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The runoff characteristic under simulated rainfall on purple soil sloping cropland
XU Pei1,2; FU Bin1,2
Corresponding AuthorXU Pei
2011
Source PublicationChinese Journal of Geochemistry
ISSN1993-0364
Volume30Issue:3Pages:317-322
Abstract
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.
KeywordPurple Soil Sloping Cropland Rainfall Simulation Overland Flow Subsurface Flow
Subject Area水土保持
DOI10.1007/s11631-011-0515-5
Indexed ByEI
Language英语
Accession numberAccession number:20113214220153
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17894
Collection山区发展研究中心
Affiliation1.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
Recommended Citation
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.
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