multiple hazards
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2021 ◽  
Author(s):  
Franciele Maria Vanelli ◽  
Masato Kobiyama ◽  
Mariana Madruga de Brito

Abstract. Given the recent developments in socio-hydrology and its potential contributions to disaster risk reduction (DRR), we conducted a systematic literature review of socio-hydrological studies aiming to identify persisting gaps and discuss tractable approaches for tackling them. A total of 44 articles that address natural hazards or disasters were reviewed in detail. Our results indicated that: (i) 77.3 % of the studies addressed floods whereas there were very few research applications for droughts (11.4 %) and compound or multi-hazards (11.4 %); (ii) none of the articles investigated interactions across temporal and spatial scales; (iii) quantitative approaches were used more often (65.9 %) in comparison to mixed (22.7 %) and qualitative (11.4 %) approaches; (iv) monodisciplinary studies prevailed (61.4 %) over multi or interdisciplinary (9.1 %) ones, and (v) only 34.1 % of the articles involved stakeholder participation. In summary, we found that there is a fragmentation in the field, with a multitude of social and physical components, methods and data sources being used. Based on these findings, we point out potential ways of tackling the identified challenges to advance socio-hydrology, including studying multiple hazards in a joint framework and exploiting new methods for integrating results from qualitative and quantitative analyses to leverage on the strengths of different fields of knowledge. Addressing these challenges will improve our understanding of human-water interactions to support DRR.


2021 ◽  
Vol 13 (24) ◽  
pp. 13993
Author(s):  
Xuexi Chen ◽  
Guohua Chen ◽  
Qin Yang ◽  
Jialing Li ◽  
Zhi Yuan ◽  
...  

With the frequent occurrence of various disasters and accidents, realizing the periodic assessment and visualization of urban safety and security considering multiple hazards is of great significance for safe urban development. In this paper, a periodic assessment system is developed for urban safety and security considering multiple hazards, based on WebGIS. This system consists of an assessment module, a visualization module, and an assistant module that integrates the assessment model to process the assessment data quickly and realizes the visualization of a thematic map and data statistics for rationalizing assessment results. The assessment of a typical urban area was carried out to prove that the created system can effectively conduct periodic assessments and support single-hazard and multi-hazard analysis and auxiliary decision-making. This system can be applied to the grid management and periodic assessment of urban areas at different levels, with high expansibility and application value. It can also help to promote the sustainable construction of a safe and smart city.


2021 ◽  
Vol 21 (11) ◽  
pp. 3439-3447
Author(s):  
Giuliano Di Baldassarre ◽  
Elena Mondino ◽  
Maria Rusca ◽  
Emanuele Del Giudice ◽  
Johanna Mård ◽  
...  

Abstract. The severe impact of global crises, such as COVID-19 and climate change, is plausibly reshaping the way in which people perceive risks. In this paper, we examine and compare how global crises and local disasters influence public perceptions of multiple hazards in Italy and Sweden. To this end, we integrate information about the occurrence of hazardous events with the results of two nationwide surveys. These included more than 4000 participants and were conducted in two different phases of the COVID-19 pandemic corresponding to low (August 2020) and high (November 2020) levels of infection rates. We found that, in both countries, people are more worried about risks related to experienced events. This is in line with the cognitive process known as the availability heuristic: individuals assess the risk associated with a given hazard based on how easily it comes to their mind. Epidemics, for example, are perceived as less likely and more impactful in Italy compared to Sweden. This outcome can be explained by cross-country differences in the impact of, as well as governmental responses to, COVID-19. Notwithstanding the ongoing pandemic, people in both Italy and Sweden are highly concerned about climate change, and they rank it as the most likely threat.


