Worldwide 55 percent of all people is living in cities. They cover 4 percent of the landsurface, use 67 percent of all energy that is produced and are responsible for 70 percent of the emission of greenhouse gasses. Cities are not only the most important economic centres of the world, their political power is also increasing. Observers believe that growing sustainability will result in the first place from policies issued by the world’s largest cities instead of by national governments.
In order to express their intentions, many cities showcase themselves with adjectives such as ‘smart’, resilient’, sustainable’, ‘sharing’ and the like. These predicates refer to results that already have been accomplished, however small, but they express their mission for the future in the first place.
An inventory of current literature (1) resulted in more then 30 definitions of smart city. Most cited (348 times) is the definition of Caragliu (2009): ‘We believe a city to be smart when investments in human and social capital and and traditional (transport) and modern (ICT) communication infrastructure fuel sustainable economic growth and a high quality of life, with a wise management of natural resources, through participatory governance.’
The first appearance of the concept resilience in connection with urban policy dates back to 2002. However, only in 2012 the frequency of searches in Google for resilient city started to boom.
In contrast with smart city, the number of definitions of resilient city is limited. Cities who call themselves resilient, like Rotterdam and The Hague in The Netherlands, claim to build capacity within individuals, communities, institutions, businesses, and systems to survive, adapt, and grow no matter what kinds of chronic stresses and acute shocks they experience.
Chronic stresses weaken the fabric of a city on a daily or cyclical basis. Examples include: high unemployment, overcrowded or inefficient public transportation systems, endemic violence and chronic food and water shortages. Acute shocks are sudden, sharp events that threaten a city. Examples include earthquakes, floods, disease outbreaks and terrorist attacks.
The concepts smart and resilient city have different roots. Large technology companies, like Cisco, IBM, Siemens, Philips started promoting to become a smart city expert ten years ago during the economic crisis as part of their strategy to find new markers and to attract new customers.
The use of the concept resilient city is promoted by international organizations and associations of cities in order to improve city’s capabilities to deal with hazards like the hurricanes Katarina in the New Orleans region (2005) and Sandy along the eastcoast of North America (2012).
As evidenced in the definition mentioned above, the concept hazard has been broadened to include external pressures in general, varying from climate change and environmental degradation to poverty and traffic congestion.
The concept smart city has also evolved. In another article I made a distinction between smart city 1.0, 2.0 and 3.0. These descriptions mark the evolution from the mere accentuation of the deployment of ICT as a key tool to fuel economic growth and competitiveness, to a multi-objective and participatory strategy capable to tackle problems of environmental deterioration, social equity and inclusion and building social capital.
The Resilient City Movement has been boosted in 2014 when the Rockefeller Foundation invested $100 million in the 100 Resilient Cities Challenge. Partly because its institutionalization, the policies of the cities partnering in the 100 Resilient City Challenge have more in common than those of the self appointed smart cities. The so-called City Resilience Framework, plays a key role in each of the participating city’s strategy.
The city Resilience framework
Based upon this framework, an index has been developed. Cities can calculate an indicator of their resilience with respect to the topics mentioned above and subsequently develop a strategy to improve weak points. The result of the analysis made in Rotterdam is indicated below. At this time 30 cities have published strategy reports to increase their resilience in the next decade. Among them are Rotterdam and Athens, a city that came with a brilliantly elaborated action report. A brand new report, Cities taking Action, written on occasion of the World Summit in July 2017, offers an anthology of what has been reached during the recent past within a selection of the 100 participating cities.
An analysis of definitions of smart and resilient cities and of characteristics attributed to each of these concepts is revealing a very broad overlap as is demonstrated in the box below.
As a consequence, some publications consider resilience as a characteristic of smart cities. Others believe that resilience will replace smart. I am not in favor of the assimilation of one of these terms by the other. Both concept have there own roots and are on their way to become meaningful for citizens. Therefore, they better can be treated as comparable, as is understood well by one of the platforms. Otherwise, the City Resilience Framework is an extremely useful policy making tool for smart cities because of its high level of elaboration.
Taking into account the convergence of definitions, both smart and resilient cities are building capabilities to deal with and prevent chronic stress and acute shocks, deploying a broad range of technologies. They enable individuals, communities, institutions and businesses to participate in the definition and execution of policies. They invest in the growth of human and social capital by education, meaningful work, communing, and sharing, and including all of its citizens to live in a decent way.
This is the 5th episode in a series of 6 articles about smart cities and the like. This article has already been publicised in the Smart City Hub
 Resilient cities: A systematic approach for developing cross-sectoral strategies in the face of climate change: Rocco Papa. Adrina Galderisi, Maria Christina Vigo Majello, Erica Saretta. in: TeMA Journal of Land Use Mobility and Environment 1 (2015)