Author(s): Mikio Sasaki; Hitoshi Tanaka; Makoto Umda
Linked Author(s): Mikio Sasaki, Hitoshi Tanaka
Keywords: River mouth; Estuary; Saltwater; Stratified flow; Saltwater edge; Brackish environment; Mixture coefficient; Diffusion foctor
Abstract: The present study aims to investigate the characteristics of the motion of salt water and to show temporal fluctuation of salinity in Lake Jusan located in the estuary of Iwaki River in Aomori Prefecture, Japan. Lake Jusan is the best productive water area of the shellfish, corbicula, in Japan in 2013. Then, the lake is very important in Aomori Prefecture as corbicula’s home. Then, it is important to make clear the characteristics of the motion of salt water in the lake. In the present study, observations for the motion of the salt water going up to the lake and going down from the lake to the sea were carried out from June to October. The time change of the salinity distribution in a perpendicular direction is investigated in the field observation in the present study. The vertical distributions of the salinity are shown clearly by theory and observations. And the present study shows that the theory given by Sasaki, Tanaka and Umeda can generate well the movement of the saltwater in the lake.
Year: 2015