2021 ◽  
Author(s):  
◽  
Shabana Khan

<p>This thesis defines and explores the hazardscape of the Wellington Region and investigates its influences on variations in the hazard response from local people and administration throughout the region. The research first identifies and argues for a holistic conceptual framework such as 'hazardscape' to study multiple hazards and associated issues at a place. Although the need for a holistic approach has been recognised in the literature, conventional research has generally been compartmentalized into the individual study of hazards, issues and response. Despite the fact that geography has a tradition of using an ecological approach to study natural hazards, the holistic approach has been compromised for various reasons. Behavioural, perception, vulnerability and resilience models, although covering significant aspects of hazards, present only a partial reality. A skewed focus on humans, although a popular emphasis, also detracts from the ability of hazard geography to attain a truly holistic view. Even though it has been recognized that natural hazards result through interaction of human and natural systems, the separation of the two fails to explain many complexities that result through ecosystem functioning. Studies of hazards and disasters are predominantly focused on single hazard assessment of an area, and there is a gap in the literature that deals with multiple hazards and associated issues. With the background of these shortcomings, this thesis explores the concept of 'hazardscape' for a more holistic framework to study various aspects of hazards at a place. The thesis broadly contains three parts. In the first part, it gives the conceptual framework to study the hazardscape. It defines 'hazardscape' as a dynamic scape, which reflects the physical susceptibility of a place and vulnerability of human life and assets to various hazards in a given human ecological system. The research uses the term 'hazardscape' for its geographical connotation, its ability to express the ecological perspective behind hazard creation and its merits over the other related term 'riskscape'. The study also argues the significance of hazardscape in the shifting paradigm of both subject matter and method of evaluation i.e. from descriptive account of individual factors to a holistic analysis. The second part of the thesis examines the hazardscape of the Wellington Region, by assessing its physical susceptibility, human vulnerability and spatio-temporal occurrence of hazards in the region. This investigation is primarily based on the secondary data, and attempts to provide an overall picture of the local hazardscape. It highlights a few distinctive characteristics of the hazardscape of the Wellington Region including its excessive physical susceptibility to a wide range of hazards along with varied human vulnerability and the history of extreme events in the region. The nature and amount of impact from past events differ over space, and is heavily skewed towards the urban areas in the western section of the region. The third section of the thesis assesses the influences of hazardscape on hazard response of local people and administration. The hypothesis used to guide the study is "whereas integrated regional planning is likely to produce a uniform response to hazard, hazardscape introduces variations in the local response throughout the region". It was formulated because the establishment of a Regional Policy Statement and a Regional Civil Defence and Emergency Management Plan could be expected to lead to uniform responses throughout the region. However, the expectation was that aspects of the hazardscape would continue to influence response, despite the existence of the over-arching plan. The analysis is based on both primary and secondary data, and involves both quantitative and qualitative data and methods to present the findings. The primary data is based on the interview schedules and structured questionnaires conducted with local people and administration throughout the region. The sample was selected through a stratified purposive sampling method based on the location of respondents with respect to their hazard exposure. This method, while providing an unsuitable platform for rigorous statistical testing, has been designed to capture the extreme range of conditions and responses. It is also able to reveal trends and indicative relationships that can be matched with expectations and theory. The research finds that various characteristics of the hazardscape including hazards, physical susceptibility and vulnerability have influenced and produced variations in the hazard response over space. It argues that a detailed analysis of a hazardscape can contribute to effective hazard management along with human response to hazards. The thesis therefore has both theoretical significance and a practical validity.</p>


