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Modeling of Attrition of Soil Aggregates in Slope Flows

  • DEGRADATION, REHABILITATION, AND CONSERVATION OF SOILS
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Abstract

The erosive capacity of slope water flows, a key parameter in the quantitative assessment of soil erosion, is defined as the difference between the transporting capacity of the flow and the total content of its suspended load and bedload. Therefore, it is necessary to assess the factors and intensity of soil aggregates attrition in the water flow that determine the shares of suspended and dragged particles in the sediment load. The earlier simulation of the attrition of river sediments (H. Sternberg) and soil aggregates (G.I. Shvebs) fail to fully reflect the condition of interaction between soils and slope flows. The further attempts to describe the attrition process using empirical dependences have not given any significant improvements. A fundamentally different model of particle attrition based on the laws of mechanics allows us to describe the attrition of soil aggregates broken away by water flow differentiating the total load between the bedload and suspended load. The experimental verification of the model calculations appears to be satisfactory.

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Funding

The work was conducted according to the Research Plan (State Task) of the Makkaveev Research Laboratory of Soil Erosion and Fluvial Processes.

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Authors and Affiliations

  1. Lomonosov Moscow State University, 119991, Moscow, Russia

    V. M. Gendugov, G. A. Larionov, S. F. Krasnov, L. F. Litvin & A. V. Gorobets

Authors
  1. V. M. Gendugov
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  2. G. A. Larionov
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  3. S. F. Krasnov
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  4. L. F. Litvin
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  5. A. V. Gorobets
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Corresponding author

Correspondence to A. V. Gorobets.

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The authors declare that they have no conflict of interest.

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Translated by G. Chirikova

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Gendugov, V.M., Larionov, G.A., Krasnov, S.F. et al. Modeling of Attrition of Soil Aggregates in Slope Flows. Eurasian Soil Sc. 54, 648–652 (2021). https://doi.org/10.1134/S1064229321040062

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  • DOI: https://doi.org/10.1134/S1064229321040062

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