Baum, Antje, Rixen, Tim and Samiaji, Joko (2007) Relevance of peat draining rivers in central Sumatra for the riverine input of dissolved organic carbon into the ocean. Estuarine, Coastal and Shelf Science, 73 (3-4). pp. 563-570. DOI

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Sources and discharges of dissolved organic carbon (DOC) from the central Sumatran river Siak were studied. DOC concentrations in the Siak ranged between 560 and 2594 μmol l−1 and peak out after its confluence with the river Mandau. The Mandau drains part of the central Sumatran peatlands and can be characterized as a typical blackwater river due to its high DOC concentration, its dark brown-coloured, acidic water (pH 4.4–4.7) and its low concentration of total suspended matter (12–41 mg l−1). The Mandau supplies about half of the DOC that enters the Siak Estuary where it mixes conservatively with ocean water. The DOC input from the Siak into the ocean was estimated to be ∼0.3 Tg C yr−1. Extrapolated to entire Indonesia the data suggest a total Indonesian DOC export of ∼21 Tg yr−1 representing ∼10% of the global riverine DOC input into the ocean.

Document Type: Article
Programme Area: UNSPECIFIED
Research affiliation: Biogeochemistry and Geology > Carbon and Nutrient Cycling
Refereed: Yes
Open Access Journal?: No
ISSN: 02727714
Date Deposited: 28 Feb 2020 10:47
Last Modified: 01 Oct 2020 13:00

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