Integrated Three-Dimensional Modeling of Water Circulation and Dynamics in The Abu-Qir Bay, Alexandria - EGYPT Eslam Al-Hogaraty Environmentalist Institute of Environment, Water and Energy, Ajman University of Science and Technology, UAE Email: eslamocean@yahoo.com;jrac.eslam.h@ajman.ac.ae The Abu-Qir Bay is a semicircular basin in the eastern part of the Alexandria city, Egypt. The Bay has a maximum depth of 15 meters and a surface area of 500 square kilometers. The water circulation in the Bay is a highly dependent on the prevailing winds and discharges of the Nile River, Lake Idku and several industrial facilities. The pattern of circulation in the Abu-Qir Bay is not stable and changes both monthly and seasonally. The present study is a numerical modeling of water circulation and dynamics in the Abu-Qir Bay. To investigate the different factors affecting water circulation in Abu-Qir Bay, the Princeton three-dimensional Ocean Model (POM) was used to simulate the water circulation in the Bay at a horizontal resolution of about 0.5 minute. The model was used to simulate circulation pattern due to the variations in wind regimes and seasonal fluctuations in the horizontal distributions of water temperature and salinity. The dimensions of simulation domain are 32 km in X-direction between Longitudes 30º 4’ E and 30º 37’ E, and 37 km in Y-direction between Latitudes 31º 25’ N and 31º 58’ N. The calibration and sensitivity analysis of the model were carried out with the use of field-measured environmental and hydrodynamic data for the Bay.