Hydraulic dredgers work on the principle of adding large amounts of process water to change the original structure of the sediments, and.Mechanical dredgers which are suited for working in confined areas and are useful for removing the hand-packed material or debris,.Reclamation of areas damaged by oil spills or natural calamitiesĪlthough dredging can have very harmful effects on the marine and aquatic environment, in some situations it may be the only option available.īroadly the types of dredgers are classified into three categories (On the basis of the method employed for transportation, of dredged material from the bottom of the sea to the surface of the water):.Removal of contaminants from the sea bed.for replenishing the sand on public beaches which might have undergone severe coastal erosion.making water navigation or fishing easier in shallow waters.The sediments might be gathered for purposes like:

The excavation carried out in either shallow or fresh waters with the aim to gather up the sediments located in the bottom to dispose of at another place is called Dredging. from the seabed is referred to as a dredger ship or more commonly a dredger.ĭredgers are of great importance, as they serve the purpose of ensuring the necessary safe bottom clearance for safer voyages. In a more general sense, a ship equipped with an excavation tool that is capable of weeding off depositions such as sand, gravel, sediments, etc. A marine vessel fitted with a device(s) to scrap or suck the sediment deposition over a sea bed is known as a dredger (The device used for excavation and scraping of the sea bed is called the Dredge).

Modern gold dredge