Water erosion in the Southern Ural steppes |
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| Authors: | A I Kliment’ev A A Chibilev Yu M Nesterenko I V Lozhkin D G Polyakov |
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| Institution: | 1.Institute of Steppe, Ural Division,Russian Academy of Sciences,Orenburg,Russia;2.State Institution “Orenburg Research Center,”,Orenburg,Russia;3.Orenburg State Pedagogical University,Orenburg,Russia |
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| Abstract: | Ecological-hydrological analysis of erosion processes on the key watersheds of Southern Ural steppe was used to determine
the surface runoff as a function of the physico-geographic and anthropogenic conditions, i.e., snow storage and soil moisture
reserves before winter, whose contribution reaches 68–81%. The rate of humus losses in chernozems and dark chestnut soils
was calculated for different periods in accordance with erosion stress and the extent of the economic development of the territory.
Agroecological types of arable lands with different surface runoff characteristics, rates of natural soil formation, and erosionrelated
soil losses are identified. Measures aimed to reduce humus losses in soils are proposed. Relationships between the rates of
soil formation and erosion losses are proposed to be used as ecological-hydrological criterion (index) of soil stability. |
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