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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, 2016, Vol. 13, No. 4, pp. 113-123

Analysis of NDVI seasonal dynamics of natural vegetation of Low Trans-Volga in Volgograd Region

A.S. Rulev 1 , S.N. Кanishev 2 , S.S. Shinkarenko 1 
1 All-Russia Agroforest Reclamation Institute, Volgograd, Russia
2 Volgograd State University, Volgograd, Russia
Accepted: 24.08.2016
DOI: 10.21046/2070-7401-2016-13-20-113-123
The article presents the results of normalized difference vegetation index (NDVI) of seasonal dynamics of Volgograd Trans-Volga region natural grassland vegetation pasture. Seasonal NDVI value (March − November) is based on multizone satellite images Landsat 8 OLI. Field studies in 2013−2014 enabled to determine an index plot representing special aspects of the vegetation cover of the area, in which characteristic of the established animal husbandry system are studied. There are two NDVI peaks during the growing season: the first peak is during the period of ephemeral and ephemeroid growth (May), the second peak is in the end of summer − beginning of autumn during the growth of halophylic vegetation. The NDVI maximum doesn't correspond to the time of the most accumulated biomass, and its minimum doesn't mean absence of vegetation. At the beginning of the growing season, the vegetation in negative mesoreliefs and negative microreliefs has the biggest NDVI, and at the end of the season it is on the flat regions, in the middle of summer the difference between NDVI value in topographic lows and flat regions is minimal. The correlation analysis has indicated a negative NDVI reaction to temperature and positive reaction to air humidity. As a result of the statistic analysis of vegetation index series, we received the regression equations of seasonal NDVI changes, which revealed the functions of first order derivatives of this equations that characterize the rate of NDVI change during the year. It is indicated that after range fires, the vegetation renews only the next year even with considerable amount of rains during the next months after the fire.
Keywords: natural vegetation, phytocoenoses, pastoral environmental management, NDVI, Landsat OLI, seasonal dynamics, Volgograd Region, semi-desert, Trans-Volga
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