@article {bnh-5476, title = {Flash flood fatalities in NSW, VIC, ACT and South East QLD from 1 January 2000 to 30 June 2017}, number = {470}, year = {2019}, month = {03/2019}, institution = {Bushfire and Natural Hazards CRC}, address = {Melbourne}, abstract = {

In terms of lives lost, floods are second only to heatwaves (Coates, 1996; Coates et al 2014), and are one of the top three natural hazards in terms of cost and damage caused, disrupting the functioning of businesses and communities due to\ \ \  building\  \ and\  \ infrastructure\  \ damage.\  \ In\  \ terms\  \ of\  \ reducing\  \ human casualties, \ flash \ floods \ pose \ a \ unique \ challenge \ to \ emergency \ responders and emergency management. Consideration must be given to the efficacy of public education campaigns and warnings, the relative risks occupants face inside and outside the dwelling and the behaviour of individuals during flood events.

The current report builds on that carried out by Risk Frontiers for the New South Wales \ State \ Emergency\  Service \ [Haynes \ et \ al, \ 2009], \ which \ examined \ the fatality and injury record for Australian flash flood events from 1950 to 2008. It also continues the work done for the floods component of the Bushfire and Natural Hazards Co-operative Research Centre (BNHCRC) project, {\textquotedblleft}An analysis of human fatalities and building losses from natural disasters in Australia{\textquotedblright} [see Haynes et al, 2016]. The current research focuses on the circumstances surrounding fatalities resulting from flash flood events in New South Wales (NSW) from 1 January 2000 to 30 June 2017. To enable comparisons to be made, a few other jurisdictions were examined. The aim is to identify those most at risk and \ any \ trends \ in \ recent \ flash \ flood \ events \ in \ order\  \ to \ inform \ policy development by the NSW SES.

}, keywords = {Emergency management, Flood, flood management, health and safety, risk management}, author = {Coates, Lucinda and James O{\textquoteright}Brien and Andrew Gissing and Katharine Haynes and Rebecca D{\textquoteright}Arcy and Chloe Smith and Deirdre Radford} } @article {bnh-5646, title = {River reconstruction using a conformal mapping method}, journal = {Environmental Modelling \& Software}, volume = {119}, year = {2019}, month = {06/2019}, pages = {197-213}, abstract = {

Accurate river bathymetry is required for applications including hydrodynamic flow modelling and understanding morphological processes. Bathymetric measurements are typically a set of depths at discrete points that must be reconstructed into a continuous surface. A number of algorithms exist for this reconstruction, including spline-based techniques and kriging methods. A novel and efficient method is introduced to produce a co-ordinate system fitted to the river path suitable for bathymetric reconstructions. The method is based on numerical conformal mapping and can handle topological features such as islands and branches in the river. Bathymetric surfaces generated using interpolation over a conformal map are compared to spline-based and kriging methods on a section of the Balonne River, Australia. The results show that the conformal mapping algorithm produces reconstructions comparable in quality to existing methods, preserves flow-wise features and is relatively insensitive to the number of sample points, enabling faster data collection in the field.

}, keywords = {Conformal mapping, Depth reconstruction, flood management, River bathymetry, Spatial interpolation}, issn = {1364-8152}, doi = {https://doi.org/10.1016/j.envsoft.2019.06.006}, url = {https://www.sciencedirect.com/science/article/pii/S1364815219301082}, author = {James Hilton and Stefania Grimaldi and Cohen, R and Garg, N and Yuan Li and Marvanek, S and Valentijn Pauwels and Jeffrey Walker} } @article {bnh-6308, title = {Extreme floods and river values: A social{\textendash}ecological perspective}, journal = {River Research and Applications}, year = {2018}, month = {08/2018}, pages = {1-11}, abstract = {

The social{\textendash}ecological status of rivers is particularly pronounced during extreme flood events. Extreme floods are a substantial threat to people, infrastructure, and livelihoods. Efforts to address the threats of extreme floods are aligned largely with social values of flood risk mitigation, flood preparation, and avoidance of loss. However, extreme floods are also a fundamental driver of river ecosystems, aligned with ecological (biophysical) values of event effectiveness, river change, disturbance, biotic response, and heterogeneity. A survey of the public perceptions of extreme floods revealed that participants generally understood the ecological values of extreme floods through concepts of naturalness, climate change, and knowledge production. However, participants had less understanding of how river integrity might influence the response of rivers to extreme floods. Resilience can be used as a framework for uniting the social and ecological values of extreme floods because it embodies a common language of change, disturbance, and adaptation and complements the socially dominated discourse of risk and emergency management. Three strategies are given for river scientists to frame ecological values in parallel with the paradigms of the socially dominated discourse of extreme floods: be prepared to act following an extreme flood disaster, learn and use the language of the flood risk and emergency management sector, and undertake assessments of the ecological values of extreme floods to highlight the threats to those values that may occur with climate change and river modification.

}, keywords = {disasters, disturbance ecology, flood management, resilience, risk}, doi = {https://doi.org/10.1002/rra.3355}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/rra.3355}, author = {Melissa Parsons} }