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Spatiotemporal monitoring of droughts in Iran using remote-sensing indices

Author

Listed:
  • Soheila Pouyan

    (Shiraz University)

  • Mojgan Bordbar

    (Islamic Azad University
    University of Campania “Luigi Vanvitelli”)

  • Venkatesh Ravichandran

    (Bharathidasan University)

  • John P. Tiefenbacher

    (Texas State University)

  • Mehrzad Kherad

    (Agriculture Ministry of Iran)

  • Hamid Reza Pourghasemi

    (Shiraz University)

Abstract

This study spatially monitored drought in Iran using drought indicators. Four drought indicators measured from 2016 to 2020 were used: temperature condition index (TCI), vegetation condition index (VCI), vegetation health index (VHI), and precipitation condition index (PCI). Moreover, a standardized precipitation index (SPI) was prepared using rainfall measurements from 1989 to 2019. The TCI revealed that most of Iran was classified as having “severe drought” in 2020. The highest value of VCI showed for northern Iran, which belongs to the class without drought. The VHI indicated that vegetation stress increased over the study period throughout the region, and areas of severe and moderate drought reached their greatest extents in the aforementioned years. Significant droughts occurred in central, eastern, and southeastern Iran, and mild droughts occurred in northern Iran. The PCI indicated that rainfall amounts have diminished in most of the country over the period of study. The 30-year SPI showed that northern Iran received fine rain and the region has parts that can be classified as either extremely wet or very wet. However, most of the country was extremely dry and severely dry. The analysis of the VHI index for agricultural plants showed that 27.71% of Iran's agricultural regions, including the provinces of Razavi Khorasan, Hamadan, and Khozestan, experienced “critical drought” conditions. The study provides guidance for the selection of the most useful drought-monitoring indicators and can enable a more thorough understanding of drought in arid and semiarid regions.

Suggested Citation

  • Soheila Pouyan & Mojgan Bordbar & Venkatesh Ravichandran & John P. Tiefenbacher & Mehrzad Kherad & Hamid Reza Pourghasemi, 2023. "Spatiotemporal monitoring of droughts in Iran using remote-sensing indices," 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. 117(1), pages 1-24, May.
    • Handle: RePEc:spr:nathaz:v:117:y:2023:i:1:d:10.1007_s11069-023-05847-9
    DOI: 10.1007/s11069-023-05847-9
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