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Type: Conference paper
Title: Investigation into the joint dependence between extreme rainfall and storm surge in the coastal zone
Author: Westra, S.
Citation: Proceedings of the 34th World Congress of the International Association for Hydro- Environment Research and Engineering: 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering, 2011 E. Valentine, et al. (eds.): pp.543-550
Publisher: Engineers Australia
Publisher Place: Barton, A.C.T
Issue Date: 2011
ISBN: 9780858258686
Conference Name: World Congress of the International Association for Hydro-Environment Research and Engineering (34th : 2011 : Brisbane, Australia)
Statement of
S. Westra
Abstract: In the coastal zone, flooding often can be caused by two physically distinct mechanisms: ocean-derived storm tides (being the combination of storm surge and astronomical tide), and inland rainfall-derived catchment discharge. Although astronomical tides vary independently from rainfall, storm surge is governed by pressure and wind anomalies and thus can be triggered by similar meteorological conditions to those which cause intense rainfall events. The degree of interaction between rainfall and storm surge is therefore an important design parameter, with assumptions of independence or complete dependence likely to lead to under- or over-estimation, respectively, of flood quantiles in the joint probability zone. This paper describes the extent of interaction between rainfall and storm surge, with a view to ultimately providing guidance on how these two variables should be combined to estimate flood risk in locations affected by both of these flood-producing mechanisms. The outcomes of this research show that this interaction can be detected at multiple locations along the east Australian coast line, and is influenced by factors such as storm burst duration and the lag between the extreme rainfall event and the extreme storm surge event.
Keywords: Storm surges
coastal zone management
environmental aspects
extreme value theory
mathematical models
Rights: © Engineers Australia
Description (link):;dn=321414049627836;res=IELENG
Appears in Collections:Aurora harvest
Civil and Environmental Engineering publications
Environment Institute publications

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