Hydrological Analysis of a Coastal Basin of The Guachaca River in The Department of Magdalena; Relationship Between Its Behaviour and The Morphology of Its Beaches.

Abstract

Coastal morphology can be affected by erosion corresponding to the loss of land at the continent-sea interface, exactly in the coastal zone. The physical and biological evolution of the coastal zone depends on multiple interactions between geological, climatic and oceanographic processes, including erosion and sedimentation, alteration (physical and chemical) of rocks, geological uplift and subsidence of land, precipitation, winds and storms, and waves, tides and ocean currents, among others. The interaction of these physical processes along the coastal zone leads to the discovery of highly varied ecosystems and landscapes, whose characteristics change naturally at different rates. This project sought to establish the relationship between changes in the hydrological behaviour of the Guachaca river basin in the department of Magdalena with the morphological variations of its beaches, through an analysis of littoral cells and modelling with a basin approach. Guachaca River through a Delf3D modelling and general analysis of the study area; the results obtained from the sediment input in the coastal area, in the direction of Santa Marta, show the influence of the direction of the waves in the sector. In particular, points have been identified where there is a lack of sediment due to erosion in the study area.