The runoff characteristic under simulated rainfall on purple soil sloping cropland

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山区发展研究中心

	The runoff characteristic under simulated rainfall on purple soil sloping cropland
	XU Pei1,2 ; FU Bin1,2
刊名	Chinese Journal of Geochemistry
	2011
卷号	30 期号:3 页码:317-322
关键词	purple soil sloping cropland rainfall simulation overland flow subsurface flow
ISSN号	1993-0364
通讯作者	XU Pei
英文摘要	Rainfall runoff is a critical hydrological process related to soil erosion and agricultural non-point pollution. In this study, 25 simulation experiments on rainfall were carried out in five runoff plots. Rape (Brassica campestris) was planted on the downslope of the plots. Experiments were conducted when the vegetation coverage reached 80%. Each plot was subjected to five rainfall events differing in intensity. The results showed: (1) the runoff coefficients of overland flow and subsurface flow were less than 0.6 and 0.005, respectively; (2) the discharge of overland flow was the quadratic function of time; (3) runoff coefficient was the function of slope gradient and rainfall intensity. When the slope gradient increased from 8.7% to 46.6%, the runoff coefficient of overland flow first increased and then decreased. The runoff coefficient reached the maximum when the slope gradient was within the range of 17.6%-36.4%; and (4) the process of subsurface flow generation included the increasing phase and recession phase. Discharge was a logarithm function of time in the increasing phase, and an exponential function in the recession phase. Runoff coefficient of subsurface flow decreased first and then increased when the slope gradient varied from 8.7% to 46.6% and was not correlated with rainfall intensity.
学科主题	水土保持
收录类别	EI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17894]
专题	成都山地灾害与环境研究所_山区发展研究中心
作者单位	1.Key Laboratory of Mountain Surface Process and Hazards, the Chinese Academy of Sciences, Chengdu 2.Institute of Mountain Hazards and Environment, the Chinese Academy of Sciences, Chengdu
推荐引用方式 GB/T 7714	XU Pei,FU Bin. The runoff characteristic under simulated rainfall on purple soil sloping cropland[J]. Chinese Journal of Geochemistry,2011,30(3):317-322.
APA	XU Pei,&FU Bin.(2011).The runoff characteristic under simulated rainfall on purple soil sloping cropland.Chinese Journal of Geochemistry,30(3),317-322.
MLA	XU Pei,et al."The runoff characteristic under simulated rainfall on purple soil sloping cropland".Chinese Journal of Geochemistry 30.3(2011):317-322.