Search results

The 2011 and 2013 Queensland, Australia flood events caused massive infrastructure damage for low-level stream crossings such as floodways and culverts in regional Queensland. Failures of newly built floodways during the 2013 Queensland flood event in the Lockyer Valley Regional Council area raised significant concerns with respect to floodway design practices adopted in Australia and attracted significant research interest to enhance the resilience of floodways. Review of existing floodway design guidelines indicates that floodway design process is closely related to hydraulic and hydrological aspects. However, conducting a hydrological analysis is a challenging in rural areas, mainly owing to information scarcity. Floodways in rural areas often require a simple and economical solution contrast to more detailed hydrological analysis approaches adopted in urbanised areas. This paper aims to identify and apply the rational method to estimate maximum flood discharges at selected floodway locations in the Lockyer Valley Regional Council area. The paper further attempts to provide the first insight of flood characteristics during the 2011 and 2013 Queensland flood events at three catchment outputs across the selected case study area. It also highlights modern day challenges for practising engineers and researchers when estimating flood characteristics in rural areas. The paper shows that cross-cultivation of advancement in engineering practices and traditional approaches can promote quantitative approaches when assessing floodway damage in regional areas.

The research identifies limitations when assessing flood impact in rural regions in collaboration with experience from industry partners and authors themselves. The authors developed a framework to overcome those limitations arising from information scarcity to minimise the trial and error design approaches utilised in the current design practices for floodways.

This paper developed a simple and effective hydrological method with minimum inputs. It also provides an example on collating available but scattered resources and traditional method to quantitatively assess flood discharges of a rural catchment in Australia. Flood discharges at three catchment outlets along the Left-Hand Branch Road in the Lockyer Valley Region during both 2011 and 2013 Queensland flood events are estimated for the first time. The findings highlight the impact of flood discharges and flooded period on floodway failures.

The current research is based on a selected case study area in Australia. However, similar challenges are expected all across the world, due to the scarcity of rainfall and flood measurement gauges.

Floodway designers can apply similar framework to estimate the flood discharges instead of current practice of trial and error process. This will provide more scientific and reliable estimation and assessment process.

One of the social impacts identified in the broader research is the community outrages and disagreement between floodway design engineers and the community. Following the developed framework in the manuscript, design engineers will be able to justify their assumptions and design work.

The paper presents a novel framework on collating different and scattered information towards estimating flood discharges in rural areas. The manuscript presents the first insights on estimated flood discharges in the selected case study area during the 2011 and 2013 Queensland flood events. This will enable further research to be performed in a quantitative manner rather than the present approach of qualitative manner.

Current methods for floodway design are predominately based on hydrological and hydraulic design principles. The purpose of this paper is to investigate a finite element methods approach for the inclusion of a simplified structural design method into floodway design procedures.

This research uses a three-dimensional finite element method to investigate numerically the different parameters, geometric configurations and loading combinations which cause floodway vulnerability during extreme flood events. The worst-case loading scenario is then used as the basis for design from which several structural design charts are deduced. These charts enable design bending moments and shear forces to be extracted and the cross-sectional area of steel and concrete to be designed in accordance with the relevant design codes for strength, serviceability and durability.

It was discovered that the analysed floodway structure is most vulnerable when impacted by a 4-tonne boulder, a 900 mm cut-off wall depth and with no downstream rock protection. Design charts were created, forming a simplified structural design process to strengthen the current hydraulic design approach provided in current floodway design guidelines. This developed procedure is demonstrated through application with an example floodway structural design.

The deduced structural design process will ensure floodway structures have adequate structural resilience, aiding in reduced maintenance and periods of unserviceability in the wake of extreme flood events.

The plethora of contributions to social learning has resulted in a wide range of interpretations, meanings and applications of social learning, both within and across disciplines. However, advancing the concept and using social learning methods and tools in areas like disaster-shocks requires interdisciplinary consolidation of understandings. In this context, the primary focus of this paper is on the contributions of social learning to disaster risk reduction (DRR).

