Analyzing Agricultural Drought in Mazandaran Province Using Remote Sensing and Meteorological Indicators

Document Type : Original Article

Authors

Student, Department of Watershed Management, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

Abstract

Agricultural drought has become a major concern worldwide due to the severe impact on crops and the indirect impact on occupation as well as per capita income. The use of reflective remote sensing techniques to evaluate the effects of drought is recognized as one of the most efficient methods. Therefore, the purpose of the present study is to analyze agricultural drought in Mazandaran province using Remote sensing and meteorological indicators. At the first, SPI, ZSI and EDI indices were calculated at different time scales and the best index was selected based on the normal distribution method. Then, using Landsat 5, 7 and 8 satellite images, NDVI, EVI and VCI remote sensing indices were extracted and the best index was selected based on the highest correlation with appropriate drought index. Finally, using the best meteorological and remote sensing indices, the agricultural drought in Mazandaran province was evaluated in two very dry (89) and very wet (92) years for different seasons. The results showed that based on the normal distribution method, the sum of the difference from normal distribution for the SPI index is lower than the other indices. The results also showed that the highest correlation was observed between VCI spectral index and SPI meteorological index with time delay of three and six months. The results also showed that the mean VCI in all seasons of very dry year (89) for all stations was below 0.50 and maximum stations had a VCI value of less than 0.35 but in all seasons of very wet year (92) for most stations is above 0.5

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References

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Irrigation and Water Engineering
Volume 13, Issue 1 - Serial Number 49
October 2022
Pages 326-346

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