Patrones de la pluma turbia del canal del Dique en la bahía de Cartagena

Abstract

Se describen los patrones de dispersión de la pluma turbia del canal del Dique en la bahía de Cartagena mediante el análisis de 69 imágenes SPOT y los resultados de una simulación numérica para determinar los principales mecanismos de formación de los patrones de la pluma turbia en la bahía. Se detectaron seis patrones principales de la dispersión de la pluma, mediante la selección de casos homólogos. El modelo hidrodinámico aplicado permitió imitar la pluma turbia e identificar las condiciones hidro-meteorológicas para cada uno de los patrones.Palabras claves: Bahía de Cartagena, imágenes SPOT, modelos numéricos, turbidez, canal del Dique.The dispersion patterns of the turbid plume of Canal del Dique in Cartagena Bay are described through the analysis of 69 SPOT images and the results of the numerical modeling designed to detect the principal mechanisms for the formation of the turbid plume patterns from the Dique channel at the Cartagena Bay. Six different patterns of the plume were detected based on homologous selection. The implemented hydrodynamic model simulated the turbid plume and identified the hydrometeorological conditions for each pattern.

Physiological and ecological consequences of the water optical properties degradation on reef corals

“…The strong stratification, also reported in previous studies (Pizarro et al 2017; Tosic et al 2019), results from the different properties ( e . g ., salinity and temperature) of a superficial layer directly affected by the Dique channel discharges and a subsurface clear layer of oceanic waters (Lonin et al 2004). The strong stratification of the water column seems to isolate the Varadero reef from the Dique freshwater discharges but have a critical impact on the underwater light availability and photosynthetic energy acquisition in corals.…”

“…This estimation is in close proximity to irradiance variation in other turbid-water reefs due to suspended solids (Anthony et al 2004). The observed variability is attributed to meteorological conditions affecting the Dique plume dynamics (Lonin et al 2004; Tosic et al 2019). At Rosario, although the water column is significantly clearer than Varadero, the K d ’s for the whole PAR range (0.158 m -1 ) and towards the blue part of the spectrum (0.160 m -1 at 400 nm) were still notably higher compared to other reports in clear waters (Maritorena and Guillocheau 1996).…”

“…The light sensors were cleaned and downloaded periodically (every two months or less). Visual inspections at each visit showed that sediments and biofouling were not covering the sensors, potentially related to the type of sediments of the Dique plume (mainly fine silts and clays) which tend to remain suspended in the water column (Lonin et al 2004). Even if the potential interference of sediments in the sensor's signal is low, a linear regression on the data was used for correcting cumulative signal attenuation (Fig.…”

Primer registro del copépodo Cymbasoma chelemense (Copepoda: Monstrilloida) en el mar Caribe colombiano

“…The Bay of Cartagena is located north of the department of Bolívar in the central zone of the Colombian Caribbean (Figure 1). Although it is geologically a bay, due to the significant contribution of river water from the Canal del Dique (Dique Channel), which discharges between 470.4 and 825.1 m 3 s -1 of fresh water, it is currently considered an estuary (CIOH -CARDIQUE, 1997;Garay and Giraldo, 1998;Lonin et al, 2004;Restrepo et al, 2013). The only recorded specimen, identified as C. chelemense, was found in a zooplankton sample from the area known as Ciénaga de las Quintas in the interior of the Bay of Cartagena during the low-water period (February 2016) at the station designated P01.…”

“…La bahía de Cartagena está ubicada al norte del departamento de Bolívar, zona central del Caribe colombiano (Figura 1). Geológicamente corresponde a una bahía, aunque debido al importante aporte de aguas fluviales provenientes del canal del Dique que descargan entre 470.4 y 825.1 m 3 s -1 de agua dulce, actualmente se considera un estuario (CIOH -CARDIQUE, 1997;Garay y Giraldo, 1998;Lonin et al, 2004;Restrepo et al, 2013). El único ejemplar registrado, identificado como Cymbasoma chelemense, fue hallado en una muestra de zooplancton proveniente de la zona denominada ciénaga de las Quintas, bahía interna de Cartagena, durante el periodo de aguas bajas (febrero de 2016) en la estación designada como P01.…”