Beach Morphological Dynamics at Cocos Bay (Manzanilla), Trinidad

Authors

  • Junior Darsan Department of Geography, University of the West Indies, St. Augustine, Trinidad, West Indies

DOI:

https://doi.org/10.4138/atlgeol.2013.008

Keywords:

Beach Dynamics, Beach Morphology, Tidal cycles, Sedimentology, Manzanilla Beach

Abstract

The Manzanillabeach in Cocos Bay, Trinidad is a barrier beach that protects the freshwaterNariva Swamp from the marine environment of the Atlantic. The Manzanilla beachis a very dynamic system owing to the open bay morphology, and its exposure tothe Atlantic Ocean. This study evaluated thespatial and temporal morphological and sedimentological characteristics,alongside hydrodynamic conditions operating on the beach. This studyinvestigates the beach’s response to tidal cycles diurnally, from spring toneap tide, and seasonally. Data from nine sites during the period December 2005to September 2007 are analyzed. Coastal parameters such as beach profiles,littoral data and sediment samples were obtained using standardgeomorphological techniques. The beach volumetric changes that occurred overthe tidal cycles are also quantified. Results indicate that wave height andwave energy were good predictors of beach change. The study showed that erosionwas linked to rising tide and accretion to falling tide diurnally. Erosionoccurred during spring tide conditions and accretion dominated during neaptides. Seasonally more erosion occurred in the winter period (dry season) andbeach changes in the summer period (wet season) were controlled by theformation and migration of bars.

Author Biography

Junior Darsan, Department of Geography, University of the West Indies, St. Augustine, Trinidad, West Indies

Principal Research OfficerOceanography and Coastal Dynamics,Institute of Marine Affairs,Hilltop Lane,Chaguaramas,Trinidad, W.I.

Downloads

Published

2013-11-15

How to Cite

Darsan, J. (2013). Beach Morphological Dynamics at Cocos Bay (Manzanilla), Trinidad. Atlantic Geoscience, 49, 151–168. https://doi.org/10.4138/atlgeol.2013.008

Issue

Vol. 49 (2013)

Section

Articles

License

Material contained in Atlantic Geology is normally copyrighted by the journal. Permission to photocopy for internal or personal use or for the internal or personal use of specific clients is granted by Atlantic Geology to libraries and other users.  Other requests should be addressed to one of the journal editors, or sent to Atlantic Geology, Box 116, Acadia University, Wolfville, NS, Canada B4P 2R6. Permission to use a single graphic for which Atlantic Geology owns copyright is considered “fair dealing” under the Canadian Copyright Act and “fair use” by the journal, and no other permission need be granted, subject to the image being appropriately cited in all reproductions. The same fair dealing/fair use policy applies to sections of text up to 100 words in length.