عنوان مقاله [English]
نویسنده [English]چکیده [English]
Water exchange between the Caspian Sea and the Gulf of Gorgan and, consequently, the sedimentation rate are very importance in coastal engineering issues. In this paper, trend of sedimentation rate in the entrance of Gorgan bay is investigated by field measurements data. In recent years, with the Caspian Level dropping, trend of sedimentation rate is increased in the Gorgan bay and its connection channel. Furthermore, falling the Caspian Sea level is caused to decrease in water exchange between the Caspian Sea and Gorgan bay. In this study, water current properties and also sedimentation rate are measure by deploying five RCM9 current meters simultaneously with four sediment trap between Bandar Torkaman and Ashoorzadeh Island. The results show that maximum quantity of current speed was less than 15 cm/s with 2.75 cm/s in average. The low speed of current is caused to increase in suspended sediments settling in the area. Sedimentation rate in the area was about 1.43 cm/yr in average. With decreasing in water level along with high sedimentation rate, water exchange between the Caspian Sea and Gorgan bay will be influenced strongly and in the near future it caused to limit in water exchange.