A Laboratory Study for Settling Velocities of Cohesive Sediments Entering in Semi-closed Channel

This study aims to estimate settling velocity (W s ) for cohesive sediments from water bodies (Incheon Coast, Kulpo Stream and Han River) mainly connected to the Kyeongin Ara-waterway through the laboratory settling experiments. Results of settling tests for these sediments show that W s values for sediments are quite different each other: W s values of Kulpo Stream sediments (0.01 < W s < 3.07 mm/s) are quite similar with those of Han River sediments (0.01 < W s < 2.97 mm/s) over the whole range of suspension concentration C (0.1 < C < 90 g/ L), while they are quite different with those for Incheon Coast sediments (0.01 < W s <0.92 mm/s). Qualitative analyses on test results for physicochemical properties of sediments and waters with respect to settling velocities show that these differences in settling velocities are mainly due to the salinity difference in the water.