Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered Slopes
[Objective] The dynamic mechanism of soil erosion on vegetation covered slope was studied in order to provide theoretical support for revealing the mechanism of vegetation covered slope erosion in earth rock mountainous areas of North China. [Methods] Based on the runoff dynamic characteristics of s...
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Science Press
2022-04-01
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| Series: | Shuitu baochi tongbao |
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| Online Access: | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220201 |
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| _version_ | 1850058301151117312 |
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| author | Sun Jiamei Hou Peixuan Pang Yubo Zhang Zhenyao Li Hanzhi |
| author_facet | Sun Jiamei Hou Peixuan Pang Yubo Zhang Zhenyao Li Hanzhi |
| author_sort | Sun Jiamei |
| collection | DOAJ |
| description | [Objective] The dynamic mechanism of soil erosion on vegetation covered slope was studied in order to provide theoretical support for revealing the mechanism of vegetation covered slope erosion in earth rock mountainous areas of North China. [Methods] Based on the runoff dynamic characteristics of slope and the method of artificial rainfall simulation, the relationships between runoff hydrodynamic characteristics and erosion processes on vegetation covered slopes (Pinus tabuliformis, Platycladus orientalis, Quercus variabilis and Ziziphus jujuba) were explored quantitively. [Results] The Platycladus orientalis covered slopes had the greatest runoff yield amount with mean value of 56.85 L. The Quercus variabilis covered slopes had the greatest sediment yield amount with mean value of 1 189.15 g. Runoff velocities under all 4 kinds vegetation ranged from 0.803±0.213 to 4.276±0.430 m/min. Reynolds number and Froude number increased with the increase of rainfall intensity, and the values varied 7.127～63.630 and 0.177～0.900, respectively. [Conclusion] Vegetation cover on the slope has a good effect of reducing runoff and sediment. The dynamic factors of runoff on slope are closely related to the sediment yield, which is an important factor to predict the process of soil erosion. |
| format | Article |
| id | doaj-art-c3d7e37bfe9a4501b02493486fb0c678 |
| institution | DOAJ |
| issn | 1000-288X |
| language | zho |
| publishDate | 2022-04-01 |
| publisher | Science Press |
| record_format | Article |
| series | Shuitu baochi tongbao |
| spelling | doaj-art-c3d7e37bfe9a4501b02493486fb0c6782025-08-20T02:51:12ZzhoScience PressShuitu baochi tongbao1000-288X2022-04-014221710.13961/j.cnki.stbctb.2022.02.0011000-288X(2022)02-0001-07Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered SlopesSun Jiamei0Hou Peixuan1Pang Yubo2Zhang Zhenyao3Li Hanzhi4State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, ChinaForestry and Grassland Engineering Project Center of Hebei Province, Shijiazhuang, Hebei 050081, ChinaComprehensive Security Center of Agriculture and Animal Husbandry Bureau of Hailar District, Hulunbuir, Inner Mongolia 021008, ChinaSchool of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, ChinaInstitute of Desertification Studies, Chinease Academy of Forestry, Beijing 100091, China[Objective] The dynamic mechanism of soil erosion on vegetation covered slope was studied in order to provide theoretical support for revealing the mechanism of vegetation covered slope erosion in earth rock mountainous areas of North China. [Methods] Based on the runoff dynamic characteristics of slope and the method of artificial rainfall simulation, the relationships between runoff hydrodynamic characteristics and erosion processes on vegetation covered slopes (Pinus tabuliformis, Platycladus orientalis, Quercus variabilis and Ziziphus jujuba) were explored quantitively. [Results] The Platycladus orientalis covered slopes had the greatest runoff yield amount with mean value of 56.85 L. The Quercus variabilis covered slopes had the greatest sediment yield amount with mean value of 1 189.15 g. Runoff velocities under all 4 kinds vegetation ranged from 0.803±0.213 to 4.276±0.430 m/min. Reynolds number and Froude number increased with the increase of rainfall intensity, and the values varied 7.127～63.630 and 0.177～0.900, respectively. [Conclusion] Vegetation cover on the slope has a good effect of reducing runoff and sediment. The dynamic factors of runoff on slope are closely related to the sediment yield, which is an important factor to predict the process of soil erosion.http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220201vegetationslopesoil erosionhydrodynamic mechanism |
| spellingShingle | Sun Jiamei Hou Peixuan Pang Yubo Zhang Zhenyao Li Hanzhi Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered Slopes Shuitu baochi tongbao vegetation slope soil erosion hydrodynamic mechanism |
| title | Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered Slopes |
| title_full | Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered Slopes |
| title_fullStr | Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered Slopes |
| title_full_unstemmed | Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered Slopes |
| title_short | Hydrodynamic Mechanism of Soil Erosion on Vegetation Covered Slopes |
| title_sort | hydrodynamic mechanism of soil erosion on vegetation covered slopes |
| topic | vegetation slope soil erosion hydrodynamic mechanism |
| url | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220201 |
| work_keys_str_mv | AT sunjiamei hydrodynamicmechanismofsoilerosiononvegetationcoveredslopes AT houpeixuan hydrodynamicmechanismofsoilerosiononvegetationcoveredslopes AT pangyubo hydrodynamicmechanismofsoilerosiononvegetationcoveredslopes AT zhangzhenyao hydrodynamicmechanismofsoilerosiononvegetationcoveredslopes AT lihanzhi hydrodynamicmechanismofsoilerosiononvegetationcoveredslopes |