Freshwater discharge into the Caribbean Sea from the rivers of Northwestern South America (Colombia): Magnitude, variability and recent changes
Freshwater discharge into the Caribbean Sea from the rivers of Northwestern South America (Colombia): Magnitude, variability and recent changes
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DOI：
10.1016/j.jhydrol.2013.11.045
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发表时间：
2014-02-13
影响因子：
6.4
通讯作者：
Aguirre, Julian
中科院分区：
文献类型：
--
作者：
Camilo Restrepo, Juan;Carlos Ortiz, Juan;Aguirre, Julian
对哥伦比亚北部（加勒比冲积平原）流入加勒比海的10条河流的月平均淡水流量数据进行了分析，以量化其量级，估计长期趋势，并评估排放模式的可变性。这些河流每年向加勒比海输送大约340.9公里的淡水。最大的淡水供应由马格达莱纳河提供，在卡拉马尔的平均流量为205.1公里(3)年（-1），占该盆地河流总流量的26%。从2000年到2010年，这些河流的年流量增长高达65%，其中穆拉托斯河、迪克运河河、马格达莱纳河和Fundacion河的年流量呈显著上升趋势。主要振荡过程的同时和3-7年波段波动的最大功率决定了大约1998-2002年期间的强烈水文活动。小波谱显示2000 - 2010年河流系统的变率模式向准年代际过程（8-12年）域转变。热带辐合带（ITCZ）、厄尔尼诺-南方涛动（ENSO）事件和准年代际气候过程是控制河流系统流量变化的主要因素。(C) 2013 Elsevier B.V.版权所有
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.