Articles | Volume 29, issue 18
https://doi.org/10.5194/hess-29-4341-2025
https://doi.org/10.5194/hess-29-4341-2025
Research article
 | 
15 Sep 2025
Research article |  | 15 Sep 2025

Global assessment of socio-economic drought events at the subnational scale: a comparative analysis of combined versus single drought indicators

Sneha Kulkarni, Yohei Sawada, Yared Bayissa, and Brian Wardlow

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Cited articles

Bachmair, S., Stahl, K., Collins, K., Hannaford, J., Acreman, M., Svoboda, M., Knutson, C., Smith, K. H., Wall, N., Fuchs, B., Crossman, N. D., and Overton, I. C.: Drought indicators revisited: the need for a wider consideration of environment and society, WIREs Water, 3, 516–536, https://doi.org/10.1002/wat2.1154, 2016. 
Bayissa, Y., Srinivasan, R., Joseph, G., Bahuguna, A., Shrestha, A., Ayling, S., Punyawardena, R., and Nandalal, K. D. W.: Developing a Combined Drought Index to Monitor Agricultural Drought in Sri Lanka, Water (Switzerland), 14, 3317, https://doi.org/10.3390/w14203317, 2022. 
Bayissa, Y. A., Tadesse, T., Svoboda, M., Wardlow, B., Poulsen, C., Swigart, J., and Van Andel, S. J.: Developing a satellite-based combined drought indicator to monitor agricultural drought: a case study for Ethiopia, GIsci. Remote Sens., 56, 718–748, https://doi.org/10.1080/15481603.2018.1552508, 2019. 
Bhanage, V., Lee, H. S., Kubota, T., Pradana, R. P., Fajary, F. R., Arya Putra, I. D. G., and Nimiya, H.: City-Wise Assessment of Suitable CMIP6 GCM in Simulating Different Urban Meteorological Variables over Major Cities in Indonesia, Climate, 11, 100, https://doi.org/10.3390/cli11050100, 2023. 
Bhunia, P., Das, P., and Maiti, R.: Meteorological Drought Study Through SPI in Three Drought Prone Districts of West Bengal, India, Earth Systems and Environment, 4, 43–55, https://doi.org/10.1007/s41748-019-00137-6, 2020. 
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Short summary
How drought impacts communities is complex and not yet fully understood. We examined a disaster dataset and compared various drought measures to pinpoint affected regions. Our new combined drought indicator (CDI) was found to be the most effective in identifying drought events compared to other traditional drought indices. This underscores the CDI's importance in evaluating drought risks and directing attention to the most impacted areas.
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