Sigificant dependence from climate and anthropogenic influences characterize ecological systems of Kazakhstan. As result of the geographical location of the republic and ecological situation vegetative degradation sites exist throughout the territory of Kazakhstan. The major process of desertification takes place in the arid and semi-arid areas. To allocate spots of stable degradation of vegetation, the transition zone was first identified. Productivity of vegetation in transfer zone is slightly dependent on climate conditions. Multi-year digital maps of vegetation index were generated with NOAA satellite images. According to the result, the territory of the republic was zoned by means of vegetation productivity criterion. All the arable lands in Kazakhstan are in the risky agriculture zone. Estimation of the productivity of agricultural lands is highly important in the context of risky agriculture, where natural factors, such as wind and water erosion, can significantly change land quality in a relatively short time period. We used an integrated vegetation index to indicate land degradation measures to assess the inter-annual features in the response of vegetation to variations in climate conditions from low-resolution satellite data for all of Kazakhstan. This analysis allowed a better understanding of the spatial and temporal variations of land degradation in the country.
Lev SPIVAK,Irina VITKOVSKAYA,Madina BATYRBAYEVA, et al. The experience of land cover change detection by satellite data[J]. Front Earth Sci,
2012, 6(2): 140-146.
Fig.1 Dynamics of the integral vegetation conditions index for the territory of Kazakhstan (2000-2009)
Fig.2 Configuration of different productivity zones for period 2000-2009
Fig.3 Dynamic of change of squares of zones with different productivities between 2000 and 2009
Fig.4 Location of transit zone on Kazakhstan territory
Fig.5 Localization of sites with low values of the normalized IVI for years of similar and moderate weather conditions.
Fig.6 Dynamics of squares of sites with low values of normalized IVI for years of moderate weather conditions
Fig.7 Masks of the main classes of agricultural lands to assess their productivity obtained from remote sensing data of the Kustanai region: (a) agricultural land; (b) abandoned land.
Fig.8 Definition of sites with different vegetation productivity interpreted from remote sensing data of Kustanai Province: (a) low productivity, cropland; (b) high productivity, abandoned land)
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