The Effects of Khozeini Canal Reopening on the General Current Pattern in the Gorgan Bay

In this investigation, 2D modeling results of current pattern using MIKE 21 FM model to investigate the effects of Khozeini canal reopening on the general current pattern on the Gorgan bay under 24 different scenarios were compared. Modeling on the two types of unstructured meshes for 5 hours, 50 minutes and with 30 seconds time steps were implemented. In all of the modeling, mean annual precipitation, evaporation and 13 rivers input to the bay as well as the effect of dominant eastern wind with 6 different speeds were used. The effects of components of waves radiation induced of dominant wind by implementation of the wave model of MIKE 21 NSW in the 6 distinct scenarios are considered in the hydrodynamic model of MIKE 21 FM. In order to considering of the boundary conditions at the open boundaries, mean maximum discharges of inlet and outlet in the Ashoradeh-Bandartorkaman spans and Khozeini canal were used. Simulation results represented that the current pattern in Gorgan Bay is influenced by the inlet and outlet discharge at the spans of Ashoradeh-Bandartorkaman and prevailing wind. Reopening of the Khozeini canal has no significant effect on the general circulation current pattern of the bay and only in areas very close to the canal changing local current pattern to be North-South. In stormy times, the maximum current velocity of 0.23 meters per second observed in areas close to the canal.