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Assessing the Effect of Future Climate Change on Drought Characteristics and Propagation from Meteorological to Hydrological Droughts—A Comparison of Three Indices

Author

Listed:
  • Kashish Sadhwani

    (Indian Institute of Technology Bombay)

  • T. I. Eldho

    (Indian Institute of Technology Bombay
    Indian Institute of Technology Bombay)

Abstract

This study delves into the potential impacts of climate change on meteorological and hydrological droughts in the Western Ghats region of South India, a large and humid tropical region. Utilizing three drought indices—the Standardized Precipitation Index (SPI), Standardized Precipitation Evapotranspiration Index (SPEI), and Standardized Runoff Index (SRI), we assessed the historical drought patterns and projected future scenarios under different Representative Concentration Pathway (RCP) scenarios (4.5 and 8.5). This comprehensive analysis encompassed three future time segments (near: 2021–2040, mid: 2041–2070, far: 2071–2100) and compared results with a base period (1989–2018). The study demonstrated that drought propagation is notably faster (around 3 months) in wet, humid tropical regions, highlighting the urgency of understanding its dynamics. Furthermore, the findings indicate that droughts are expected to increase in count and severity (> 100%) in the Western Ghats in future, accompanied by an accelerated propagation rate (around 2 months), with recovery rates for hydrological droughts being notably swift in this region. The study emphasizes the significant influence of regional conditions on drought propagation, leading to variations in its characteristics. Additionally, it underscores the potential of Pearson correlation analysis in providing approximate results for estimating drought propagation periods in the wet, humid tropical regions. These findings are significant in formulating effective risk mitigation and adaptation strategies to address the mounting challenges posed by drought in this region.

Suggested Citation

  • Kashish Sadhwani & T. I. Eldho, 2024. "Assessing the Effect of Future Climate Change on Drought Characteristics and Propagation from Meteorological to Hydrological Droughts—A Comparison of Three Indices," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 38(2), pages 441-462, January.
    • Handle: RePEc:spr:waterr:v:38:y:2024:i:2:d:10.1007_s11269-023-03679-7
    DOI: 10.1007/s11269-023-03679-7
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    References listed on IDEAS

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    1. Srimanta Ghosh & K. Srinivasan, 2016. "Analysis of Spatio-temporal Characteristics and Regional Frequency of Droughts in the Southern Peninsula of India," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(11), pages 3879-3898, September.
    2. Gauranshi Raj Singh & Manoj Kumar Jain & Vivek Gupta, 2019. "Spatiotemporal assessment of drought hazard, vulnerability and risk in the Krishna River basin, India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 99(2), pages 611-635, November.
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    4. Dan Li & Bingjun Liu & Changqing Ye, 2022. "Meteorological and hydrological drought risks under changing environment on the Wanquan River Basin, Southern China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 114(3), pages 2941-2967, December.
    5. U. Surendran & B. Anagha & P. Raja & V. Kumar & K. Rajan & M. Jayakumar, 2019. "Analysis of Drought from Humid, Semi-Arid and Arid Regions of India Using DrinC Model with Different Drought Indices," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(4), pages 1521-1540, March.
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