Dissolved organic carbon driven by rainfall events from a semi-arid catchment during concentrated rainfall season in the Loess Plateau, China

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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, Linhua ; Yen, Haw 1; E, Xinhui 2; Chen, Liding 2; Wang, Yafeng 2,3
刊名	HYDROLOGY AND EARTH SYSTEM SCIENCES
	2019-07-25
卷号	23 期号:7 页码:3141-3153
ISSN号	1027-5606
英文摘要	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.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42396]
专题	生态环境研究中心_城市与区域生态国家重点实验室
作者单位	1.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
推荐引用方式 GB/T 7714	Wang, Linhua,Yen, Haw,E, Xinhui,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, Linhua,Yen, Haw,E, Xinhui,Chen, Liding,&Wang, Yafeng.(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, Linhua,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.