Recurrence intervals of meteorological drought events across eastern Australia: implications for disturbed landscapes

Halwatura, Devanmini, Lechner, Alex M. and Arnold, Sven (2014). Recurrence intervals of meteorological drought events across eastern Australia: implications for disturbed landscapes. In: Zakaria Hossain and Jim Shiau, Proceedings of Fourth International Conference: GEOMATE 2014. Geotechnique, Construction Materials and Environment. GEOMATE2014: 4th International Conference on Geotechnique, Construction Materials and Environment, Springfield, QLD, Australia, (416-420). 19-21 November, 2014.

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Name Description MIMEType Size Downloads
Author Halwatura, Devanmini
Lechner, Alex M.
Arnold, Sven
Title of paper Recurrence intervals of meteorological drought events across eastern Australia: implications for disturbed landscapes
Conference name GEOMATE2014: 4th International Conference on Geotechnique, Construction Materials and Environment
Conference location Springfield, QLD, Australia
Conference dates 19-21 November, 2014
Proceedings title Proceedings of Fourth International Conference: GEOMATE 2014. Geotechnique, Construction Materials and Environment
Place of Publication Tsu City, Mie, Japan
Publisher GEOMATE International Society
Publication Year 2014
Year available 2014
Sub-type Fully published paper
Open Access Status
ISBN 9784990595838
Editor Zakaria Hossain
Jim Shiau
Start page 416
End page 420
Total pages 5
Collection year 2014
Language eng
Formatted Abstract/Summary
Droughts are one of the most devastating natural hazards, often causing severe economic and environmental damage. Across Eastern Australia climate is highly variable and frequent floods and droughts affect large areas over prolonged periods of time. Understanding the variations and trends in these weather extremes is critical for ecologists to assess the adequacy of management plans for anthropogenically affected landscapes such as agricultural or post-mining land, where water often plays a critical role for ecosystem persistence.

This study focuses on analysing drought events of four selected locations (Cairns, Melbourne, Wagga Wagga, Quilpie) across Eastern Australia using the Reconnaissance Drought Index (RDI). We used monthly total rainfall and evaporation data of the past 40 years (1972-2013) to identify drought events. We categorised the drought events according to their severity and duration and analysed separately the historic time series as two parts of 20 years (1972-1992 and 1993-2013). We calculated the recurrence intervals of droughts to assess trends in the occurrence of drought events. Results show that the recurrence intervals of Melbourne and Quilpie barely changed over time, while the drought recurrence intervals decreased in Wagga Wagga and Cairns. These findings have critical implications for any rehabilitation and management plans for post-mining and agricultural land.
Keyword Drought
Reconnaissance drought index
Recurrence intervals
Land rehabilitation
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 25 Jul 2014, 11:42:31 EST by Dr Sven Arnold on behalf of Centre For Mined Land Rehabilitation