Impact of aridization on soil cover transformation of the Aral Sea and the modern Syr-Darya Delta

摘要: The effects of human activities on the soil cover transformation in eastern part Kazakhstan were investigated during period 1956−2008. results research for different types Priaralye indicated that there was 643.3×10 3 hm 2 solonchaks, accounting 38.5 % total ) and grey-brown desert soils solonetzes (146.7×10 ). In 2001 area solonchak 755×10 decreased to 2008, which due shrinkage Aral Sea, areas marsh lakeshore solonchaks with increase dried bottom Sea. level modern delta Syr-Darya River can be seen from comparison obtained years study area. solon- chaks increased by 10×10 alluvial-meadow salinizied 17.9×10 1956-1969. It means many non-salinizied transformed into ones. Striking changes occurred structure as a result aridization. So, researches in1969 significantly determined hydromorphic subjected desertification (it not fixed map before 1956). Later, these takyr-like soils. almost times 34 (from 1956 1990). long-term have shown tendencies negative processes (salinization deflation) are being kept lead further eco-environment degradation region.