys.org) —A University of Maine research team says stratification of the North Atlantic Ocean contributed to summer warming and glacial melting in Scotland during the period recognized for abrupt cooling ...

Floating nuclear plants could ride out tsunamis

When an earthquake and tsunami struck the Fukushima Daiichi nuclear plant complex in 2011, neither the quake nor the inundation caused the ensuing contamination. Rather, it was the aftereffects—specifically, ...