A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology
[Objective] The relationship between soil column pore structure and soil erosion resistance for soil columns with Bahiagrass was analyzed in order to provide a scientific basis for the optimal arrangement of plants for soil and water conservation and to assess the benefits of planting Bahiagrass. [M...
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Science Press
2023-10-01
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| Series: | Shuitu baochi tongbao |
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| Online Access: | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20230518 |
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| author | Zhang Ting Shi Mingming Li Xin Wang Xinjun Cao Longxi |
| author_facet | Zhang Ting Shi Mingming Li Xin Wang Xinjun Cao Longxi |
| author_sort | Zhang Ting |
| collection | DOAJ |
| description | [Objective] The relationship between soil column pore structure and soil erosion resistance for soil columns with Bahiagrass was analyzed in order to provide a scientific basis for the optimal arrangement of plants for soil and water conservation and to assess the benefits of planting Bahiagrass. [Methods] This study was conducted using long-term experiments of Bahiagrass grown in soil columns. Four pore indicators (pore length density, bulk density, surface area density, and pore number density) of Bahiagrass soil columns were quantified by CT scanning technology. Flushing tests using a flume with variable slopes were carried out to quantify soil erosion resistance at three slopes (10°, 20°, and 30°) and five runoff rates (0.8, 1.6, 2.4, 3.2, and 4.0 L/s). The relationships between pore structure characteristics and erosion resistance factors were then determined. [Results] Bahiagrass root system development increased during the growth period, but decreased with soil depth. The values of four pore structure indicators in 0—5 cm soil layer were much higher than those in 5—10 cm soil layer, and the average soil rill erodibility (0.026 s/m) and critical shear stress (7.0 Pa) in 0—5 cm surface layer were 0.33 and 1.54 times the values of those respective parameters in 5—10 cm lower soil layer. [Conclusion] The pore characteristics of plant root development indicated soil erosion resistance. The four pore structure indicators obtained by CT scanning were significantly related to factors such as rill erodibility. The pore surface area density was most closely related to the erosion resistance factors. |
| format | Article |
| id | doaj-art-43b51bce8a5e4fda93fc539ae52cd4a5 |
| institution | Kabale University |
| issn | 1000-288X |
| language | zho |
| publishDate | 2023-10-01 |
| publisher | Science Press |
| record_format | Article |
| series | Shuitu baochi tongbao |
| spelling | doaj-art-43b51bce8a5e4fda93fc539ae52cd4a52024-11-13T04:30:43ZzhoScience PressShuitu baochi tongbao1000-288X2023-10-0143514815510.13961/j.cnki.stbctb.2023.05.0181000-288X(2023)05-0148-08A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning TechnologyZhang Ting0Shi Mingming1Li Xin2Wang Xinjun3Cao Longxi4College of Ecology and Environment, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaChina Academy of Transportation Sciences, Beijing 100029, ChinaCollege of Ecology and Environment, Chengdu University of Technology, Chengdu, Sichuan 610059, China[Objective] The relationship between soil column pore structure and soil erosion resistance for soil columns with Bahiagrass was analyzed in order to provide a scientific basis for the optimal arrangement of plants for soil and water conservation and to assess the benefits of planting Bahiagrass. [Methods] This study was conducted using long-term experiments of Bahiagrass grown in soil columns. Four pore indicators (pore length density, bulk density, surface area density, and pore number density) of Bahiagrass soil columns were quantified by CT scanning technology. Flushing tests using a flume with variable slopes were carried out to quantify soil erosion resistance at three slopes (10°, 20°, and 30°) and five runoff rates (0.8, 1.6, 2.4, 3.2, and 4.0 L/s). The relationships between pore structure characteristics and erosion resistance factors were then determined. [Results] Bahiagrass root system development increased during the growth period, but decreased with soil depth. The values of four pore structure indicators in 0—5 cm soil layer were much higher than those in 5—10 cm soil layer, and the average soil rill erodibility (0.026 s/m) and critical shear stress (7.0 Pa) in 0—5 cm surface layer were 0.33 and 1.54 times the values of those respective parameters in 5—10 cm lower soil layer. [Conclusion] The pore characteristics of plant root development indicated soil erosion resistance. The four pore structure indicators obtained by CT scanning were significantly related to factors such as rill erodibility. The pore surface area density was most closely related to the erosion resistance factors.http://stbctb.alljournal.com.cn/stbctben/article/abstract/20230518bahiagrassct scanningpore structuresoil detachment raterill erodibility |
| spellingShingle | Zhang Ting Shi Mingming Li Xin Wang Xinjun Cao Longxi A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology Shuitu baochi tongbao bahiagrass ct scanning pore structure soil detachment rate rill erodibility |
| title | A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology |
| title_full | A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology |
| title_fullStr | A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology |
| title_full_unstemmed | A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology |
| title_short | A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology |
| title_sort | study on pore structure and erosion resistance of soil column based on ct scanning technology |
| topic | bahiagrass ct scanning pore structure soil detachment rate rill erodibility |
| url | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20230518 |
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