| 1. |
- Parker, Charles F.
(författare)
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Complex Negative Events and the Diffusion of Crisis : Lessons from the 2010 and 2011 Icelandic Volcanic Ash Cloud Events
- 2015
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Ingår i: Geografiska Annaler. Series A, Physical Geography. - : Swedish Society for Anthropology and Geography. - 0435-3676 .- 1468-0459. ; 97:1, s. 97-108
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Tidskriftsartikel (refereegranskat)abstract
- In a world characterized by complex interdependence, crises that originate in one country have the potential to rapidly diffuse across borders and have profound regional and even global impacts. The eruption of the Icelandic volcano Eyjafjallajökull in April 2010 demonstrates how rapidly a natural disaster can morph from a local crisis with local effects to a cascading crisis with international effects across multiple sectors. After spreading to Europe the ash cloud severely disrupted air travel and paralyzed the European aviation transport system. This cascading crisis caught authorities by surprise and revealed the need to improve crisis preparedness to deal with the threat of volcanic ash in particular and aviation in general at the international, EU, and national levels. In the aftermath of the event, reforms and policy changes ensued. Just over a year later, the Icelandic volcano Grímsvötn erupted, providing an opportunity to observe the revised system respond to a similar event. The origins, response, reforms, lessons learned, and questions of resilience connected to these complex negative events are the subject of this paper. The article concludes by addressing the question of whether and to what extent the vulnerabilities and problems exposed by the 2010 volcanic ash cloud event are amenable to reform.
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| 2. |
- Khanchoul, Kamel, et al.
(författare)
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Sediment rating curves developed on stage and seasonal means in discharge classes for the Mellah wadi, Algeria
- 2008
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Ingår i: Geografiska Annaler. Series A, Physical Geography. - : Informa UK Limited. - 0435-3676 .- 1468-0459. ; 90A:3, s. 227-236
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Tidskriftsartikel (refereegranskat)abstract
- The focus of the present study was to estimate suspended sediment load from the Mellah catchment (550 km(2)) during storms. Suspended sediment rating curves were developed on data from a 23-year period. The regression technique of this paper involves a division of data into discharge-based classes, the mean concentrations and discharges of which are used to develop power regressions through log-transformation. Sediment rating curves were also developed on means of data grouped into seasons and stages. Sediment loads estimated by rating curves uncorrected for bias involved underestimations of down to 9% compared with loads from measured concentrations. Correction for bias reduced underestimations to a range from 0.79 to 3%. Rating curves divided into rising and falling stages had the lowest underestimation and were used to estimate load during periods without concentration measurements. During the 23-year study period, the mean annual suspended sediment yield was 373 T/km(2). Sediment transport is dominated by winter storms accounting for 61% of the annual load. A high exponent 'b' of the power regression equations during the winter season confirms the intense geomorphic work by winter season storms caused by high intensity rainfall, low vegetation cover, and heavy machine activity in the fields.
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| 3. |
- Strömquist, Lennart, 1943-, et al.
