Investigating Causes of Emergence of Bushehr, Deylam and Rig Ports during Safavid Period

In this research,the reasons for the formation of Bushehr, Deylam and Rig ports during the Safavid period have been extracted from historical and geographical sources. The study of the fields of the emergence of these ports and their impact on the developments of the Persian Gulf from Safavid to Qajar periods was the reason for this research. This research was conducted in an analytical and library method along with surveying-field studies. The new and recent geographic and historical findings show that the emergence of these ports comes from following factors:The decline of ports adjacent to these ports, the presence of colonialism in the Persian Gulf, the climatic attractions of these ports, the inland plateau migration,
 the maritime route of ships and shelters and markets, the need to fight the colonialists.
Therefore, the historical sources examined in this study indicate that the emergence of these three ports was involved in the restoration and revitalization of Iranian naval authority in the Persian Gulf, and the significance of these ports is apparent in the development of maritime commerce, the development of military power of the country and the confrontation with the colonialists and the administrative, political, and social development of coastal cities.