1. INTRODUCTION: ALTHOUGH INDUSTRIAL DEVELOPMENT OF HUMAN SOCIETY LEADS TO THE EXPANSION OF URBANIZATION, IT CAUSES IRREPARABLE DAMAGE ON ENVIRONMENT.STORM SURGE PHENOMENON CAUSES TO ADD A LARGE AMOUNT OF WATER TO GULFS TEMPORARILY. THE INPUT FLOW FROM THE CASPIAN SEA IS DUE TO WIND. IN THIS STUDY, FLOW HAS BEEN SIMULATED BY A TWO-DIMENSIONAL MODEL BECAUSE OF THE GEOMETRIC DIMENSIONS AND LOW DEPTH.A COMPUTER PROGRAM HAS BEEN PREPARED FOR POLLUTANTS DISTRIBUTION MODELING IN THE GORGAN GULF, THE HYDRODYNAMICS DATA HAVE IMPORTED FROM ANALYSIS RESULTS OF FLOW BY AVAILABLE SOFTWARES, ON THE BASIS OF COMPUTATIONAL PROCESSES TO PREDICT THE DISTRIBUTION OF POLLUTANTS.