IMHE OpenIR  > 山地表生过程与生态调控重点实验室
A field study of colloid transport in surface and subsurface flows
Zhang, Wei1,2; Tang, Xiang-Yu1; Xian, Qing-Song1; Weisbrod, Noam3; Yang, Jae E.4; Wang, Hong-Lan1
Corresponding AuthorXiang-Yu Tang
2016
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
EISSN1879-2707
Volume542Pages:101-114
SubtypeArticle
AbstractColloids have been recognized to enhance the migration of strongly-sorbing contaminants. However, few field investigations have examined combined colloid transport via surface runoff and subsurface flows. In a headwater catchment of the upper Yangtze River, a 6 m (L) by 4 m (W) sloping (6 degrees) farmland plot was built by cement walls to form no-flow side boundaries. The plot was monitored in the summer of 2014 for the release and transport of natural colloids via surface runoff and subsurface flows (i.e., the interflow from the soil-mudrock interface and fracture flow from the mudrock-sandstone interface) in response to rain events. The water sources of the subsurface flows were apportioned to individual rain events using a two end-member model (i.e., mobile pre-event soil water extracted by a suction-cup sampler vs. rainwater (event water)) based on delta O-18 measurements. For rain events with high preceding soil moisture, mobile pre-event soil water was the main contributor (generally >60%) to the fracture flow. The colloid concentration in the surface runoff was 1-2 orders of magnitude higher than that in the subsurface flows. The lowest colloid concentration was found in the subsurface interflow, which was probably the result of pore-scale colloid straining mechanisms. The rainfall intensity and its temporal variation govern the dynamics of the colloid concentrations in both surface runoff and subsurface flows. The duration of the antecedent dry period affected not only the relative contributions of the rainwater and the mobile pre-event soil water to the subsurface flows but also the peak colloid concentration, particularly in the fracture flow. The <10 mu m fine colloid size fraction accounted for more than 80% of the total suspended particles in the surface runoff, while the colloid size distributions of both the interflow and the fracture flow shifted towards larger diameters. These results highlight the need to avoid the application of strongly-sorbing agrochemicals (e.g., pesticides, phosphorus fertilizers) immediately before rainfall following a long no-rain period because their transport in association with colloids may occur rapidly over long distances via both surface runoff and subsurface flows with rainfall. (C) 2016 Elsevier B.V. All rights reserved.
KeywordColloid Release Colloid Transport Particle Size Distribution Flow Generation Hydrograph Separation
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.jhydrol.2016.08.056
WOS Subject ExtendedEngineering ; Geology ; Water Resources
Indexed BySCI
WOS KeywordUNSATURATED POROUS-MEDIA ; FRACTURED SHALE SAPROLITE ; GORGES RESERVOIR AREA ; AIR-WATER-INTERFACE ; IONIC-STRENGTH ; PARTICLE MOBILIZATION ; HILLSLOPE CROPLAND ; MACROPOROUS SOILS ; SIZE DISTRIBUTION ; PHOSPHORUS LOSS
Language英语
Quartile2区
TOP
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000388248400007
Funding OrganizationNational Basic Research Program of the Ministry of Science and Technology of China(2012CB417101) ; GAIA Surface Soil Resource Inventory and Integration (SSORii) Program of the Korea Ministry of Environment ; National Natural Science Foundation of China(41171372 ; CAS Visiting Professorship for Senior International Scientists(2011T1Z27) ; 41471268)
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18067
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
2.Chongqing Technol & Business Univ, Sch Tourism & Land Resource, Chongqing 400067, Peoples R China
3.Ben Gurion Univ Negev, Dept Environm Hydrol & Microbiol, Zuckerberg Inst Water Res, J Blaustein Inst Desert Res, POB 192, IL-84990 Midreshet Ben Gurion, Israel
4.Kangwon Natl Univ, Dept Environm Biol, Chunchon 200701, South Korea
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zhang, Wei,Tang, Xiang-Yu,Xian, Qing-Song,et al. A field study of colloid transport in surface and subsurface flows[J]. JOURNAL OF HYDROLOGY,2016,542:101-114.
APA Zhang, Wei,Tang, Xiang-Yu,Xian, Qing-Song,Weisbrod, Noam,Yang, Jae E.,&Wang, Hong-Lan.(2016).A field study of colloid transport in surface and subsurface flows.JOURNAL OF HYDROLOGY,542,101-114.
MLA Zhang, Wei,et al."A field study of colloid transport in surface and subsurface flows".JOURNAL OF HYDROLOGY 542(2016):101-114.
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