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Drought Vulnerability Assessment Using Geospatial Techniques in Southern Queensland, Australia
Muhammad Hoque1,2, Biswajeet Pradhan1,3, Naser Ahmed2
1Centre for Advanced Modelling and Geospatial Information Systems (CAMGIS), Faculty of Engineering and IT, University of Technology Sydney, Ultimo, NSW 2007, Australia.
Sensors (Basel, Switzerland)
|October 26, 2021
Summary
Southern Queensland faces significant drought vulnerability, with nearly 80% of the region moderately to extremely affected. This study mapped drought vulnerability to aid in developing mitigation strategies.
Area of Science:
- Environmental Science
- Agricultural Science
- Socio-economics
Background:
- Droughts are recurring events in Australia, significantly impacting environmental, agricultural, and socio-economic activities.
- Southern Queensland is identified as a highly drought-prone region requiring comprehensive vulnerability assessment.
Purpose of the Study:
- To create a comprehensive drought vulnerability map for southern Queensland using geospatial techniques.
- To assess the spatial extent of drought vulnerability across meteorological, hydrological, and agricultural categories.
Main Methods:
- Selected 14 drought-influencing criteria across three categories: meteorological, hydrological, and agricultural.
- Utilized the fuzzy analytical hierarchy process (FAHP) for weighting criteria and spatial analysis.
- Generated individual and a combined overall drought vulnerability map.
Main Results:
- Approximately 79.60% of southern Queensland exhibits moderate to extreme drought vulnerability.
- The study successfully validated findings using the receiver operating characteristics curve (ROC) and area under the curve (AUC) with historical drought data.
Conclusions:
- The developed drought vulnerability map provides crucial insights for decision-makers in southern Queensland.
- Findings support the implementation of proactive and targeted drought mitigation strategies to reduce negative impacts.
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