Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 1, pp. 138-146
Assessment of steppe burning dynamics in Astrakhan Region
1 Federal Scientific Center of Agroecology, Complex Meliorations and Agroforestry RAS, Volgograd, Russia
Accepted: 11.10.2017
DOI: 10.21046/2070-7401-2018-15-1-138-146
The article presents the results of geoinformation mapping of fires in the zonal landscapes of the Astrakhan Region. Research was based in RGB-composites Landsat-5, -7, -8 for the period from 1997 to 2016, as well as products MCD45A1 and MOD14A1 (2001–2016), containing data on burned areas and active fires. The MODIS data and automated monitoring systems do not fully display the areas of burned territories, therefore they were used only for verification in the case of visual interpretation. Near 60 % of the active fires are on the summer months. For twenty years, the area of steppe fires was 42 % of the entire study area, with 48 % of the area burned only once, 25.4 % twice, and 26.6 % three or more times. Steppe fires are located in the north-eastern part of the region, because of the features of the soil-vegetation cover. Sod cereals on loamy light-chestnut soils are quickly restored after fires, and the abundance of ephemeral plants also contributes to the accumulation of mortmass. In the right-bank part of the region fires are rare. This is facilitated by pasture impact, which reduces the total amount of phytomass and reduces the plants projective cover. Vector layers of fires make it possible to determine territories with different duration of pyrogenic successions, which will allow field studies of the regularities of restoration of vegetation after fires.
Keywords: natural vegetation, landscape fires, Landsat, MODIS, Astrakhan Region, remote sensing
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