KMS Institute of soil and water conservation Chinese Academy of Sciences
| Soil internal forces contribute more than raindrop impact force to rainfall splash erosion | |
| Feinan Hu1,2; Jingfang Liu1,3; Chenyang Xu3; Wei Du3; Zhihua Yang2; Xinmin Liu4; Gang Liu1,2; Shiwei Zhao1,2; Liu, G (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China. | |
| 文章类型 | Article |
| 2018 | |
| 发表期刊 | GEODERMA
 |
| ISSN | 0016-7061 |
| 通讯作者邮箱 | gliu@foxmail.com |
| 卷号 | 330页码:91-98 |
| 摘要 | Soil internal forces, including electrostatic, hydration and van der Waals, play critical roles in aggregate stability, erosion, and other processes related to soil and water. However, the extent to which soil internal forces influence splash erosion during rainfall remains unclear. In the present study, we used cationic-saturated soil samples to quantitatively separate the effects of soil internal and raindrop impact forces (external) on splash erosion through simulated rainfall experiments. An electrolyte solution was employed as rainfall material to represent the combined effects of soil internal and external forces on splash erosion. Ethanol was used to simulate the sole effect of soil external force on splash erosion. The soil splash erosion rate increased with increasing rainfall kinetic energy in experiments with electrolyte solution and ethanol and was also greatly influenced by soil internal forces. Moreover, the soil splash erosion rate increased first (from 1 to 10(-2) mol L-1) then leveled off (from 10(-2) to 10(-4) molL(-1)) with decreasing electrolyte concentration in the bulk solution. This finding was in agreement with the theoretical analysis of soil internal forces. The contribution rate of soil internal forces on splash erosion was > 65% at a low electrolyte concentration (< 10(-2)mol L-1) and only 3%-25% at an electrolyte concentration of 1 mol L-1. Even though the electrolyte concentration of the soil bulk solution reached 10(-1) mol L-1, the contribution rate of soil internal forces to splash erosion was > 50%. Hence, soil internal forces exerted higher contribution to rainfall splash erosion than raindrop impact force under most field conditions. This work provides new understanding of the mechanism of soil splash erosion and establishes the possibility of controlling splash erosion by jointly regulating the soil internal and external forces. |
| 关键词 | Electrostatic Force Hydration Force Raindrop Impact Force Rainfall Kinetic Energy |
| 学科领域 | Agriculture |
| DOI | 10.1016/j.geoderma.2018.05.031 |
| 收录类别 | SCI |
| 出版地 | PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS |
| 语种 | 英语 |
| WOS记录号 | WOS:000438324600009 |
| 出版者 | ELSEVIER SCIENCE BV |
| 项目资助者 | National Natural Science Foundation of China [41601236, 41701261, 41761144060] ; National Natural Science Foundation of China [41601236, 41701261, 41761144060] ; National Key R&D Program of China [2016YFE0202900] ; National Key R&D Program of China [2016YFE0202900] ; CAS "Light of West China" Program [XAB2016B07] ; CAS "Light of West China" Program [XAB2016B07] ; Doctoral Start Up Research Fund of Northwest AF University [2452016152] ; Doctoral Start Up Research Fund of Northwest AF University [2452016152] |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | sbir.nwafu.edu.cn/handle/361005/8173 |
| 专题 | 水保所科研产出--SCI_2018--SCI |
| 通讯作者 | Liu, G (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China. |
| 作者单位 | 1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China 4.Southwest Univ, Coll Resources & Environm, Chongqing Key Lab Soil Multiscale Interfacial Pro, Chongqing 400715, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feinan Hu,Jingfang Liu,Chenyang Xu,et al. Soil internal forces contribute more than raindrop impact force to rainfall splash erosion[J]. GEODERMA,2018,330:91-98. |
| APA | Feinan Hu.,Jingfang Liu.,Chenyang Xu.,Wei Du.,Zhihua Yang.,...&Liu, G .(2018).Soil internal forces contribute more than raindrop impact force to rainfall splash erosion.GEODERMA,330,91-98. |
| MLA | Feinan Hu,et al."Soil internal forces contribute more than raindrop impact force to rainfall splash erosion".GEODERMA 330(2018):91-98. |
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