Dinámica marina y sus efectos sobre la geomorfología del Golfo de Morrosquillo

Abstract

This report presents the results from a meteorological and sedimentological study, of the Golfo de Morrosquillo during the dry season (February/93), where the speed and direction of the wind acted as determinant factors in the circulation of the waters, which was defined from the following parameters: Distribution of the (haline) and thermal fields, transit of the sediment deposited on the surface of the marine bottom, horizontal and vertical repartition of turbidity, determined on samples and gauging and analysis of a SPOT satellite image.

The morphologic analysis through the comparison of the coastal line images and aereal photographies from different years, allowed to establish the principal coast morphologic variations in these zones.

The effect of diffraction and refraction of the surf front the Punta San Bernardo and the compensation arriving to the Mestizos arrows, and the flow originated by the winds produces to principal currents: One in direction south-east starting form Punta San Bernardo, that is displaced toward the east of the Gulf and the other east skirting the coast south and south-east.

The principal morphological changes of the coastal line were introduced in the south sector of the Gulf. As result of the process of sedimentary accretion originated starting 1938 the delta of the Sinú river as its discharges in the Tinajones zone, evolution that continues. The erosive phenomen on has affected considerably the body of the Mestizos arrow, the marine terrace east of the spike and the sector of beaches between Coveñas and Tolú.