Investigation of vegetation dynamics with a focus on agricultural land cover and its relation with meteorological parameters based on the remote sensing techniques: a case study of the Gavkhoni watershed
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Department of Geography, Yazd University, Yazd 8915818411, Iran
Institute for Atmospheric Sciences-Weather and Climate and Department of Physics, University of Iceland and Icelandic Meteorological Office (IMO), Bustadavegur 7, IS-108 Reykjavik, Iceland
Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
Final revision date: 2024-02-20
Acceptance date: 2024-03-12
Publication date: 2024-05-06
Corresponding author
Jaromir Radosław Krzyszczak   

Department of Metrology and Modelling of Agrophysical Processes, Instytut Agrofizyki PAN Lublin, Doświadczalna 4, 20-290, Lublin, Poland
Int. Agrophys. 2024, 38(3): 213-229
Data Availability Statement: The data presented in this study are available on request from the first author.
  • A negative trend in VAC was observed for the central region of the Gavkhoni basin
  • A combination of climatic, social, and cultural factors was responsible for VAC reduction
  • A diminishing water storage in the Zayandeh-Roud dam resulting from reduced rainfall was a significant contributing factor to VAC reduction
Background and Aims: This research investigates vegetation dynamics in the Gavkhouni catchment from 2001 to 2021, focusing on the spring season. The aim is to analyse the relationship between aridity, vegetation, and rainfall. Moreover, additional emphasis was placed on exploring the impact of these dynamics on agricultural land cover thereby contributing to our understanding of the environmental dynamics in the Gavkhouni catchment. Methods: The study made use of MODIS data, including the Enhanced Vegetation Index and Vegetation Condition Index, along with monthly rainfall statistics from Chirps. Analytical methods include time series analyses using correlation and regression analysis. Results: Throughout the study period, the average spring vegetation cover was 9276.33 km². The years 2001 and 2018 had the lowest degree of vegetation (15.53, and 17.3% of the watershed area). Conversely, 2013, 2019, and 2020 had the most coverage (27.4, 26.8, and 26.3%). The Enhanced Vegetation Index highlighted the arid years (2001, 2008, 2011, and 2018) and the years with the lowest drought prevalence (2006, 2007, 2010, 2013). Enhanced Vegetation Index correlated with spring rainfall. Cropland cover declined over the study period, and a close correlation was found between winter rainfall and spring agricultural coverage.
This work was supported by Vedurfelagid, Rannis and Rannsoknastofa i vedurfraedi.
The Authors do not declare any conflict of interest.
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