(författare)
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Integrated landscape analyses of change of miombo woodland in Tanzania and its implication for environment and human livelihood
- 2009
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Ingår i: Geografiska Annaler. Series A, Physical Geography. - : Informa UK Limited. - 0435-3676 .- 1468-0459. ; 91A:1, s. 31-45
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Tidskriftsartikel (refereegranskat)abstract
- Landscapes bear witness to past and present natural and societal processes influencing the environment and human livelihoods. By analysing landscape change at different spatial scales over time the effects on the environment and human livelihoods of various external and internal driving forces of change can be studied. This paper presents such an analysis of miombo woodland surrounding the Mkata plains in central Tanzania. The rich natural landscape diversity of the study area in combination with its historical and political development makes it an ideal observation ground for this kind of study. The paper focuses on long-term physical and biological changes, mainly based on satellite information but also on field studies and a review of documents and literature.The miombo woodlands are highly dynamic semi-arid ecosystems found on a number of nutrient-poor soil groups. Most of the woodlands are related to an old, low-relief geomorphology of erosion surfaces with relatively deep and leached soils, or to a lesser extent also on escarpments and steep Inselberg slopes with poor soils. Each period in the past has cast its footprints on the landscape development and its potential for a sustainable future use. On a regional level there has been a continual decrease in forest area over time. Expansion of agriculture around planned villages, implemented during the 1970s, in some cases equals the loss of forest area (Mikumi-Ulaya), whilst in other areas (Kitulangalo), the pre-independence loss of woodland was small; the agricultural area was almost the same during the period 1975–1999, despite the fact that forests have been lost at an almost constant rate over the same period. Illegal logging and charcoal production are likely causes because of the proximity to the main highway running through the area. Contrasting to the general regional pattern are the conditions in a traditional village (Ihombwe), with low immigration of people and a maintained knowledge of the resource potential of the forest with regards to edible plants and animals. In this area the local community has control of the forest resources in a Forest Reserve, within which the woody vegetation has increased in spite of an expansion of agriculture on other types of village land. The mapping procedure has shown that factors such as access to transport and lack of local control have caused greater deforestation of certain areas than during the colonial period. Planned villages have furthermore continued to expand over forest areas well after their implementation, rapidly increasing the landscape fragmentation. One possible way to maintain landscape and biodiversity values is by the sustainable use of traditional resources, based on local knowledge of their management as illustrated by the little change observed in the traditionally used area.
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| 4. |
- Boin, Arjen, et al.
(författare)
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Explaining Success and Failure in Crisis Coordination
- 2015
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Ingår i: Geografiska Annaler. Series A, Physical Geography. - : Informa UK Limited. - 0435-3676 .- 1468-0459. ; 97:1, s. 123-135
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Tidskriftsartikel (refereegranskat)abstract
- In virtually every assessment of responses to large-scale crises and disasters, coordination is identified as a critical failure factor. After the crisis, official committees and political opponents often characterize the early phases of the response as a ‘failure to coordinate.’ Not surprisingly, improved coordination quickly emerges as the prescribed solution. Coordination, then, is apparently both the problem and the solution. But the proposed solutions rarely solve the problem: coordination continues to mar most crises and disasters. In the absence of a shared body of knowledge on coordination, it is hard to formulate a normative framework that allows for systematic assessment of coordination in times of crisis. As coordination is widely perceived as an important function of crisis and disaster management, this absence undermines a fair and balanced assessment of crisis management performance. This paper seeks to address that void. We aim to develop a framework that explains both the failure and success of crisis coordination. We do this by exploring the relevant literature, reformulating what coordination is and distilling from research the factors that cause failure and success.
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| 5. |
- Nohrstedt, Daniel, 1974-, et al.
(författare)
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Do Floods Drive Crisis Mitigation Policy? : Evidence from Swedish Municipalities
- 2015
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Ingår i: Geografiska Annaler. Series A, Physical Geography. - Chichester, West Sussex : Wiley-Blackwell. - 0435-3676 .- 1468-0459. ; 97:1, s. 109-122
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Tidskriftsartikel (refereegranskat)abstract
- It is well established that continuous development of local-level mitigation policy plans and actions increases the chances of effective responses to natural hazards. What is less well known is how and why policy development, including the scope and pace of changes in municipality crisis mitigation programs, varies across local-level crisis mitigation systems. Using survey data on municipality hazard mitigation policy in Sweden, this study documents patterns of policy development and explores candidate explanations. Special attention is devoted to floods, which present local managers with opportunities to learn and adjust local mitigation policies. To investigate floods along with other hazards as potential drivers for local mitigation policy, the study examines three approaches to policy development: external shocks, transformation without disruption, and regional diffusion. Overall, in this case, the transformation without disruption model and the regional diffusion model do better than the external shocks model. Important precursors of policy development include collaboration, learning and diffusion effects from events and policy adoption in nearby municipalities. The study demonstrates the value of a broader analytical approach to policy development, which takes into account the interplay between events, collaborative management, and learning.
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| 6. |
- Clark, Eric
(författare)
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Book review
- 2005
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Ingår i: Geografiska Annaler. Series A. Physical Geography. - 0435-3676. ; 87:4, s. 300-302
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Recension (övrigt vetenskapligt/konstnärligt)
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