Sedimentology
Sedimentation driven by tidal currents produces characteristic sedimentary structures such as tidal beddings and particularly tidal rhythmites. These structures provide information regarding sedimentation rate, tidal prism, tidal frame, tidal asymmetry, depositional environment, and seasonality in river discharge.
Tidal rhythmites
Unlike typical rhythmites, those in the Yeochari tidal flat are formed in the middle to lower intertidal zone, where wave actions are significant. It is interesting to unveil the facts that how the rhyhmites do form in such a mixed energy condition in an open-coast tidal flat.
Cyclic steps
Cyclic steps are supercritical flows that commonly develop in the macrotidal flats. Despite growing interest on their occurrences, their role in channel morphodynamics in tidal environment is seldom studied. We study the temporal and spatial occurrence of cyclic steps and explore their impacts on sedimentary facies and channel morphodyanmics.
Tidal bores
Tidal bores are one of the most dynamic features that you can find in a tidal system. We study hydrodynamic and sedimentologIcal characteristics of tidal bores developed in the Sittaung River estuary, Myanmar.
Decadal changes
Surface sediments of macrotidal flats shift over seasonal, annual, and decadal time scales due to physical processes, channel migration, sea-level changes, and anthropogenic influences. We study decadal changes of surface sediment distribution in the Yeochari tidal flat, the largest tidal flat in Korea. Preliminary results indicate that wave activity is crucial in controlling the spatiotemporal variability of the sedimentary record.
