CROSS-SHORE PARTICLE SIZE CHARACTERISTICS AND PROFILE EVOLUTION ALONG THE GHANAIAN COASTLINE

Keywords: erosion structures, particle size, beach profile, morphology, sorting
Session Type: Virtual Paper Abstract
Day: Monday
Session Start / End Time: 2/28/2022 03:40 PM (Eastern Time (US & Canada)) - 2/28/2022 05:00 PM (Eastern Time (US & Canada))
Room: Virtual 39

Abstract

The changing coastline of Ghana, due to high population along the coast, has resulted in the problem of erosion. The phenomenon is highly influenced by both natural and anthropogenic factors. This called for the implementation of ad hoc measures to solve the problem. However, the problem is further complicated by the mitigation measures put in place. The study sought to examine the source area characteristics in profile evolution that influence the mechanism of erosion.
Beach profiling, particle size and waves analysis by means of mathematical models to examine the morphology of five beaches along the Ghanaian coastline within two seasons. This was done to establish the seasonal variations in beach state, profile evolution that impact on erosion in general along coastal erosion structures. Findings showed all beaches were moderately sorted with sorting values ranging from 1.70 to 1.85 in both seasons. It was also found out that the dominant grain size along all study sites were the 250 μm in dry season and 500 μm in wet season. The beaches were made up of fine to medium grains which are finer in texture are resulted in erosion. Percolation was minimal due to the dominant grain size and led to increased wave runoff which caused erosion of the beach face. Beaches showed seasonal variability in volume and width.