It was clear through our investigation that the water level in connected waters changed with condition of climate or atmospheric phenomena. In this paper, the relation between pressure distribution-wind field-water level change-internal flow were studied. The wind field and sea water level change were strongly effected by pressure distribution. And moreover, water level each lake was influenced by the change of sea water level. So, difference of water level grew among connected waters. This phenomena and wind field were combined and then currents in enclosed brackish waters occurred.