Freshwater discharge into the Caribbean Sea from the rivers of Northwestern South America (Colombia): Magnitude, variability and recent changes

Camilo Restrepo, Juan, Carlos Ortiz, Juan, Pierini, Jorge, Schrottke, Kerstin, Maza, Mauro, Otero, Luis and Aguirre, Julian (2014) Freshwater discharge into the Caribbean Sea from the rivers of Northwestern South America (Colombia): Magnitude, variability and recent changes Journal of Hydrology, 509 . pp. 266-281.

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Abstract

The monthly averaged freshwater discharge data from ten rivers in northern Colombia (Caribbean alluvial plain) draining into the Caribbean Sea were analysed to quantify the magnitudes, to estimate long-term trends, and to evaluate the variability of discharge patterns. These rivers deliver similar to 340.9 km(3) yr(-1) of freshwater to the Caribbean Sea. The largest freshwater supply is provided by the Magdalena River, with a mean discharge of 205.1 km(3) yr(-1) at Calamar, which is 26% of the total fluvial discharge into this basin. From 2000 to 2010, the annual streamflow of these rivers increased as high as 65%, and upward trends in statistical significance were found for the Mulatos, Canal del Dique, Magdalena, and Fundacion Rivers. The concurrence of major oscillation processes and the maximum power of the 3-7 year band fluctuation defined a period of intense hydrological activity from approximately 1998-2002. The wavelet spectrum highlighted a change in the variability patterns of fluvial systems between 2000 and 2010 characterised by a shift towards a quasi-decadal process (8-12 years) domain. The Intertropical Convergence Zone (ITCZ), El Nino - Southern Oscillation (ENSO) events, and quasi-decadal climate processes are the main factors controlling the fluvial discharge variability of these fluvial systems. (C) 2013 Elsevier B.V. All rights reserved.

Document Type: Article
Additional Information: Times Cited: 0 0
Research affiliation: Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
ISSN: 0022-1694
Projects: Future Ocean
Date Deposited: 30 Mar 2015 12:03
Last Modified: 30 Mar 2015 12:03
URI: http://eprints.uni-kiel.de/id/eprint/27227

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