ANALYSIS OF HYDRODYNAMIC CONDITIONS IN TONE RIVER ESTUARY WITH SEA LEVEL RISE SCENARIOS

抄録

 Global warming induced sea level rise can cause various impacts to coastal regions of many countries specially islands. Effects of sea level rise in various aspects for coastal communities in Japan has analysed in many areas. This paper discusses the effects of sea level rise on estuarine hydrodynamics specially salinity intrusion along the river. A simple three dimensional model was used for the analysis. Tone river estuary was selected as an example location due to the availability of field survey data.

 Velocities were analysed for the present condition under different tidal phases and found a comparative match with the field survey data. Then the several scenarios of sea level rises were analysed for the different tidal phases ebb tide and flood tides. An increased salinity intrusion along the river was observed for sea level rise scenarios. Quantitative estimate of salinity values were obtained for each sea level rise conditions. Further, various inflow conditions caused for different salinity intrusion conditions.