The Study of Changes in Sea Level and Impact on Historic Ports, and Shipping of Caspian Sea

The Caspian Sea surface has undergone many changes and fluctuations. As the sea level has changed, many postal land has fallen underwater or parts of shallow coastal waters have left the water. In the past ten years, due to changes in the surface water of the Caspian Sea and the drop in water, a number of historic ships have been revealed. Identifying several wooden logs on the banks of Talesh, Rudsar, Neka and the Gulf of Gorgan will provide valuable information on the structure of the Caspian Sea historical ships and shipping. In this paper, which is based on field research and library study, Introducing historic ships that have emerged due to sea-level changes, the lack of older prototypes in this closed sea-due to the absence of monsoon winds, irregular wave movements, the absence of neighboring civilizations, And, consequently, the absence of maritime business routes, the progressive and sequential return of seawater and other factors will be studied. This wood is an imported product and now it comes from Russia to Iran. The oil found in the wood chips seems to have the stability of wood in the presence of water. The drilling of the lower parts of the ship showed that the body of the ship was saturated with water and its texture was sponge-shaped. The enclosure of the Neka coastal shores is made from wood-framed wood of the needle leaf trees, and puts outer-wall nails to vertical beams and internal walls.