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|Title:||Flood risk estimation in Australia’s coastal zone: modelling the dependence between extreme rainfall and storm surge|
|Citation:||Proceedings of the 35th Hydrology and Water Resources Symposium 2014, 2014 / pp.390-396|
|Conference Name:||35th Hydrology and Water Resources Symposium (20 Feb 2014 - 27 Feb 2014 : Perth, Australia)|
|Feifei Zheng, Seth Westra, Scott Sisson, Michael Leonard|
|Abstract:||This paper provides a proposed methodology for estimating flood risk in situations where the potential exists for floods to be caused by the combination of catchment-derived flows from an extreme rainfall event together with elevated ocean water levels. The statistical basis of the methodology has been developed over a period of three years of research as part of Project 18 of the Australian Rainfall and Runoff revision. The methodology has the following elements: (1) assessment of whether a joint probability analysis is required, based on a pre-screening analysis; (2) estimation of the strength of dependence between extreme rainfall and storm surge, which will be based on the location of the catchment and the storm burst duration; (3) estimation of a set of flood levels corresponding to different combinations of rainfall and storm surge; and (4) estimation of the design flood levels based on the dependence parameter and the set of flood levels. This paper describes the overall methodology, provides an Australia-wide map of dependence parameters corresponding to different storm burst durations, and illustrates the methodology using a case study.|
|Rights:||© Engineers Australia 2014|
|Appears in Collections:||Civil and Environmental Engineering publications|
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