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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2015, Vol. 12, No. 6, pp. 48-58

Analysis of vegetation index long-term dynamics for crop areas

E.A. Terekhin 1 
1 Belgorod State National Research University, Belgorod, Russia
The dynamics of vegetation index NDVI for crop areas of the Belgorod Region in 2000-2014 has been investigated. Analysis of index values for 342 time slices at intervals of 16 days was performed. The results based on NDVI values computed at more than 20,000 cultivated areas of the region on the basis of the MOD13Q1 images were obtained. The index seasonal dynamics features typical of the crop areas in the region were analyzed. It was found that NDVI average annual seasonal curves for all parts of the region have approximately the same shape. Territorial differences in the average and maximum vegetation index values were identified. In the western part of the Belgorod Region, the crop areas are characterized by higher NDVI average annual values than those in the eastern part. It was found that the index seasonal dynamics is characterized by a period of continuous growth since the beginning of February to the first half of June and a period of decrease for the rest of the year. From September to November, a slowdown in the fall of index values takes place. It is due to vegetation growth in winter crop areas. A downward trend in the index annual average was revealed for 2000 to 2010. The dependence of NDVI annual average on the influence of natural and anthropogenic factors on vegetation cover was found for certain years.
Keywords: NDVI, MODIS, time series, long-term dynamics, vegetation cover, crop areas
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