Destruction of bonds between soil particles in the process of water erosion
It is known that tensile strength of soil samples is by three orders of magnitude greater than the shear stresses on the bottom of slope streams responsible for the detachment and transport of soil particles by water current. C.E. Mirtskhulava believed that detachment of soil particles by water curr...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | Russian |
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V.V. Dokuchaev Soil Science Institute
2015-05-01
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| Series: | Бюллетень Почвенного института им. В.В. Докучаева |
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| Online Access: | https://bulletin.esoil.ru/jour/article/view/3 |
| _version_ | 1797231492685889536 |
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| author | O. G. Bushueva A. V. Gorobets N. G. Dobrovol’Skaya Z. P. Kiryukhina S. F. Krasnov G. A. Larionov L. F. Litvin |
| author_facet | O. G. Bushueva A. V. Gorobets N. G. Dobrovol’Skaya Z. P. Kiryukhina S. F. Krasnov G. A. Larionov L. F. Litvin |
| author_sort | O. G. Bushueva |
| collection | DOAJ |
| description | It is known that tensile strength of soil samples is by three orders of magnitude greater than the shear stresses on the bottom of slope streams responsible for the detachment and transport of soil particles by water current. C.E. Mirtskhulava believed that detachment of soil particles by water current occurs due to the fatigue destruction of bonds between soil particles.Taking this fact into account, tensile strength is lower by two orders of magnitude. M.A. Nearing had an opinion that detachment of soil particles occurs in the points of separation of vortices from the bottom of the stream, where the shear stress is by two orders of magnitude higher than the average. These approaches did not explain overcoming by slope streams of the cohesion forces between soil particles. Studies of the influence of water temperature on the washout rate of model samples have shown that the soil erosion is highly dependent on the water temperature, which is close to the Van’t Hoff’s rule. This means that destruction of bonds between soil particles is probably the result of interaction between the soil solid phase and water molecules. Experiments have also shown that destruction of bonds between soil particles in the sample of chernozem monoaggregate soil occurs under a layer of still water. Upon the start of the water flow, particles that lost bond with the rest of the soil body immediately break away. The number of particles with disrupted bonds grows with the duration of the sample exposure to still water, although with some flattening. Experiments confirm the validity of the hypothesis of non-hydraulic nature of forces that disrupt inter-aggregate bonds during water erosion. |
| first_indexed | 2024-03-08T19:15:48Z |
| format | Article |
| id | doaj.art-b20d820c065948ef8b3b94daaaec3b91 |
| institution | Directory Open Access Journal |
| issn | 0136-1694 2312-4202 |
| language | Russian |
| last_indexed | 2024-04-24T15:45:15Z |
| publishDate | 2015-05-01 |
| publisher | V.V. Dokuchaev Soil Science Institute |
| record_format | Article |
| series | Бюллетень Почвенного института им. В.В. Докучаева |
| spelling | doaj.art-b20d820c065948ef8b3b94daaaec3b912024-04-01T16:06:42ZrusV.V. Dokuchaev Soil Science InstituteБюллетень Почвенного института им. В.В. Докучаева0136-16942312-42022015-05-01078203010.19047/0136-1694-2015-78-20-303Destruction of bonds between soil particles in the process of water erosionO. G. Bushueva0A. V. Gorobets1N. G. Dobrovol’Skaya2Z. P. Kiryukhina3S. F. Krasnov4G. A. Larionov5L. F. Litvin6Lomonosov Moscow State University Faculty of GeographyLomonosov Moscow State University Faculty of GeographyLomonosov Moscow State University Faculty of GeographyLomonosov Moscow State University Faculty of GeographyLomonosov Moscow State University Faculty of GeographyLomonosov Moscow State University Faculty of GeographyLomonosov Moscow State University Faculty of GeographyIt is known that tensile strength of soil samples is by three orders of magnitude greater than the shear stresses on the bottom of slope streams responsible for the detachment and transport of soil particles by water current. C.E. Mirtskhulava believed that detachment of soil particles by water current occurs due to the fatigue destruction of bonds between soil particles.Taking this fact into account, tensile strength is lower by two orders of magnitude. M.A. Nearing had an opinion that detachment of soil particles occurs in the points of separation of vortices from the bottom of the stream, where the shear stress is by two orders of magnitude higher than the average. These approaches did not explain overcoming by slope streams of the cohesion forces between soil particles. Studies of the influence of water temperature on the washout rate of model samples have shown that the soil erosion is highly dependent on the water temperature, which is close to the Van’t Hoff’s rule. This means that destruction of bonds between soil particles is probably the result of interaction between the soil solid phase and water molecules. Experiments have also shown that destruction of bonds between soil particles in the sample of chernozem monoaggregate soil occurs under a layer of still water. Upon the start of the water flow, particles that lost bond with the rest of the soil body immediately break away. The number of particles with disrupted bonds grows with the duration of the sample exposure to still water, although with some flattening. Experiments confirm the validity of the hypothesis of non-hydraulic nature of forces that disrupt inter-aggregate bonds during water erosion.https://bulletin.esoil.ru/jour/article/view/3механизм эрозиимежагрегатные связисопротивление почвы разрывуправило вант-гоффаразрушение межагрегатных связейmechanism of erosioninter-aggregate bondssoil tensile strengthvan’t hoff’s ruledisruption of inter-aggregate bonds |
| spellingShingle | O. G. Bushueva A. V. Gorobets N. G. Dobrovol’Skaya Z. P. Kiryukhina S. F. Krasnov G. A. Larionov L. F. Litvin Destruction of bonds between soil particles in the process of water erosion Бюллетень Почвенного института им. В.В. Докучаева механизм эрозии межагрегатные связи сопротивление почвы разрыву правило вант-гоффа разрушение межагрегатных связей mechanism of erosion inter-aggregate bonds soil tensile strength van’t hoff’s rule disruption of inter-aggregate bonds |
| title | Destruction of bonds between soil particles in the process of water erosion |
| title_full | Destruction of bonds between soil particles in the process of water erosion |
| title_fullStr | Destruction of bonds between soil particles in the process of water erosion |
| title_full_unstemmed | Destruction of bonds between soil particles in the process of water erosion |
| title_short | Destruction of bonds between soil particles in the process of water erosion |
| title_sort | destruction of bonds between soil particles in the process of water erosion |
| topic | механизм эрозии межагрегатные связи сопротивление почвы разрыву правило вант-гоффа разрушение межагрегатных связей mechanism of erosion inter-aggregate bonds soil tensile strength van’t hoff’s rule disruption of inter-aggregate bonds |
| url | https://bulletin.esoil.ru/jour/article/view/3 |
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