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Using high-resolution regional climate projections to investigate the impact of climate change on flood inundation: a case-study from Tasmania

conference contribution
posted on 2023-05-23, 09:37 authored by Brown, KAS, Christopher White, Peterson, J, West, N, Ling, F
Changes to design flood hydrographs were assessed using projected changes to the magnitude of extreme rainfall events as a result of climate change. The Climate Futures for Tasmania (CFT) project has produced dynamically downscaled high-resolution climate change projections for Tasmania using the CSIRO Conformal Cubic Atmospheric Model (CCAM). The impact of climate change on flood levels was assessed for selected Tasmanian catchments, namely the lower reaches of the Huon River, Derwent River, Forth River and Mersey River. A series of design flood hydrographs for the 1:10, 1:50, 1:100 and 1:200 annual exceedance probability (AEP) events have been produced for the observed 1961-1990 period, then scaled for three future periods (2010-2039, 2040-2069 and 2070-2099) using the CFT projections. MIKE 11 and MIKE 21 hydraulic models were run for each of the selected catchments and each of the design floods. Results from MIKE 11 and MIKE 21 were used to generate flood inundation maps for use by the Tasmanian State Emergency Services (SES).

History

Publication title

Proceedings of the 34th International Association for Hydro-Environment Engineering and Research World Congress 34th IAHR World Congress 2011

Editors

EM Valentine

Pagination

1-8

ISBN

9780858258686

Department/School

Institute for Marine and Antarctic Studies

Publisher

Engineers Australia

Place of publication

Barton, ACT

Event title

The 34th IAHR World Congress 33rd Hydrology and Water Resources Symposium

Event Venue

Brisbane, Australia

Date of Event (Start Date)

2011-06-26

Date of Event (End Date)

2011-07-01

Rights statement

Copyright unknown

Repository Status

  • Restricted

Socio-economic Objectives

Effects of climate change on Australia (excl. social impacts)

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