Abstract
The flow mechanisms of the tidal rivers are very complicated and these are different from general rivers. The Takase River is important in the southeast of Aomori Prefecture and its estuary is a typical tidal river. We had measured the velocity and the chlorideion distributions of this river for the past three years. Furthermore, we measured the velocities, the chlorideion concentrations and water temperature at frequencies of 0.5Hz in September, 1992, and calculated the power spectrum using the these values.
