Abstract
The numerical model of tank-model type to simulate and predict long term behaviors of the density interface in a brackish lake is proposed. From this calculation, we recognized that the outflow mechanism of the salt water in this lake, which is very sensitive to the inflowing discharge and has two types of suction and entertainment, plays important roles for the behaviors of the salinocline in Lake Abashiri. By using the outflow model, which mixed the entrainment type with the suction one, we can simulate the behaviors of the salinocline for the last decade correctly.
