The effect of row grade and length on soil erosion from concentrated flow in furrows of contouring ridge systems

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 > 2016--SCI

	The effect of row grade and length on soil erosion from concentrated flow in furrows of contouring ridge systems
	Q.J. Liu 1,2; J. An 2; G.H. Zhang 1,3; X.Y. Wu 2
刊名	Soil & Tillage Research
	2016-04-07
通讯作者邮箱	Liuqj_79@163.com
期号	160 页码:92-100
关键词	Soil erosion Row grade Row length Contour ridging Concentrated flow
通讯作者	Q.J. Liu
英文摘要	Concentrated flow in furrows may lead to serious rill erosion in production systems where ridges are mulched with plastic film in contouring ridges. Studying the effect of influential factors on soil erosion in such systems could improve our understanding on erosion process and take appropriate control treatments. Considering a furrow with mulched ridges on both sides as a width-limited eroding rill, an in situ field experiment was conducted to analyze the effect of row grades and row lengths on soil erosion. Soil erosion indices, including runoff, runoff modulus, sediment concentration, soil loss, and soil loss modulus were monitored. Row grade and length exerted significant effect on all indices at p < 0.01. The relationship of sediment concentration, soil loss, soil loss modulus and row grade could be fitted by exponential functions (R2 > 0.950, p < 0.01) with the exponents expressed as second-order polynomial functions. From the convex curves of these exponential functions, the critical row grade at which the maximum values occurred were interpreted as 10%. With row grade increasing, erosion presented a detachment-limited process. The relationship between row length and soil erosion indices could be modeled by different exponential functions (R2 > 0.830, p < 0.01): two-parameter exponential function for runoff, modulus of runoff and modulus of soil loss; Box Lucas model for sediment concentration; and second-order polynomial function for soil loss. Based on the results, we suggest that avoiding the row grade of 10% and row length <5 m could reduce soil loss in the contouring ridges where plastic film covers ridges and irrigation is used to supply water into furrows.
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S016719871630023X
语种	英语
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7756]
专题	水土保持研究所_水保所科研产出--SCI_2016--SCI
作者单位	1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China 2.Shandong Provincial Key Laboratory of Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi, Shandong 276000, China 3.School of Geography, Beijing Normal University, Beijing 100875, China
推荐引用方式 GB/T 7714	Q.J. Liu,J. An,G.H. Zhang,et al. The effect of row grade and length on soil erosion from concentrated flow in furrows of contouring ridge systems[J]. Soil & Tillage Research,2016(160):92-100.
APA	Q.J. Liu,J. An,G.H. Zhang,&X.Y. Wu.(2016).The effect of row grade and length on soil erosion from concentrated flow in furrows of contouring ridge systems.Soil & Tillage Research(160),92-100.
MLA	Q.J. Liu,et al."The effect of row grade and length on soil erosion from concentrated flow in furrows of contouring ridge systems".Soil & Tillage Research .160(2016):92-100.