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Dissolved organic carbon driven by rainfall events from a semi-arid catchment during concentrated rainfall season in the Loess Plateau, China
Wang, LH (Wang, Linhua)1; Yen, H (Yen, Haw)2; E, XH (E, Xinhui)1,3; Chen, LD (Chen, Liding)1,3; Wang, YF (Wang, Yafeng)1,3,4
Source PublicationHYDROLOGY AND EARTH SYSTEM SCIENCES
2019
Volume23Issue:7Pages:3141-3153
DOI10.5194/hess-23-3141-2019
Abstract

Dissolved organic carbon (DOC) transported by runoff has been identified as an important role in the global carbon cycle. Despite there being many studies on DOC concentration and flux, little information is available for the semi-arid catchments of the Loess Plateau region (LPR). The primary goal of this study was to quantify DOC exported and driven by a sequence of rainfall events during the concentrated rainfall season. In addition, factors that affect DOC export from a small headwater catchment will be investigated accordingly. Runoff discharge and DOC concentration were monitored at the outlet of the Yangjuangou catchment in Yanan, Shaanxi Province, China. The results showed that DOC concentration was highly variable, with event-based DOC concentrations ranging from 5.14 to 13.14 mg L-1. Hysteresis analysis showed a nonlinear relationship between DOC concentration and flow rate in the hydrological process. The monthly DOC flux loading from the catchment was varied from 94.73 to 110.17 kg km(-2), while the event-based DOC flux ranged from 0.18 to 2.84 kg km(-2) in the period of June to September. Variations of event-driven DOC concentration contributed slightly to a difference in DOC flux, whereas intra-events of rainfall amount and runoff discharge led to evident differences in DOC export. In conclusion, our case results highlighted the advantages of high-frequency monitoring for DOC export and indicated that event-driven DOC export is largely influenced by the interaction of catchment hydrology and antecedent condition within a catchment. Engineers and scientists can take advantage of the derived results to better develop advanced field monitoring work. In addition, more studies are needed to investigate the magnitude of terrestrial DOC export in response to projected climate change at larger spatio-temporal scales, which may have implications for the carbon balance and carbon cycle model from an ecologically restored catchment in the LPR.

Subject AreaGeosciences
WOS IDWOS:000477081400001
Language英语
Indexed BySCI
KeywordStorm Events Climate-change Hilly Area Soil-water Export Runoff Headwater Responses Nutrient Nitrogen
WOS Research AreaGeology ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Water Resources
Cooperation Status国际
ISSN1027-5606
Department高寒生态重点实验室
URL查看原文
PublisherCOPERNICUS GESELLSCHAFT MBH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9229
Collection图书馆
Corresponding AuthorWang, YF (Wang, Yafeng)
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China;
2.Texas A&M Univ, Blackland Res & Extens Ctr, Texas A&M AgriLife Res, Temple, TX 76502 USA;
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China;
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
Recommended Citation
GB/T 7714
Wang, LH ,Yen, H ,E, XH ,et al. Dissolved organic carbon driven by rainfall events from a semi-arid catchment during concentrated rainfall season in the Loess Plateau, China[J]. HYDROLOGY AND EARTH SYSTEM SCIENCES,2019,23(7):3141-3153.
APA Wang, LH ,Yen, H ,E, XH ,Chen, LD ,&Wang, YF .(2019).Dissolved organic carbon driven by rainfall events from a semi-arid catchment during concentrated rainfall season in the Loess Plateau, China.HYDROLOGY AND EARTH SYSTEM SCIENCES,23(7),3141-3153.
MLA Wang, LH ,et al."Dissolved organic carbon driven by rainfall events from a semi-arid catchment during concentrated rainfall season in the Loess Plateau, China".HYDROLOGY AND EARTH SYSTEM SCIENCES 23.7(2019):3141-3153.
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