| Karst bare slope soil erosion and soil quality: a simulation case study |
| Dai, Q; Liu, Z; Shao, H; Yang, Z; Dai, Q (reprint author), Guizhou Univ, Coll Forestry, Guiyang 550025, Peoples R China. qhdairiver@163.com; shaohongbochu@126.com
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| 发表期刊 | SOLID EARTH
 |
| ISSN | 1869-9510
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| 2015
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| 卷号 | 6期号:3页码:985-995 |
| DOI | 10.5194/se-6-985-2015
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| 产权排序 | [Dai, Q.; Yang, Z.] Guizhou Univ, Coll Forestry, Guiyang 550025, Peoples R China; [Liu, Z.] Anshun Xixiu Dist Water Conservancy Bur, Anshun 561000, Peoples R China; [Shao, H.] Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Biol & Bioresources Utilizat, Yantai 264003, Peoples R China; [Shao, H.] Jiangsu Acad Agr Sci, Inst Agrobiotechnol, Nanjing 210014, Jiangsu, Peoples R China |
| 作者部门 | 海岸带生物学与生物资源利用所重点实验室
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| 英文摘要 | The influence on soil erosion by different bedrock bareness ratios, different rainfall intensities, different underground pore fissure degrees and rainfall duration are researched through manual simulation of microrelief characteristics of karst bare slopes and underground karst crack construction in combination with artificial simulation of rainfall experiment. The results show that firstly, when the rainfall intensity is small (30 and 50 mm h(-1)), no bottom load loss is produced on the surface, and surface runoff, underground runoff and sediment production are increased with the increasing of rainfall intensity. Secondly, surface runoff and sediment production reduced with increased underground pore fissure degree, while underground runoff and sediment production increased. Thirdly, raindrops hit the surface, forming a crust with rainfall duration. The formation of crusts increases surface runoff erosion and reduces soil infiltration rate. This formation also increases surface-runoff-erosion-damaged crust and increased soil seepage rate. Raindrops continued to hit the surface, leading the formation of crust. Soil permeability showed volatility which was from reduction to increases, reduction, and so on. Surface and subsurface runoff were volatile with rainfall duration. Fourthly, when rock bareness ratio is 50% and rainfall intensities are 30 and 50 mm h(-1), runoff is not produced on the surface, and the slope runoff and sediment production present a fluctuating change with increased rock bareness ratio. Fifthly, the correlation degree between the slope runoff and sediment production and all factors are as follows: rainfall intensity-rainfall duration-underground pore fissure degree-bedrock bareness ratio.; The influence on soil erosion by different bedrock bareness ratios, different rainfall intensities, different underground pore fissure degrees and rainfall duration are researched through manual simulation of microrelief characteristics of karst bare slopes and underground karst crack construction in combination with artificial simulation of rainfall experiment. The results show that firstly, when the rainfall intensity is small (30 and 50 mm h(-1)), no bottom load loss is produced on the surface, and surface runoff, underground runoff and sediment production are increased with the increasing of rainfall intensity. Secondly, surface runoff and sediment production reduced with increased underground pore fissure degree, while underground runoff and sediment production increased. Thirdly, raindrops hit the surface, forming a crust with rainfall duration. The formation of crusts increases surface runoff erosion and reduces soil infiltration rate. This formation also increases surface-runoff-erosion-damaged crust and increased soil seepage rate. Raindrops continued to hit the surface, leading the formation of crust. Soil permeability showed volatility which was from reduction to increases, reduction, and so on. Surface and subsurface runoff were volatile with rainfall duration. Fourthly, when rock bareness ratio is 50% and rainfall intensities are 30 and 50 mm h(-1), runoff is not produced on the surface, and the slope runoff and sediment production present a fluctuating change with increased rock bareness ratio. Fifthly, the correlation degree between the slope runoff and sediment production and all factors are as follows: rainfall intensity-rainfall duration-underground pore fissure degree-bedrock bareness ratio. |
| 文章类型 | Article
|
| 资助机构 | National Natural Science Foundation of China(41461057
; Great Special Foundation of Guizhou Province(2002)
; Projects in the National Science & Technology Pillar Program(2011BAC02B02)
; 41061029)
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| 收录类别 | SCI
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| 语种 | 英语
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| 关键词[WOS] | ENVIRONMENT
; VEGETATION
; COVER
; SPAIN
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| 研究领域[WOS] | Geochemistry & Geophysics
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| WOS记录号 | WOS:000363332700013
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.yic.ac.cn/handle/133337/9472
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| 专题 | 海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室
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| 通讯作者 | Dai, Q (reprint author), Guizhou Univ, Coll Forestry, Guiyang 550025, Peoples R China. qhdairiver@163.com; shaohongbochu@126.com |
推荐引用方式
GB/T 7714 |
Dai, Q,Liu, Z,Shao, H,et al. Karst bare slope soil erosion and soil quality: a simulation case study[J]. SOLID EARTH,2015,6(3):985-995.
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| APA |
Dai, Q,Liu, Z,Shao, H,Yang, Z,Dai, Q ,&shaohongbochu@126.com.(2015).Karst bare slope soil erosion and soil quality: a simulation case study.SOLID EARTH,6(3),985-995.
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| MLA |
Dai, Q,et al."Karst bare slope soil erosion and soil quality: a simulation case study".SOLID EARTH 6.3(2015):985-995.
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