Numerical simulation for flushing rate in Bardawil lagoon,Egypt

The bardawil lagoon along the northern coast of sinai,is one of the largest salt water lagoons in egypt. it is an important lagoon for fishing. the inlets of the lagoon are subject to changes in the morphology over time,including sediment infilling of the inlet channels. this leads to reduced water exchange between the lagoon and the sea resulting in poor circulation in the lagoon. the hydrodynamics is calculated inside the bardawil lagoon using the rma-10 model. the flushing calculations are simulated using the advection dispersion of a conservative material inside the lagoon using the rma-11 model. several alternatives are considered to reduce the flushing time of the lagoon and improve water exchange. adding two inlets at the west and the east provided the best results flushing time 40% of existing value. the use of one new inlet to the west is found to be the second best alternative.