Modeling of Attrition of Soil Aggregates in Slope Flows

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 intensit...

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Bibliographic Details
Published in:Eurasian soil science 2021-04, Vol.54 (4), p.648-652
Main Authors: Gendugov, V. M., Larionov, G. A., Krasnov, S. F., Litvin, L. F., Gorobets, A. V.
Format: Article
Language:English
Subjects:
Aggregates
Analysis
Attrition
Bed load
Conservation of Soils
Degradation
Earth and Environmental Science
Earth Sciences
Fluvial sediments
Geotechnical Engineering & Applied Earth Sciences
Hydraulic measurements
Mechanics
Rehabilitation
River sediments
Rivers
Sediment load
Sediment transport
Sediments
Slope water
Soil aggregates
Soil conditions
Soil erosion
Soil mechanics
Soil structure
Suspended load
Water flow
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Summary: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.
ISSN:1064-2293
1556-195X
DOI:10.1134/S1064229321040062