Sequencing seabed morphology through bathymetric profiling on Brebes coastal area

Abstract

Abstract The sedimentation process encompasses both morpho-dynamic and hydrodynamic aspects, but hydrodynamic-related sedimentation studies have received greater attention. Our data mining shows that total publication on the hydrodynamic aspect 2% greater than the morphodynamic aspect, indicating a bias towards this aspect in sedimentation research. Morphosedimentary studies offer an alternative approach to conducting sedimentation research with a focus on the morpho-dynamic aspect. Brebes Regency, located on the north coast of Central Java, experiences significant accretion, making it an ideal location for this study. The overarching objective of this research is to analyze bed load flow patterns within the nearshore zone of Brebes Regency, Central Java, Indonesia, by considering morphosedimentary features. To achieve this, we utilized bathymetry data from sources such as GEBCO and National DEM Data (BATNAS), alongside field validation. Initial desk analysis revealed a depression in the western part of the Brebes coastal area, characterized by a depth of 15 meters, situated within the middle of the upper slope morphosedimentary region. To validate this finding, we overlaid the data with BATNAS. Subsequent analysis indicated that the depression had flattened out over time. Instead, the final results indicate that bed load flows originate in the west bay of the Brebes coastal area and flow northeastward.