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Abstract The present thesis deals with the topic of interfacial waves. This type of waves occurs on the common surface between two or more layers of liquids or fluids. The main cause of these waves is the gravitational field. In this thesis the study is confined to two layers of incompressible inviscid fluids of which the lower fluid lies over the inclined plane rigid bottom. This problem is met with in oceanography. Oceanographers have shown the importance of internal gravity waves within regions of the ocean with substantial density stratification. As it is already known in oceanography the density of sea water is effectively dependent on three variables, namely: pressure, temperature and salinity which is a measure for the proportion of dissolved salts matter. Research ships equipped with instnnnents called ”Temperature-salinity-depth” recorders showed that the density changes due to variations in temperature and salinity are much more important for internal waves dynamics than the variations in pressure. |