Effect of Impact Angle on the Erosion Rate of Coherent Granular Soil, with a Chernozemic Soil as an Example
- Authors: Dobrovol’skaya N.G.1, Kiryukhina Z.P.1, Krasnov S.F.1, Kobylchenko Kuksina L.V.1, Litvin L.F.1, Sudnitsyn I.I.1, Larionov G.A.1, Bushueva O.G.1, Gorobets A.V.1
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Affiliations:
- Lomonosov Moscow State University
- Issue: Vol 51, No 2 (2018)
- Pages: 251-254
- Section: Degradation, Rehabilitation, and Conservation of Soils
- URL: https://journals.rcsi.science/1064-2293/article/view/224437
- DOI: https://doi.org/10.1134/S1064229318020072
- ID: 224437
Cite item
Abstract
It has been shown in experiments in a hydraulic flume with a knee-shaped bend that the rate of soil erosion more than doubles at the flow impact angles to the channel side from 0° to 50°. At higher channel bends, the experiment could not be performed because of backwater. Results of erosion by water stream approaching the sample surface at angles between 2° and 90° are reported. It has been found that the maximum erosion rate is observed at flow impact angles of about 45°, and the minimum rate at 90°. The minimum soil erosion rate is five times lower than the maximum erosion rate. This is due to the difference in the rate of free water penetration into the upper soil layer, and the impact of the hydrodynamic pressure, which is maximum at the impact angle of 90°. The penetration of water into the interaggregate space results in the breaking of bonds between aggregates, which is the main condition for the capture of particles by the flow.
About the authors
N. G. Dobrovol’skaya
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
Z. P. Kiryukhina
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
S. F. Krasnov
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
L. V. Kobylchenko Kuksina
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
L. F. Litvin
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
I. I. Sudnitsyn
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
G. A. Larionov
Lomonosov Moscow State University
Author for correspondence.
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
O. G. Bushueva
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991
A. V. Gorobets
Lomonosov Moscow State University
Email: larionov425@mail.ru
Russian Federation, Moscow, 119991