The purpose is to keep the waterway deep enough to allow vessels to enter and exit the Harbor safely. In fact, in a usual dredging cycle, self-propelled trailing suction hopper dredgers, barges and other ships spend the majority of their time sailing back and forth between extraction sites and placement sites, transporting materials between the port and the borrow site sailing between borrow sites and sailing from sites where material has been extracted to unloading or placement sites. Dredging is the process of digging up sand that has accumulated at the entrance of the Harbor and moving it elsewhere. The purpose for dredging can be maintenance of the depth or the deepening of navigation accesses or channels, it can also be land reclamation, coastal protection, seabed stabilisation for the offshore energy installations or the removal of contaminated sediments. The Central Dredging Association states that in its simplest form dredging consists of the excavation of material from the sea, river or lakebed, and the.

transporting it to the relocation site and unloading the material or object. It involves collecting and bringing up, fishing up or clearing away or out material and / or any object from the bed of a river, sea, etc. Dredging is the maritime transportation of natural materials from one part of the water environment to another by specialised dredging vessels.

Harbor dredging definition