By applying a three-round policy Delphi process involving 18 purposefully selected scholars and expert-practitioners, the authors collected data on the meanings of social learning for two groups of professionals, DRR and social-ecological resilience. The survey instruments included questions relating to the identification of the core elements of social learning and the prospects for enhancing social-ecological resilience.

The results revealed strong agreement that (1) the core elements of social learning indicate a collective, iterative and collaborative process that involves sharing/networking, changes in attitudes and knowledge and inclusivity; (2) social learning from disasters is unique; and (3) linkages between disciplines can be built by promoting interdisciplinarity, networks and knowledge platforms; collaboration and coordination at all levels; and teaching and practicing trust and respect. Social learning is useful in preparing for and responding to specific disaster events through communication; sharing experience, ideas and resources; creating synergies for collective action and promoting resilience.

The policy Delphi process involved a limited number of participants to control the quality of the data. To the best of the authors’ knowledge, this paper is the first of its kind to identify the core elements of social learning, specifically, in the disaster-shock context. It also makes significant contributions to the interdisciplinary integration issues.

The practical implications of this study are related to pre-disaster planning and mitigation through the application of social learning on disaster-shocks.

The social implications of this study are related to valuing social learning for the improvement of disaster planning, management, and policy formulation and implementation in reducing disaster risks.

The study provides a consensus view on the core elements of social learning and its role in DRR and resilience building. Relevant to all stages of DRR, social learning is best characterized as a collective, iterative and collaborative process. It can be promoted by enhancing networking and interdisciplinarity.

Home buyout programs are typically funded by the federal government and implemented by local agencies. How these agencies design and implement buyouts has considerable impacts on participating households and communities, making understanding the internal processes of implementing agencies a critical component of buyout research. This study addresses this issue by exploring the early design and implementation phases of a buyout program in Harris County, Texas, following Hurricane Harvey.

Data were collected via semi-structured interviews with buyout staff and government stakeholders. Data were analyzed in two phases using grounded theory methodology and holistic coding.

There was considerable tension regarding the role of buyouts in mitigation and recovery. Participants conceptualized buyouts as mitigation programs, but recognized that residents, in contrast, viewed buyouts as a tool for household recovery.

This study adds to questions raised in the literature about the efficacy of buyouts and other relocation efforts implemented in response to disasters and global climate change. Future research should work to build systematic knowledge regarding design, implementation, and impacts of buyouts on affected households and communities.

Tension in the purpose of buyouts may be the cause of consistent shortcomings in buyout implementation including attrition, checkerboarding, and transfer of risk. Funding, timing, and the scale of buyouts do not align with household recovery needs and priorities, limiting the mitigation potential of buyouts.

This study identifies a fundamental tension in the purpose of buyout programs that has yet to be discussed in the literature.

This chapter discusses some issues of diversity in hazard mitigation when just recovery is considered or not. Justice in hazard mitigation becomes crucial considering unequal distribution of resources, systemic racism, and social vulnerability to hazards. While there has been research on just recovery, there is little or no evidence of research that examines the issue of equity and justice in hazard mitigation, This chapter discusses what hazard mitigation is, the Disaster Mitigation Act of 2000 focusing on the planning process, public involvement in the planning process, some planning theories on vulnerability, and building the case for achieving and striving for justice and equity in promoting diversity in hazard mitigation. The chapter makes some recommendation on how to achieve diversity in hazard mitigation.

The chapter focuses on how engaging undergraduate and graduate students at a metropolitan university through community-based experiential learning can help them make a difference in their personal relationships, in their workplaces and in their communities.

The chapter explores the University of Arkansas at Little Rock Department of Speech Communication’s integrated approach to undergraduate and graduate curriculum that focuses on four types of casing complex problems and making positive, ethical recommendations to make a difference. Specifically, the chapter explores how problem-based learning; service-learning; narrative ethnography; and research projects can be used as meaningful ways to case complex communication issues and to make ethical, theory-informed recommendations to not only do no harm but also affect positive change and promote social justice in students’ personal relationships, organizations, and communities.

