Investigating drought duration-severity-intensity characteristics using the Standardized Precipitation-Evapotranspiration Index: case studies in drought-prone Southeast Queensland
Article
Article Title | Investigating drought duration-severity-intensity characteristics using the Standardized Precipitation-Evapotranspiration Index: case studies in drought-prone Southeast Queensland |
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ERA Journal ID | 4231 |
Article Category | Article |
Authors | Dayal, Kavina S. (Author), Deo, Ravinesh C. (Author) and Apan, Armando A. (Author) |
Journal Title | Journal of Hydrologic Engineering |
Journal Citation | 23 (1), p. 05017029 |
Number of Pages | 16 |
Year | 2018 |
Place of Publication | United States |
ISSN | 1084-0699 |
1943-5584 | |
Digital Object Identifier (DOI) | https://doi.org/10.1061/(ASCE)HE.1943-5584.0001593 |
Web Address (URL) | http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29HE.1943-5584.0001593 |
Abstract | Drought characterization is crucial for identifying impacts on irrigation, agriculture, hydrologic engineering, and water resources management. This case study demonstrates the scientific relevance of the standardized precipitation-evapotranspiration index (SPEI) as a robust drought metric that incorporates influence of supply-demand balance. Using long-term data, the SPEI was calculated at multiple timescales to identify historical water deficit periods in selected drought-prone case study regions in southeast Queensland, Australia. The drought duration (D; number of months with continuously negative SPEI representing below average water resources), severity (S; accumulated negative SPEI in a drought-identified period), intensity (I; minimum SPEI), and return periods were enumerated for iconic dry events over multiple (1-, 3-, 6-, 9-, 12-, and 24-month) timescales. The SPEI was evaluated with corresponding drought indicators (precipitation and soil moisture) and climatological Rainfall Anomaly Index to yield drought severity information from a meteorological perspective. The results showed disparities in duration, severity, and intensity (D–S–I) of different droughts among the case study regions; reaffirming the significance of SPEI for regional drought impact assessment. Accordingly, this case study advocates SPEI as a convenient metric for detecting drought onsets and terminations, including drought ranking and recurrence evaluations that are vital statistics in hydrologic engineering. |
Keywords | Standardized Precipitation-Evapotranspiration Index; drought duration; severity; intensity; return period; multiscalar drought index; run-sum method |
ANZSRC Field of Research 2020 | 370704. Surface water hydrology |
370903. Natural hazards | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | School of Agricultural, Computational and Environmental Sciences |
Institute for Agriculture and the Environment | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q475x/investigating-drought-duration-severity-intensity-characteristics-using-the-standardized-precipitation-evapotranspiration-index-case-studies-in-drought-prone-southeast-queensland
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