2021 ◽  
Author(s):  
◽  
Shabana Khan

<p>This thesis defines and explores the hazardscape of the Wellington Region and investigates its influences on variations in the hazard response from local people and administration throughout the region. The research first identifies and argues for a holistic conceptual framework such as 'hazardscape' to study multiple hazards and associated issues at a place. Although the need for a holistic approach has been recognised in the literature, conventional research has generally been compartmentalized into the individual study of hazards, issues and response. Despite the fact that geography has a tradition of using an ecological approach to study natural hazards, the holistic approach has been compromised for various reasons. Behavioural, perception, vulnerability and resilience models, although covering significant aspects of hazards, present only a partial reality. A skewed focus on humans, although a popular emphasis, also detracts from the ability of hazard geography to attain a truly holistic view. Even though it has been recognized that natural hazards result through interaction of human and natural systems, the separation of the two fails to explain many complexities that result through ecosystem functioning. Studies of hazards and disasters are predominantly focused on single hazard assessment of an area, and there is a gap in the literature that deals with multiple hazards and associated issues. With the background of these shortcomings, this thesis explores the concept of 'hazardscape' for a more holistic framework to study various aspects of hazards at a place. The thesis broadly contains three parts. In the first part, it gives the conceptual framework to study the hazardscape. It defines 'hazardscape' as a dynamic scape, which reflects the physical susceptibility of a place and vulnerability of human life and assets to various hazards in a given human ecological system. The research uses the term 'hazardscape' for its geographical connotation, its ability to express the ecological perspective behind hazard creation and its merits over the other related term 'riskscape'. The study also argues the significance of hazardscape in the shifting paradigm of both subject matter and method of evaluation i.e. from descriptive account of individual factors to a holistic analysis. The second part of the thesis examines the hazardscape of the Wellington Region, by assessing its physical susceptibility, human vulnerability and spatio-temporal occurrence of hazards in the region. This investigation is primarily based on the secondary data, and attempts to provide an overall picture of the local hazardscape. It highlights a few distinctive characteristics of the hazardscape of the Wellington Region including its excessive physical susceptibility to a wide range of hazards along with varied human vulnerability and the history of extreme events in the region. The nature and amount of impact from past events differ over space, and is heavily skewed towards the urban areas in the western section of the region. The third section of the thesis assesses the influences of hazardscape on hazard response of local people and administration. The hypothesis used to guide the study is "whereas integrated regional planning is likely to produce a uniform response to hazard, hazardscape introduces variations in the local response throughout the region". It was formulated because the establishment of a Regional Policy Statement and a Regional Civil Defence and Emergency Management Plan could be expected to lead to uniform responses throughout the region. However, the expectation was that aspects of the hazardscape would continue to influence response, despite the existence of the over-arching plan. The analysis is based on both primary and secondary data, and involves both quantitative and qualitative data and methods to present the findings. The primary data is based on the interview schedules and structured questionnaires conducted with local people and administration throughout the region. The sample was selected through a stratified purposive sampling method based on the location of respondents with respect to their hazard exposure. This method, while providing an unsuitable platform for rigorous statistical testing, has been designed to capture the extreme range of conditions and responses. It is also able to reveal trends and indicative relationships that can be matched with expectations and theory. The research finds that various characteristics of the hazardscape including hazards, physical susceptibility and vulnerability have influenced and produced variations in the hazard response over space. It argues that a detailed analysis of a hazardscape can contribute to effective hazard management along with human response to hazards. The thesis therefore has both theoretical significance and a practical validity.</p>


2021 ◽  
Vol 12 ◽  
Author(s):  
Lace Padilla ◽  
Sarah Dryhurst ◽  
Helia Hosseinpour ◽  
Andrew Kruczkiewicz

Making decisions with uncertainty is challenging for the general public, policymakers, and even highly trained scientists. Nevertheless, when faced with the need to respond to a potential hazard, people must make high-risk decisions with uncertainty. In some cases, people have to consider multiple hazards with various types of uncertainties. Multiple hazards can be interconnected by location, time, and/or environmental systems, and the hazards may interact, producing complex relationships among their associated uncertainties. The interaction between multiple hazards and their uncertainties can have nonlinear effects, where the resultant risk and uncertainty are greater than the sum of the risk and uncertainty associated with individual hazards. Effectively communicating the uncertainties related to such complicated systems should be a high priority because the frequency and variability of multiple hazard events due to climate change continue to increase. However, the communication of multiple hazard uncertainties and their interactions remains largely unexplored. The lack of practical guidance on conveying multiple hazard uncertainties is likely due in part to the field’s vast expanse, making it challenging to identify entry points. Here, we offer a perspective on three critical challenges related to uncertainty communication across various multiple hazard contexts to galvanize the research community. We advocate for systematic considerations of multiple hazard uncertainty communication that focus on trade-offs between complexity and factors, including mental effort, trust, and usability.


Author(s):  
Monika Kuffer ◽  
Dana R. Thomson ◽  
Andrew Maki ◽  
Sabine Vanhuysse ◽  
Stefanos Georganos ◽  
...  

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