Lessons learned from the programmatic approach are shared that include building a theoretical base for students to draw from, integrating case approaches into the curriculum, and engaging resistance and failure. Chapter recommendations promote using theory as a lever for learning, building meaningful relationships with stakeholders, and adopting a process orientation that embraces failure.

The chapter offers a review of four undergraduate courses and four graduate courses, with explicit applications of the four case approaches. Additionally, learning objectives, major assignment descriptions, and assessment approaches are detailed for each course.

This study aims to support the development risk management strategies towards improving the resilience of assets located in the estuary and lower level of the Swan River, Western Australia. The study evaluated the key role of Federal/State policies in adaptation planning and the communication and interface between various stakeholders, including State/Local governments, construction professionals, property developers and landowners.

The study applied a mixed research approach through a questionnaire survey followed by an in-depth interview involving local construction experts. Collected data were analysed following the grounded theory methodology style of data analysis.

The findings revealed a convoluted understanding of communication networks and responsibility for owning the future risks between relevant stakeholders. As a result, a framework illustrating clear process and roles in mitigating risk and implementing adaptive asset management measures has been formulated and presented in this study.

Scientific evidence suggested that sea-level rise and increased frequency of major coastal flooding events are inevitable as early as 2100, and having a comprehensive risk management plan of assets to anticipate climate risks and to improve urban resilience is essential. The proposed framework is aimed at local stakeholders in improving current state of communication and adaptation planning as a pathway to develop a robust risk management strategy.

Floods are among the most significant and frequent hazards to affect communities in the downstream part of the Ba River in Western Viti Levu, Fiji Islands. They often leave in their wake displacements and death putting thousands at risk of sliding into poverty. Using the recent 2009 and 2012 floods, we examine how social capital aids in post-disaster response and recovery among residents in five selected villages in the downstream communities of the Ba River. Data were collected from a questionnaire survey administered to 97 households and semi-structured interviews with a further 20 respondents. It is conventionally believed that moving supplies, aid and expertise into flood-affected areas offers the best path to effective response and recovery. By contrast, our results indicate that residents of downstream communities in Ba District are using four approaches to create and deploy social capital among them to facilitate disaster response. The patterns of social capital used for effective response include practices of search and rescue, information, mutual assistance and commercial cooperation. Such strategies help to build resilience at household and community levels and reduce risks of loss of life and costly damage to property. The findings can be used to generate policies concerning the integration of social capital as a component of flood disaster response and recovery mechanisms.

Safe-to-fail (SF) is an emerging resilient design approach that has the potential to minimize the severity of flood damages. The purpose of this study is to explore the SF design strategies to reduce flood disaster damages in US coastal cities. Therefore, this study addresses two research questions: identifying the most suitable SF criteria and flood solution alternatives for coastal cities from industry professionals’ perspective; and investigating the controlling factors that influence the AEC students’ interest to learn about SF concepts through the curricula.

This study used the analytical hierarchy process to evaluate the SF criteria and flood solutions where data were collected through surveying 29 Department of Transportation professionals from different states. In addition, the study adopted a quantitative methodology by surveying 55 versed participants who reside in a coastal area and have coastal flood experiences. The data analysis included ordinal probit regression and descriptive analysis.

The results suggest that robustness is the highest weighted criterion for implementing SF design in coastal cities. The results demonstrated that ecosystem restoration is the highest-ranked SF flood solution followed by green infrastructure. Moreover, the results highlighted that age, duration spent in the program and prior knowledge of SF are significantly related to AEC students’ interest to learn this concept.

SF design anticipates failures while designing infrastructures thus minimizing failure consequences due to flood disasters. The findings can facilitate the implementation of the SF design concept during the construction of new infrastructures in coastal cities as well as educate the future workforces to contribute to developing resilient built environments.