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(Article of periodic en Anglais - 2012)

Document title

Diagnosis of river basins as CO2 sources or sinks subject to sediment movement

Authors(s) and Affiliation(s)

YUE Y. (1 2) ; NI J. (1 2) ; BORTHWICK A.G.L. (3) ; MIAO C. (4) ;
(1) The Key Lab. of Water and Sediment Sciences, Ministry of Education, Beijing, CHINE
(2) Dep. of Environmental Engineering, Univ., Peking, CHINE
(3) Dep. of Civil and Environmental Engineering, Univ. College, Cork, IRLANDE
(4) State Key Lab. of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Normal Univ., Beijing, CHINE

Abstract

This paper introduces a rule-of-thumb coordinate system based on sediment delivery ratio (SDR) and soil humin content (SHC) in order to evaluate the net effect of soil erosion, sediment transport and deposition on CO2 flux in river basins. The SDR-SHC system delineates CO2 source and sink areas, and further divides the sink into strong and weaks areas according to the world-average line. The Yellow River Basin, most severely suffering soil erosion in the world, only appears to be a weak erosion-induced CO2 sink in this system. the temporal analysis shows that the Yellow River Basin was once a source, but changed its role to become a weak sink in the past 40 years due to both anthropogenic and climatic influences. The spatial analysis identifies the middle sub-basin as the main source region, and the lower as the main sink. For comparison, sediment-movement-related CO2 fluxes of 8 other major basins in 4 continents are examined

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no13 [pp. 1398-1406]

Bibliographic references : 1 p.

Collation : 5 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3254

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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