@article {bnh-7922, title = {Improving the resilience of existing housing to severe wind events - final project report}, number = {656}, year = {2021}, month = {03/2021}, institution = {Bushfire and Natural Hazards CRC}, address = {Melbourne}, abstract = {

This BNHCRC project titled:\  Improving the resilience of existing housing to severe wind events prescribes practical structural retrofits that will make improvements to the performance of Pre-80s (Legacy) houses in windstorms as well as measures to reduce damage and loss to contemporary houses.

Damage investigations carried out by the Cyclone Testing Station (CTS) following severe windstorms have typically shown that houses built prior to the mid-1980s in Australia perform worse than houses constructed to contemporary building standards, during windstorms. Given that these older houses are a significant proportion of the housing stock, practical structural upgrading based on the latest research may improve performance of housing and the economic and social wellbeing of a community.

Some details for structural retrofitting currently exist, but their uptake is limited, and there is also evidence that these are not carried out when houses require repairs following severe storms. Therefore, the issues of retrofitting legacy housing, including feasibility and benefit-cost are analysed in this project.

The primary objective of this study was to identify vulnerable legacy house types across Australia and develop cost-effective retrofits for mitigating damage during windstorms. These evidence-based strategies will (a) aid policy formulation and decision making by Government and industry, and (b) provide guidelines detailing various options and benefits to homeowners and the industry for retrofitting typical at-risk houses in Australia. The main aims were to:

This report presents an overview of the research approach used for this project including the selection of house types, the development of the VAWS software and the Internet-based guidelines. A case study is presented of the vulnerability and benefit cost assessment of one of the selected house types, with the complete set of results presented in the Appendices. These results show that tile roofed houses in cyclonic regions of Australia benefit the most from retrofitting for severe wind events. The benefit-cost ratios for these tile roof houses and other house types are expected to improve when accounting for intangible costs, which are currently not included in the analyses presented in this report. In addition, examples of the impacts and utilisation of this project including the Queensland Government Housing Resilience Program are also presented.

}, keywords = {cyclone, events, existing housing, resilience, severe, wind}, issn = {656}, author = {John Ginger and Korah Parackal and David Henderson and Martin Wehner and Hyeuk Ryu and Mark Edwards} } @article {bnh-6977, title = {Australian inquiries into natural hazard events: Recommendations relating to urban planning for natural hazard mitigation (2009-2017)}, number = {571}, year = {2020}, month = {06/2020}, institution = {Bushfire and Natural Hazards CRC}, address = {Melbourne}, abstract = {

This document reports on an assessment of major Australian post disaster and emergency event inquiries and reviews from the past 10 years in terms of recommendations relating to the integration of urban planning and natural hazard mitigation.

Findings from this review must be understood in the context of inquiries {\textendash}examinations of events seeking mainly to identify problems and areas for improvement.\  Accordingly, the recommendations do not typically highlight successes or existing strengths, even while these may be well understood and recognised by those involved. Additionally, this report has avoided making detailed assessments of the numbers of various recommendation types, given the uneven distribution of a relatively low number of events. Nonetheless, the emphases upon certain areas and omission of others suggest areas for future improvement.

}, keywords = {events, inquiries, mitigation, Natural hazards, urban planning}, issn = {571}, author = {Alan March and Leonardo Nogueira de Moraes and Graeme Riddell and Dovers, Steve and Janet Stanley and Hedwig van Delden and Ruth Beilin and Holger Maier} } @article {bnh-6665, title = {Australian inquiries into natural hazard events}, number = {544}, year = {2018}, month = {11/2018}, institution = {Bushfire and Natural Hazards CRC}, address = {Melbourne}, abstract = {

This is the second research report for the Integrated Urban Planning for Natural Hazard Mitigation BNH-CRC project and constitutes a preliminary assessment of selected current approaches to integrating urban planning and natural hazard mitigation. Major post-event inquiries can play an important role in pushing for the reform of current urban planning arrangements to target disaster risk reduction. This was evident in the implementation of the Bushfire Management Overlay (see Appendix 1) and related statutory mechanisms in the State of Victoria after the 2009 Bushfires. Furthermore, recommendations can shed light on areas perceived as gaps during wider assessments of causes and contributory factors relating to major hazard events. Therefore, a review of urban-planning-related recommendations following major post-event inquiries and reviews across all-natural hazards will form the basis of this report, considering the role of urban planning in reducing emergent and legacy risks associated with the built environment.

The form of post-event inquiries varies widely, from the focused, technical and brief, to wide-ranging and lengthy such as those carried out by a Royal Commission (Eburn \& Dovers, 2015). While the recommendations of inquiries are very rarely binding on governments, they nonetheless carry significant weight and implementation is the norm. There were 142 post-event inquiries in Australia between 2009 and 2017, constituting by far the largest body of evaluation data regarding actual or perceived issues in disaster prevention, preparedness, response and recovery. This report begins to explore those recommendations from 55 major inquiries that relate to urban planning (Cole, Dovers, Eburn, \& Gough, 2017; Cole, Dovers, Gough, \& Eburn, 2018).

In this context, a preliminary assessment of urban-planning-related recommendations put forward by major post-event inquiries and reviews proved a worthwhile undertaking as the first step into understanding current approaches to integrating urban planning and natural hazard mitigation in the past 10 years.

The assessment of these recommendations was informed by the analytical framework developed in the first research report for this project, developed through a review of relevant literature and in consultation with end-users. This analytical framework proposed a set of elements of an approach to integration, and a general list of urban planning tools and another of urban planning treatments of risk that can be used to support natural hazard mitigation.

Assessing urban-planning-related recommendations against the set of categories proposed in this analytical framework targeted both the mapping of these recommendations to unveil concentrations as well as the testing and expansion of the framework through its first practical application.

Findings from this preliminary assessment will inform the next stage of this research project which consists in the assessment of specific Australian and international case studies. The former will provide an opportunity to contrast recommendations with implemented integration while the later holds potential for an expansion of possibilities to integration to those already being employed in Australia.

}, keywords = {events, inquiries, mitigation, Natural hazards, urban planning}, issn = {544}, author = {Alan March and Leonardo Nogueira de Moraes and Graeme Riddell and Dovers, Steve and Janet Stanley and Hedwig van Delden and Ruth Beilin and Holger Maier} }