Reducing siltation in southern coasts of the Caspian Sea: Case study: Parehsar basin

Siltation in harbour basins is a problem that exists as long as harbours exist, and directly related to their basic function, providing shelter by creating quiescent conditions. In this research siltation of parehsar’s horbour has been studied since minimizing the require dredgings is of interest for such structures. Two different alternative shape of basin were evaluated whici are Japanese pattern with groin and European pattern with the entry on its right side. The results showed that the current-alone condition had insignificant effects on siltation in the study area. The results also showed that the Japanese pattern with groin was capable to reduce 23 percent of siltation in the entrance. The optimum pattern was the European one with the entry on the right side which could reduce 41 percent of siltation.