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Differential isotopic characteristics of eco-hydrologic processes in a subtropical watershed, China
Hao, Zhuo1,2; Gao, Yang1,2; Sun, Xiaomin1,2; Wen, Xuefa1,2
2018-06-01
Source PublicationECOHYDROLOGY
ISSN1936-0584
Volume11Issue:4Pages:13
Corresponding AuthorGao, Yang(gaoyang@igsnrr.ac.cn)
AbstractIn order to better understand isotopic characteristics of eco-hydrologic processes in subtropical zones, this study selected a typical subtropical watershed in China to investigate and determine the complex differential mechanisms inherent to this water body type. Results showed that stable isotopes in precipitation within a Local Meteoric Water Line in the Xiangxi River basin (where D=(8.23 +/- 0.27)O-18+(17.97 +/- 1.65); R-2=0.94) weighted D and O-18 average precipitation values were -22.11 parts per thousand and -5.23 parts per thousand, respectively. Furthermore, enrichment trends in river water O-18 (-4.21 parts per thousand to -6.91 parts per thousand) and D (-25.11 parts per thousand to -38.13 parts per thousand) and soil solution O-18 (-6.30 parts per thousand to -11.21 parts per thousand) and D (-11.21 parts per thousand to -34.57 parts per thousand) were greater compared with precipitation O-18 (-0.23 parts per thousand to -12.06 parts per thousand) and D (0.54 parts per thousand to -98.52 parts per thousand) and throughfall O-18 (-1.11 parts per thousand to -4.72 parts per thousand) and D (-2.11 parts per thousand to -24.95 parts per thousand). This study found obvious seasonality and higher deuterium excess (d-excess) values in precipitation during the dry season and lower values during the rainy season. Moreover, the orchard was more enriched and the coniferous and broad-leaved mixed forest was more depleted in D and O-18 compared with other land cover types. Precipitation was an important climate variable in subtropical watersheds under the influence of monsoon systems. According to results from the isotopic mixture model, precipitation input fractions were greater than 88% in the soil solution and greater than 21% in river water.
Keywordprecipitation river basin soil solution throughfall O-18 D
DOI10.1002/eco.1944
WOS KeywordSTABLE-ISOTOPES ; RIVER-BASIN ; SOIL-WATER ; MONSOON PRECIPITATION ; NORTHWESTERN CHINA ; SEASONAL DROUGHT ; FLOW PATHS ; SURFACE ; PLANTATION ; MOISTURE
Indexed BySCI
Language英语
Funding ProjectYouth Innovation Promotion Association, CAS ; National Key R&D Program of China[2016YFC0500202] ; National Nature Science Foundation of China[41571130043] ; National Nature Science Foundation of China[31570465]
Funding OrganizationYouth Innovation Promotion Association, CAS ; National Key R&D Program of China ; National Nature Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology ; Water Resources
WOS SubjectEcology ; Environmental Sciences ; Water Resources
WOS IDWOS:000434219200009
PublisherWILEY
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54921
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGao, Yang
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Hao, Zhuo,Gao, Yang,Sun, Xiaomin,et al. Differential isotopic characteristics of eco-hydrologic processes in a subtropical watershed, China[J]. ECOHYDROLOGY,2018,11(4):13.
APA Hao, Zhuo,Gao, Yang,Sun, Xiaomin,&Wen, Xuefa.(2018).Differential isotopic characteristics of eco-hydrologic processes in a subtropical watershed, China.ECOHYDROLOGY,11(4),13.
MLA Hao, Zhuo,et al."Differential isotopic characteristics of eco-hydrologic processes in a subtropical watershed, China".ECOHYDROLOGY 11.4(2018):13.
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