The dredged material can vary greatly (peat and organic soils, cobbles, clays, boulders, silts, broken rock, sands, rock and gravels, cemented soils and corals), and dredging depth can vary from a few meters to more than a hundred meters.There are three different types of dredge equipment that can be used for various purposes, and it’s important to know the difference between each one in order to purchase the right tool for your particular job. Maintaining irrigation canals and reservoirs – conserve the usage of scarce water supplies.Flood control – improve or manage the flow of the tidal movement in rivers, channels, or natural waterways.Protect the beach – providing fill materials in the form of sand and rocks to replenish the beach.Environmental dredging – to prevent contamination and improve water quality to restore the affected marine area. Excavation to remove overlying soil – to reach minerals, gems, precious metals, and fertilizers lying in the sea, river, or lake. Excavation at underwater foundations – prior to placement of pipelines or tunnels for underwater infrastructure.Land reclamation for residential and industrial areas, habitats for birds or wildlife.Maintenance / increasing navigation channels – to ensure the safe passage of boats and ships. There are four phases in the dredging process: excavation, vertical transport, horizontal transport, and placement or use of the dredged material. Dredging is the process of underwater excavation of soils and rocks.ĭredging is done periodically to remove underwater sediments called silt and debris from shipping harbors, rivers, coastlines, or lakes.
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