Changes in the geomorphology and littoral environment associated to dredged of seabed in Moa, Cuba
Keywords:
dredging, seabed, carbonated mud, Cayo Moa bay, coastal geomorphology, geodynamic processes, sedimentation.Abstract
Geomorphological and environmental modifications that originate the dredging of carbonated mud in Cayo Moa bay were analyzed. Bathymetric data of different dates (1972, 2001 and 2010) were compared to evaluate the geomorphological changes in the bottom of the bay; also were determined elements as Fe, Ca, K, Al and Si in sediment samples. The Ratio Matching method was applied to determine the predominant orientation of the flows and their possible nexus with the background transformations. It was verified that dredging transforms the sedimentation medium into its geometry, the available sedimentary load and the energy involved in the sedimentation process. From the ecological point of view, dredging in the Cayo Moa bay of has contributed to the deterioration of life forms, impacting the marine environment through the increase of suspended and dissolved solids, changes in the morphology of the bottom, erosive and sedimentary dynamics and the loss of natural structure and floristic biodiversity in areas affected by extraction.Downloads
References
AZCUY, E.; PÉREZ, E.; CAMPOS, M.; GARCÍA, A.; OLIVERA, J.; FERNÁNDEZ, L. & AIRAS, C. 2001: Interpretación y correlación entre los datos aportados por los levantamientos geofísicos y de pozos para la caracterización morfoestructural de la plataforma marina al sur de cayo Moa Grande, Holguín. Revista Internacional de Ciencias de la Tierra. Mapping Interactivo 73: 80-90.
CENTRO DE CIENCIAS ECOLÓGICAS. 1999: Guía de protección ambiental. Material auxiliar para la identificación y evaluación de impactos ambientales. Consulta: 31 ene 2007. Disponible en: http://www.ces.iisc.ernet.in/energy/HC270799/HDL/ENV/envsp/Vol215.htm
CERVANTES, Y.; ALMAGUER, Y.; PIERRA, A.; OROZCO, G. & GURSKY, H. 2009: Variación de la dinámica erosiva y acumulativa en cayo Moa Grande, bahía de Cayo Moa, Cuba. Período 1972–2007. Minería & Geología 25(4): 1-16.
CERVANTES, Y.; ALMAGUER, Y.; PIERRA, A.; OROZCO, G. & GURSKY, H. 2011: Metales traza en sedimentos de la bahía de Cayo Moa (Cuba): evaluación preliminar de la contaminación. Minería & Geología 27(4): 1-19.
CUETO, F.; RONDÓN, E. & FUENTES, R. 2003: Efluente líquido (WL) de la tecnología de lixiviación ácida: alternativas de tratamiento. Minería & Geología 3(4): 1-6.
INTERNATIONAL SEABED AUTHORITY. 2007: Tecnología para la exploración y explotación de los fondos marinos. Consulta: 29 oct 2007. Disponible en: http://www.isa.org.jm/files/documents/ES/Brochures/IA10_SPA.PDF
OFICINA NACIONAL DE ESTADÍSTICA E INFORMACIÓN. 2014: Anuario estadístico de Moa 2013. Versión 2014.
MENÉNDEZ, M. 2001: Explotación racional del yacimiento de Cienos Carbonatados en la bahía de Cayo Moa. (Tesis de maestría) Instituto Superior Minero Metalúrgico. 68 p.
MIZUMURA, K.; NISHIMOTO, T.; YAMAMOTO, T. & TSUTSUI, H. 1995: Prediction method of sand movement direction in water by geochemical elements. Environmental Geology 25(2): 100-108.
MORALES, G. 1999: Recursos no renovables de los fondos marinos. Pontificia Universidad Católica de Valparaíso. Consulta: 24 mar 2007. Disponible en: http://biblioteca.ucv.cl/poseidon/libros/libro3/i41.html.
Published
How to Cite
Issue
Section
- Authors retain copyright and guaranteeing the right magazine to be the first publication of the work as licensed under a Creative Commons Attribution-NonCommercial that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors may establish separate supplemental agreements for the exclusive distribution version of the work published in the journal (eg, place it in an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are allowed and recommended to disseminate their work through the Internet (e.g., in institutional telematic archives or on their websites) before and during the submission process, which can produce interesting exchanges and increase citations of the published work. (See The effect of open access)