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Concentration and spectroscopic characteristics of DOM in surface runoff and fracture flow in a cropland plot of a loamy soil
Xian, Qingsong1,2; Li, Penghui3; Liu, Chen1; Cui, Junfang1; Guan, Zhuo1; Tang, Xiangyu1
2018
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
Volume622Pages:385-393
SubtypeArticle
AbstractBeing crucial for predicting the impact of source inputs on a watershed in rainfall events, an understanding of the dynamics and characteristics of dissolved organic matter (DOM) export from the soil under particular land use types, particularly those associated with underground flows is still largely lacking. A field study was carried out using a 1500 m(2) slope farmland plot in the hilly area of Sichuan Basin, Southwest China. The discharge of surface runoff and fracture flow was recorded and samples were collected in four representative rainfall events. For DOM characterization, concentration of dissolved organic carbon (DOC) and absorbance/excitation-emission matrix (EEM) fluorescence were analyzed. Soil water potential was also determined using tensiometers for understanding the runoff generation mechanisms. The DOC values for both surface and fracture flow showed significant responses to rainfall, with hydrological path being the primary factor in determining DOM dynamics. EEM-PARAFAC analyses indicated that the soil DOM mainly consisted of two terrestrial humic-like components with peaks located at Ex/Em 270(380)/480 nm (C1) and 250(320)/410 nm (C2), respectively. Concentrations of these components also responded strongly to rainfall, fluctuating in good agreement with the corresponding DOCs. Although there was no change in the presence of the components themselves, their relative distributions varied during precipitation, with the C1/C2 ratio increasing with the proportion of soil pre-event water. As the dynamic changes of soil DOM characteristics can be successfully captured using spectroscopic techniques, they may serve as a tracer for understanding hydrological paths based on their potential correlations with water source differences during rains. (c) 2017 Elsevier B.V. All rights reserved.
KeywordSoil Dissolved organic matter Hydrological process EEM fluorescence PARAFAC analysis
DOI10.1016/j.scitotenv.2017.12.010
Indexed BySCI
WOS KeywordDISSOLVED ORGANIC-MATTER ; FLUORESCENCE SPECTROSCOPY ; LAND-USE ; COLLOID TRANSPORT ; SLOPING FARMLAND ; STREAMS ; CHINA ; RIVER ; CATCHMENT ; PARAFAC
Language英语
Quartile2区
Funding ProjectNational Key Research and Development Program of China[2017YFD0800101] ; National Key Research and Development Program of China[2016YFD0800203] ; National Natural Science Foundation of China[41471268] ; National Natural Science Foundation of China[41771521] ; Institute of Mountain Hazards and Environment, CAS[SDS-135-1702]
TOP
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000426349000040
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; Institute of Mountain Hazards and Environment, CAS
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/22513
Collection山区发展研究中心
山地表生过程与生态调控重点实验室
Corresponding AuthorLiu, Chen
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding 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
Xian, Qingsong,Li, Penghui,Liu, Chen,et al. Concentration and spectroscopic characteristics of DOM in surface runoff and fracture flow in a cropland plot of a loamy soil[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,622:385-393.
APA Xian, Qingsong,Li, Penghui,Liu, Chen,Cui, Junfang,Guan, Zhuo,&Tang, Xiangyu.(2018).Concentration and spectroscopic characteristics of DOM in surface runoff and fracture flow in a cropland plot of a loamy soil.SCIENCE OF THE TOTAL ENVIRONMENT,622,385-393.
MLA Xian, Qingsong,et al."Concentration and spectroscopic characteristics of DOM in surface runoff and fracture flow in a cropland plot of a loamy soil".SCIENCE OF THE TOTAL ENVIRONMENT 622(2018):385-393.
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