Effects of Tidal Currents and Waves on Bottom Suspended Sediment Fluxes off Two River Mouths

Effects of tides and waves on bottom suspended sediment fluxes were studied by conducting a series of field measurements. The measurements were conducted simultaneously at inlet of Hamanako (a semi enclosed bay) and river mouth of Tenryu river. The effects were investigated by analyzing time series data of tide level, currents, waves and bottom turbidity levels. The comparisons explain that the turbidity at the two observation points give different responses to the tides and waves. Bed shear stresses of waves and currents were calculated separately to see the contribution of the elements to the bottom turbidity levels.