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Influencia del Río Sinú y el Mar Caribe en el sistema lagunar de Cispatá

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Author
Ruiz-Ochoa, M.
Bernal, G.
Polanía, J.
Date
2008

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Alternative Title
Influence of the Sinú River and the Caribbean Sea over the Cispatá lagoon system.
Abstract
La influencia del río Sinú y del mar Caribe en el sistema lagunar de Cispatá se estudió a través del análisis anual, interanual y de tendencia de las series de tiempo hidrológicas (precipitación, caudal) y marinas (TSM, nivel). Las series hidrológicas fueron correlacionadas con los índices macroclimáticos ONI, NAO y PDO y, a partir del registro de las estaciones de caudal ubicadas aguas abajo de la represa Urrá I, se estudiaron sus efectos sobre el sistema lagunar. No se encontró relación significativa entre la precipitación y los eventos ENSO. Los caudales de la parte alta de la cuenca aportan el 50% de la salida. El caudal que llega al sistema lagunar presentó un ciclo unimodal. Anomalías positivas de caudal estuvieron asociadas con La Niña y anomalías negativas con El Niño. Se encontró que el efecto de la regulación de caudales de Urrá I se marca en las estaciones Angostura de Urrá, Pasacaballo y Caño Grande, en tanto que en la estación Cotoca Abajo no es apreciable. El nivel del mar y la TSM registraron un ascenso de 25 cm en 44 años y de 0.6 °C en 20 años, respectivamente. Se plantearon cuatro escenarios prospectivos sobre la influencia río – mar en el sistema lagunar, considerando el ascenso del nivel del mar. En los dos primeros se supone que las comunicaciones entre el río Sinú y el sistema lagunar se mantendrán y en los dos siguientes que uno de los dos brazos que alimentan al sistema se taponará.
The influence of the Sinú River and the Caribbean Sea over the Cispatá lagoon system was studied through annual and interannual analysis, as well as the tendency of hydrological (precipitation, discharge), and marine (SST, level) time series. The hydrological series were correlated with ONI, NAO and PDO macroclimatic indices, and, from data logging of flow stations down of Urrá I dam, their effects over the lagoon system were studied. No significant correlation between the precipitation and ENSO was found. The flow of the river basin highlands contribute with 50% of the one released. The flow coming into the lagoon system displayed a monomodal cycle. Positive flow anomalies were associated with La Niña, negative ones with El Niño. We found that the regulation effect on the flow by Urrá I is noticeable in the Angostura de Urrá, Pasacaballo, and Caño Grande stations, whereas in the Cotoca Abajo station it is not substantial. The sea level and the SST registered a 25 cm rise in 44 years, and one of 0.6 °C in 20 years, respectively. Four prospective scenarios on the river – sea influence over the lagoon system were presented, considering the sea level rise. The first two scenarios suppose that the communications between the Sinú River and the lagoon system will last; and the following two that one of the two arms of the river that feed the system will clog.
Journal
Boletín de investigaciones marinas y costeras
Volume
37
Issue/Article Nr
1
Publisher or University
INVEMAR, Santa Marta (Colombia)
Resource/Dataset Location
http://www.invemar.org.co/siad/descarga.jsp?type=documento&id=835
URI
http://hdl.handle.net/1834/3490
Collections
3. Boletín de Investigaciones Marinas y Costeras

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