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Development of drought severity-duration-frequency curves in Victoria, Australia

Rahmat, Siti Nazahiyah and Jayasuriya, Niranjali and Bhuiyan, Muhammed (2015) Development of drought severity-duration-frequency curves in Victoria, Australia. Australian Journal of Water Resources, 19 (1). pp. 31-41. ISSN 1324-1583

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Abstract

One of the many utays in preparing for drought is to carry out a drought risk assessment by characterisation of the frequency, severity and duration of n drought. Therefore, the current study aimed at the development of safety-duration-frequency (SDF) curves to provide a comprehensive characterisation of the droughts for 10 selected stations in Victoria, Australia.The development of the frequency curves is based on the precipitation deficits which were computed based on the Standardised Participation Index (SPI). Instead of using SPl values, the precipitation thresholds were use to complete the severity of the droughts. This would be very helpful in delivering information that can be understood easily by ordinary users and decision-makers. The SDF curves were developed using the partial duration series (PDS) technique. Log Pearson Type III distribution was chosen and fitted well to the precipitation deficits for different durations of drought. Overall, SDF curues were succesfully derived for 10 stations in Victoria and can provide useful information for medium/long term planning, such as in planning irrigation supply and developing drought relief policies.

Item Type: Article
Uncontrolled Keywords: Log Pearson Type III distribution; partial duration series (PDS); severity-duration-frequency (SDF); standardised precipitation index (SPI)
Subjects: Q Science > QC Physics
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 11 Nov 2015 06:47
Last Modified: 11 Nov 2015 06:47
URI: http://eprints.uthm.edu.my/id/eprint/6998
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