The Northern coastal lakes in the Nile Delta of Egypt which have an ecosystem of distinctive nature is facing several problems which threaten, There are two main problems facing the coastal region of the delta, The first one is the erosion due to dynamic effects and reduction in sediment transport, the northern lakes connected to the Mediterranean Sea severely suffer from pollution due to dumping wastewater from agricultural, municipal as well as industrial origin into the lake. Hydrodynamic modeling is an essential tool to simulate the combined effect of these physical factors. Modeling the circulation pattern inside the lake is considered an essential tool in order to investigate the Lake water balance.