The CSIRO Climate Extremes Adaptation Cluster is investigating strategies for coping with climate change for new and existing water infrastructure. It focuses on generic guidelines for small water infrastructure (eg. culverts and bridges) to find the optimal economic upgrade strategies (eg. upgrade now, upgrade later, incremental upgrades) when incorporating (spatially varying) climate change effects over Australia. This conference paper will present CDF curves of elevation for various urbanised areas in eastern Australia that have been subject to recent flooding. This paper evaluates the feasibility of developing generalised elevation CDF curves applicable for an entire urbanised area under consideration (i.e. suburb-wide elevation CDF curves). It also builds upon research in the geomorphology community that has provided general solutions to elevation distributions in catchments. The curves are developed using a recently available nation-wide and high-quality DEM data set (~30m horizontal resolution, sub 1m vertical). Construction of a generalised elevation CDF curve was found to be feasible. The elevation CDF curve is a step towards future work that will construct flood vulnerability curves to enable economic analysis of adaptation strategies. Vulnerability curves define the damage due to the occurrence of a hazard (e.g. economic damage to a building as a function of flood height). Thus, future work to develop generalised flood vulnerability curves should be possible, enabling economic analysis without the need for detailed site-specific analyses – to underpin decision making on small infrastructure where site-specific analysis is unlikely to be warranted or feasible.
Hydrology and Water Resources Symposium 2014. Hydrology and Water Reources Symposium 2014: Conference Proceedings (Perth, WA 24-27 Feburary, 2014) p. 469-476