Lake Abashiri is a brackish lake located at Abashiri river mouth and forms two-layer structure of salt and fresh water. Here, we analyze the long-term. behaviors of the halocline, defined as boundary of the two layers, from time series of annual precipitation and discharge in Abashiri river basin. Using a echo sounder for taking photographes of the halocline, we could show short-terth behavior of the halocline caused by snow melt flood, strong wind and the intrusion of salt water to this lake

more »

... om the sea during flood tide. We carried out numerical analysis regarding the short-term behaviors of the two layers in Lake Abashiri when the wind is blowing hard.