Finite Element Method for Solving Boussinesq Model for Describing the Circulation in Khor Al-Zubair Estuarine Lagoon-Northwest of Arabian Gulf

  • Sajjad K. Chasib, Hashim Abdul-Khaliq Kashkool, Ali Bassal Mahmood


Circulation in a well-mixed semi diurnal tidal inlet, i.e. Khor Al-Zubair Estuarine Lagoon, is studied at the first time based on solving of the Boussinesq equation of dispersion in two dimensions. The finite element method (FEM) ,i.e., Galerkin method, is a most precious method used to solve the oceanographic phenomena  like mixing and circulation  as used in this study. The observational data used were: Water tidal current and salinity for one tidal cycle (i.e., 13 hours) over a period of 1/5/2020to 30/6/2020 with a freshwater discharge about (84 -94) m3/s. The Galerkin method showed more suitable results for describing the circulation in comparison with actual data. The tidal flow ; the upstream freshwater; boundary friction forcing (from the bottom upward) and wind forcing (from the surface downward) showed the vertical sense to the obtained results of salinity. However, tidal flow; the upstream freshwater; meteorological rainfall flux and meteorological heat flux configured the horizontal sense to the obtained results of salinity. Finally, The Galerkin method presented differences in decimals in comparison between the actual and modeled data.