Sediment characteristics and water circulation of Big Jemsa Bay, Red Sea, Egypt

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Big Jemsa Bay is one of the indentations dissecting the continuity of the Red Sea north-western shoreline. The data was collected from bathymetric survey, current meters and sediment samples. Analyses have been undertaken of coastal processes, seabed morphology, grain size characteristics and the effect of current circulation on the distribution of sediment characteristics. The sediment pattern varies from coarse sand in the southern part to silt and fine sand in the northern part. The central part of the study area is mainly composed of terrigenous isometric-medium sand facies. The sorting distribution of sediments varies from moderately well sorted to poorly sort. The significant factors that control the sediment transport process are downslope gravity and wave-induced currents that are affected by the seafloor configuration and the shoreline orientation. According to the circulation effect on the sediment transport of the study area where deposition of fine sand and silt was observed in the northern part. Because sediment transport mitigates the occurrence of pollutant deposition in this part of the bay, we recommend that future constructions along the bay should be in the southern part.

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