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Monitoring and analysis of drought behavior using remote sensing data in Kermanshah province
Mohammad Hossein Nasserzadeh * 1, Alireza Karbalai Derai2 , Mohammad Siah Kamari3
1- Associate Professor of Climatology, Department of Geography, Faculty of Geographical Sciences, Kharazmi University, Tehran, Iran, Faculty of Geographical Sciences , nasserzadeh2100@yahoo.com
2- Assistant Professor Department of Climatology Faculty of Geographical Sciences, Kharazmi University, Tehran, Iran
3- Master's degree in Climatology, Faculty of Geographical Sciences, Kharazmi University, Tehran, Iran., Faculty of Geographical Sciences
Abstract:   (702 Views)
Drought is one of the natural disasters whose long-term effects affect the economy and society. This phenomenon is considered a challenge in arid and semi-arid regions, including Iran. Nowadays, the use of remote sensing methods can help us in understanding the drought behavior of vegetation. In order to monitor and analyze the behavior of drought in Kermanshah province, the data of Sanjande Weathers products (VIIRS) and AVHRR data indexed by NOAA STAR were used. In this study, the Vegetation Health Index was used in the period of 1982-2021 in a seven-day format with a spatial resolution of 4 x 4 km. After extracting the data in the Kermanshah area, the vegetation drought trend was investigated on 65,387 cells using the Mann-Kendall test. The results showed that in the winter season, the trend of vegetation cover in the western areas of the province was decreasing and significant at the level of 0.05. While in the northern, central and eastern regions of the province, the trend is increasing and significant. In the spring and summer seasons, especially the months of June, July, August and September, which correspond to the dry months of the year, the size of the areas with a significant decreasing trend of vegetation cover has increased, while in the autumn season, with the beginning of the water year, the size of the areas with a decreasing trend has decreased. 
Keywords: VHI change, vegetation health profile, Drought
     
Type of Study: Applicable | Subject: climatology
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Creative Commons License
This work is licensed under a Creative Commons — Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)