Abstract
The oceanographical conditions due to intemal tides which have been observed at Nomi Bay are examined by a numerical experiment with a two-layer stratified flow model. When the fluctuations of surface tide and the interface are given with the inversion phase at the mouth of Susaki Bay, the intemal tides are amplified and the stratified flows are formed. The computed values are consist with the observed values of current velocities and the amplitude of the intemal tides. It is indicated that the amplification of the intemal tides at Nomi Bay is considered to be due to the resonance phenomenon and is closely related to the local bottom topography.
A method for the improvement of water quality in area such as a mariculture ground where the intemal Waves intrude into a shelf is discussed. The effectiveness of the enhanced sea water exchange by density current ditch is examined by a bydrauric experimental model. The effectiveness is estimated to be stronger when the thickness of lower layer is thimer and the bottom friction stress is larger.
