Repositorio Digital Marítimo, Fluvial y Costero

Fajardo Espinosa, Óscar Javier and Lonin, Serguei A.. (2021). Coastal dynamics in the barrier reef located in the northeastern sector of San Andres Island, Colombian Caribbean. Bol. Cient. CIOH, 40 (2). pp. 13-33. doi https://doi.org/10.26640/22159045.2021.525

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Abstract

The breaking wave-induced hydrodynamics over the coral reef barrier of the Seaflower Biosphere Reserve, located in the northeast sector of the San Andrés Island, was characterized. Similarly, the effects of the coral reef on possible hydrodynamic processes and its function as a natural barrier against coastal erosion in adjacent areas were described. For this study, high-resolution bathymetric information was obtained via echo-sounding and data-processing of satellite images of the shallower areas. Furthermore, numerical modelling using the Lithodynamic Coastal Zone (LIZC; Litodinámico de la Zona Costera) model along with the spectral wave module (SWAN; Simulating Wave Nearshore) was performed. Additionally, real-time modelling (now-casting) run throughout one year provided details on dynamic patterns and determined the breaking point of the waves upon their arrival to the coral reef. Results displayed a bi-modal behavior of the studied area’s hydrodynamics which was significantly dependent on the waves’ height, period, and direction thresholds. Moreover, the average wave energy flow was identified as being responsible for the evolutionary growth of the barrier on its current location and orientation. Although this pilot study focused on the northeast sector of the San Andrés Island, the present methodology could be applied on similar scenarios where shorelines are naturally protected by coral reefs.

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Item Type:	Article
Uncontrolled Keywords:	Arrecife de coral. Hidrodinámica costera. Modelación numérica. Climatología del oleaje. Altura crítica de rotura del oleaje
Geographical coverage :	Colombia. Isla de San Andrés
Depositing User:	Dirección General Marítima
ISSN:	2215-9045
Official URL:	https://ojs.dimar.mil.co/index.php/CIOH/article/vi...
Identification Number:	https://doi.org/10.26640/22159045.2021.525

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