A new study and article in Nature examine the vulnerability of urban areas to extreme events
Small and mid-size not mega cities are growing quickest and are highly vulnerable to extreme events and climate change – says a new study and paper in NATURE developed by an international team of researchers coordinated by Prof. Joern Birkmann (University of Stuttgart).
In the upcoming UN Conference on Cities (UN-Habitat III, 17-20 October 2016) rapidly growing small- and mid-sized cities in Africa and Asia that are highly susceptible to natural hazards need more attention, since these cities will decide about the success or failure of the New Urban Agenda.
At Habitat III around 170 countries will adopt the United Nations’ New Urban Agenda calling for governments to make cities more inclusive, sustainable and resilient. Small and medium-sized cities are particularly susceptible to natural hazards and climate change and often have limited capacities to build resilience.
Research and political attention in the past has often been given to the growth of mega-cities, but it will be the fast-growing small (populations of 0.3-0.5 million) and medium-sized (0.5 to 5 million) cities, especially in Africa and Asia where the success or failure of sustainable urban development will be decided.
Cities like Kampala in Uganda, Niamey in Niger and Chittagong in Bangladesh face a host of pressures that make them especially vulnerable to natural hazards. They are experiencing high relative rates of population growth while combating poverty, poor infrastructure and governance.
It is fitting that the UN Habitat III conference will be held from 17th to 20th October in Quito, Ecuador. In April, the city and nearby Portoviejo and Manta suffered an earthquake that killed more than 660 people and injured at least 10,000. Some 73,000 people were displaced to shelters, camps or host homes.
Over 700,000 people needed emergency assistance, such as safe drinking water, improved sanitation and hygiene kits. Three months on 11,000 people still lack basic services. Such devastation highlights how susceptible many cities are to natural hazards, from river and coastal flooding to drought, heat, storms, earthquakes, tsunamis and landslides.
Prof. Birkmann says: “In order to minimize human suffering, cities need to be able to anticipate, absorb, recover and learn quickly from adverse events. This requires clear priorities towards the most vulnerable and rapidly growing small- and medium-sized growing cities.“
The populations of medium and small cities around the world will rise by more than 32% (469 million people) between 2015 and 2030, compared with about 26% (203 million people) in large and megacities.
Despite these challenges and problems, strengthening the resilience of small and mid-sized cities offers opportunities. Smaller cities are easier to manage than megacities. Risk reduction and climate change strategies embedded now can expand as cities grow. And the coordination of and dialogues between different groups are more feasible in small cities.
To assess which countries have the highest urban vulnerability to natural hazards Prof. Joern Birkmann and Dr. Torsten Welle from the University of Stuttgart analysed the urban populations of 140 countries, including more than 1600 cities above 300,000 inhabitants. Based on a standard methodology (Welle et al. 2015), UN and World Bank data was used on urban populations, infrastructure and socio-economic indicators. In the absence of local data we used representative national data on insurance coverage, medical services and governance conditions.
The new study and comment in NATURE highlights the 15 countries where the most vulnerable urban population lives are: Afghanistan, Yemen, Haiti, Central African Republic, Niger, Nigeria, Cote d'Ivoire, Mauritania, Liberia, Pakistan, Mali, Iraq, Benin, Togo and Gambia.
Birkmann, Joern; Welle, Torsten, Solecki, William; Lawsa, Shuaib and Garschagen, Matthias (2016): Boost resilience of small and mid-sized cities, smaller settlements are growing faster than megacities — and they need more protection from extreme events, in: NATURE (vol. 537), pages 605-608
The Nature article and the supplement can be downloaded in online versions: http://nature.com/articles/doi:10.1038/537605a
Prof. Joern Birkmann, University of Stuttgart, Institute of Spatial and Regional Planning, Tel. ++ 49 (0)711 685-66333,
E-Mail joern.birkmann (at) ireus.uni-stuttgart.de
Andrea Mayer-Grenu | idw - Informationsdienst Wissenschaft
The Wadden Sea and the Elbe Studied with Zeppelin, Drones and Research Ships
19.09.2017 | Helmholtz-Zentrum Geesthacht - Zentrum für Material- und Küstenforschung
FotoQuest GO: Citizen science campaign targets land-use change in Austria
19.09.2017 | International Institute for Applied Systems Analysis (IIASA)
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...
Pathogenic bacteria are becoming resistant to common antibiotics to an ever increasing degree. One of the most difficult germs is Pseudomonas aeruginosa, a...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
20.09.2017 | Life Sciences
20.09.2017 | Power and Electrical Engineering
20.09.2017 | Physics and Astronomy