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(Article of periodic en Anglais - 2014)

Document title

Sources and transport of organic carbon from the Dongjiang River to the Humen outlet of the Pearl River, southern China

Authors(s) and Affiliation(s)

FU Y. (1) ; TANG C. (2) ; LI J. (3) ; ZHAO Y. (1) ; ZHONG W. (1) ; ZENG X. (1) ;
(1) School of Geography, South China Normal Univ., Guangzhou, CHINE
(2) State Key Lab. of Environmental Geochemistry, Inst. of Geochemistry, Chinese Academy of Sciences, Guiyang, CHINE
(3) Tianjin Key Lab. of Water Resources and Environment, Normal Univ., Tianjin, CHINE

Abstract

This paper presents bulk total organic carbon (TOC) from the Dongjiang catchment to the adjacent Humen outlet, and discusses the applicability of δ13C and ratio of carbon to nitrogen (C/N) as indicators for sources of organic matter in the surface sediments. Survey results showed that organic carbon concentration in summer were higher than in the winter. An elevated trend of TOC occurred along the river to the Humen outlet in both surveys, and the highest mean values of dissolved and particular organic carbon (DOC)and (POC) were observed in the urban deltaic region in summer flood flow. Results suggest that POC in the 3 zones of upstream-delta-outlet dominantly came from riverbank soil, phytoplankton and agricultural C3 plants in winter, whereas main sources were from the riverbank and mangrove soil in summer. Moreover, anthropogenic sewage inputs had 11% and 7% contribution to POC in the deltaic and outlet

Source

Article of periodic

published at : Journal of geographical sciences. Acta geographica sinica / ISSN 1009-637X

Editor : CHINE

Millesime : 2014, vol. 24, no1 [pp. 143-158]

Bibliographic references : 62 ref.

Collation : 5 fig., 1 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1007/s11442-014-1078-2

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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