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DOI	10.5194/hess-23-3141-2019
	Dissolved organic carbon driven by rainfall events from a semi-arid catchment during concentrated rainfall season in the Loess Plateau; China
	Wang L.; Yen H.; Xinhui X.; Chen L.; Wang Y.
发表日期	2019
ISSN	1027-5606
起始页码	3141
结束页码	3153
卷号	23 期号:7
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 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-2, while the event-based DOC flux ranged from 0.18 to 2.84 kg-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 spatiooral scales, which may have implications for the carbon balance and carbon cycle model from an ecologically restored catchment in the LPR. © 2019 Author(s).
语种	英语
scopus关键词	Catchments; Climate change; Climate models; Landforms; Organic carbon; Rain; Sediments; Stream flow; Catchment hydrology; Concentrated rainfalls; Dissolved organic carbon; Headwater catchment; High-frequency monitoring; Hydrological process; Non-linear relationships; Terrestrial doc exports; Runoff; carbon balance; carbon cycle; catchment; climate change; concentration (composition); dissolved organic carbon; hydrology; rainfall; restoration ecology; runoff; China; Guangdong; Shaanxi; Yanan; Yangjiang
来源期刊	Hydrology and Earth System Sciences
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159638
作者单位	Wang, L., State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100085, China; Yen, H., Blackland Research and Extension Center, Texas A and M AgriLife Research, Texas A and M UniversityTX 76502, United States; Xinhui, X., State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100085, China, College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; Chen, L., State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100085, China, College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; Wang, Y., State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100085, China, College of Resources and En...
推荐引用方式 GB/T 7714	Wang L.,Yen H.,Xinhui X.,et al. Dissolved organic carbon driven by rainfall events from a semi-arid catchment during concentrated rainfall season in the Loess Plateau; China[J]. 中国科学院青藏高原研究所,2019,23(7).
APA	Wang L.,Yen H.,Xinhui X.,Chen L.,&Wang Y..(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).
MLA	Wang L.,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).