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20130720 新增 20 条
1.
Accession number: 20132816485585
Title: Modeling soil solute release into runoff and transport with runoff on a loess slope
Authors: Dong, Wencai1, 2 ; Wang, Quanjiu3, 4/;王全九
Author affiliation:
1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of
Soil and Water Conservation, Chinese Academy of Sciences, Yangling, Shaanxi 712100, China
2 Univ. of Chinese Academy of Sciences, Beijing 100049, China
3 Institute of Water Resources, Xi'an Univ. of Technology, Xi'an, Shannxi 710048, China
4 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of
Soil and Water Conservation, Chinese Academy of Sciences, No. 26 Xinong Rd., Yangling, Shaanxi
712100, China
Corresponding author: Wang, Q. ([e-mail])
Source title: Journal of Hydrologic Engineering
Abbreviated source title: J. Hydrol. Eng.
Volume: 18
Issue: 5
Issue date: 2013
Publication year: 2013
Pages: 527-535
Language: English
ISSN: 10840699
Document type: Journal article (JA)
Publisher: American Society of Civil Engineers (ASCE), 1801 Alexander Graham Bell Drive,
Reston, VA 20191-4400, United States
Abstract: Rainfall results in the transfer of chemicals from soil to surface runoff. A
physically-based solute transport model was developed for estimating the solute concentration in
runoff originating from the soil surface. The model accounts for the effects of soil infiltration,
raindrops, the water runoff rate, and the return flow, all of which influence the concentration of
the solutes in the runoff. It was assumed that the depth of mixing zone changed with the
varieties of the raindrop hits, return flow, and overland flow. It was also assumed that runoff and
soil in the mixing zone mixed instantaneously and that the solute in the soil beneath the mixing
zone was moved to the mixing zone by diffusion. The mixing zone was included in the model and
was based on the deposited layer or shield concept. To test the model, laboratory experiments
were carried out that used two soil types that were exposed to simulated rainfall. The results
simulated by the model were highly correlated with the experimental data. In the first few
minutes after rainfall began, the solute concentration in the runoff was mainly controlled by the
rainfall rate and solute concentration in the mixing zone; higher solute levels in the mixing zone