Soil internal forces initiate aggregate breakdown and splash erosion

doi:10.1016/j.geoderma.2018.01.019

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所科研产出--SCI > 2018--SCI

	Soil internal forces initiate aggregate breakdown and splash erosion
	Feinan Hu 1,2; Jingfang Liu 2,3; Chenyang Xu 3; Zilong Wang 2,3; Gang Liu 1,2; Hang Li 4; Shiwei Zhao 1,2; Zhao, SW (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
刊名	GEODERMA
	2018
卷号	320 页码:43-51
关键词	Aggregate Stability Surface Potential Electrostatic Force Slaking Effect Splash Erosion
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2018.01.019
文献子类	Article
英文摘要	Soil erosion is a severe ecological and environmental problem and the main cause of land degradation in many places worldwide. Soil aggregate breakdown is the first key step of splash erosion and is strongly influenced by soil internal forces, including electrostatic, hydration, and van der Waals forces. However, little is known about the influence of soil internal forces on splash erosion. In this study, we demonstrated that both splash erosion rate (SER) and soil aggregate breaking strength (ABS) were significantly affected by soil internal forces. SER and ABS increased first (from 1 to 10(-2) mol L-1) then became stable (from 10(-2) to 10(-4) mol L-1) with decreasing electrolyte concentration in bulk solution. The electrolyte concentration of 10(-2) Mol L-1 in bulk solution was the critical point for both soils in splash erosion and soil aggregate stability. The experimental results can be well interpreted by the theoretical analysis of soil internal forces. The surface potential and electric field around soil particles increased with decreasing electrolyte concentration, thereby increasing the electrostatic repulsive force among soil particles. This phenomenon led to soil aggregate breakdown and release of fine soil particles. Soil splash erosion rate and aggregate stability showed a linear relationship (R-2 = 0.83). Our results suggest that soil internal forces induce soil aggregate breakdown and then release of fine soil particles when the soil was wetted, supplying the original material for splash erosion. Furthermore, the raindrop impact force is the driving mechanism causing soil particle movement. In summary, splash erosion could be due to the coupling effects of soil internal forces and the raindrop impact force. Our study provides a possible internal controlling method for reducing splash erosion by adjusting soil internal forces between soil particles.
学科主题	Agriculture
出版地	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000427999300005
资助机构	National Natural Science Foundation of China [41601236, 41330852] ; National Natural Science Foundation of China [41601236, 41330852] ; CAS "Light of West China" Program [XAB2016B07] ; CAS "Light of West China" Program [XAB2016B07] ; National Science & Technology Supporting Program [2015BCA01B01] ; National Science & Technology Supporting Program [2015BCA01B01] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021402-1613] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021402-1613] ; Northwest AF University [2452016152] ; Northwest AF University [2452016152] ; National Natural Science Foundation of China [41601236, 41330852] ; National Natural Science Foundation of China [41601236, 41330852] ; CAS "Light of West China" Program [XAB2016B07] ; CAS "Light of West China" Program [XAB2016B07] ; National Science & Technology Supporting Program [2015BCA01B01] ; National Science & Technology Supporting Program [2015BCA01B01] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021402-1613] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021402-1613] ; Northwest AF University [2452016152] ; Northwest AF University [2452016152]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/8232]
专题	水保所科研产出--SCI_2018--SCI
通讯作者	Zhao, SW (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Soil & Water Conservat, Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 3.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China 4.Southwest Univ, Chongqing Key Lab Soil Multiscale Interfacial Pro, Coll Resources & Environm, 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 initiate aggregate breakdown and splash erosion[J]. GEODERMA,2018,320:43-51.
APA	Feinan Hu.,Jingfang Liu.,Chenyang Xu.,Zilong Wang.,Gang Liu.,...&Zhao, SW .(2018).Soil internal forces initiate aggregate breakdown and splash erosion.GEODERMA,320,43-51.
MLA	Feinan Hu,et al."Soil internal forces initiate aggregate breakdown and splash erosion".GEODERMA 320(2018):43-51.