Drought monitoring using MODIS satellite images based on NDVI index (Case study: Isfahan province)

Document Type : Original Article

Authors

IHU

Abstract

Drought, as a significant climatic phenomenon, has been extensively studied in Iran, particularly in Isfahan Province. Due to its geographical location and climate change, Iran is highly susceptible to droughts, which have led to numerous economic and social challenges, especially in agriculture and water supply. This study aims to monitor drought in the period between 2000 and 2021 using MODIS satellite data and the NDVI index. Data was extracted from the MOD13Q1 sensor, and changes in vegetation cover in Isfahan Province were analyzed based on this index. Results indicate a significant correlation (0.399) between vegetation cover and spring rainfall, attributed to the province's water resources being dependent on the Zagros Mountains. Furthermore, two severe drought periods were identified: the first in 2000 and 2001, and the second from 2015 to 2018, with the most severe drought occurring in 2018. These findings highlight the substantial impacts of drought on agriculture and water resources, emphasizing the importance of effective management and crisis prevention in vulnerable regions like Isfahan.

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