Preliminary Assessment to Sediment Evaluation on the Estuary of Bengawan Solo River

The study focused on the sediment's grain size distribution, sediment soil properties classification, and salinity. The research team collected primary data from the field, including bedload sediment and salinity measurements, and conducted laboratory investigations to analyze the sediment characteristics. The sediment particle size is a crucial parameter in sediment transport studies, and the settling velocity can be predicted based on the sediment particle size. The classification of sediment materials is based on the sediment particle size, with different classes including boulders, cobbles, gravel, very coarse sand, coarse sand, medium sand, fine sand, very fine sand, coarse silt, medium silt, fine silt, very fine silt, coarse clay, medium clay, fine clay, very fine clay, and colloids. The salinity of water is the concentration of salt dissolved in it, and it can be classified into freshwater, brackish water, saline water, and brine based on the percentage of dissolved salts. Factors affecting salinity include evaporation, rainfall, and the number of rivers emptying into the sea. The salinity levels in the Bengawan Solo River estuary were found to vary between 120-140 ppm in the flood season and 2.5-3.68 ppt in the dry season. The sieve analysis results showed that the sediment material at the scene before branching river estuary was dominated by fine sand sediment material. The salinity values also showed a variation between 120-140 ppm in the flood season and 2.5-3.68 ppt in the dry season. The high temperatures near the surface also affected the level of salinity. The study concluded that the characteristics of sedimentary material on the estuary of Bengawan Solo River were dominated by fine sand sediment material. The sediment particle size and salinity levels were found to vary depending on the season, with higher salinity levels in the dry season and lower salinity levels in the flood season. The study's findings can be used to inform future sediment transport studies and management of the Bengawan Solo River estuary. The research team collected primary data from the field, including bedload sediment and salinity measurements, and conducted laboratory investigations to analyze the sediment characteristics. The study's methodology involved collecting data from the field and conducting laboratory investigations to analyze the sediment characteristics. The results of the study were presented in the form of sieve analysis results, salinity values, and a conclusion. The study's findings have implications for the management of the Bengawan Solo River estuary, particularly in terms of sediment transport and salinity levels. The study's results can be used to inform future sediment transport studies and management of the estuary. The study's methodology and results can also be used as a reference for future studies on sediment transport and salinity levels in other estuaries.