Using a machine to dig up and sought through alluvial gravel's in a watercourse.
The removal of material from the bottom of water bodies using a scooping machine. This disturbs the ecosystem and causes silting that can kill aquatic life.
Excavating under water, usually to create or deepen a harbour or canal.
removal of material from the bottom of a water body by excavation or similar removal activity.
A method of catching shellfish (oyster, mussels, clams, scallops) in which a dredge net is dragged along the ocean floor. Dredging not only produces significant bycatch but also degrades habitat by damaging the ocean bottom.
_ Widening or deepening of water channel by removing sand, mud, silt, or gravel. Dredging can be accomplished using suction pumps or mechanical scrappers.
Mechanical removal of sediment from the bottom of water bodies, usually done to allow navigation in areas which are naturally shallow.
Raising silt and loose sand in a scoop or via suction. Used for minerals such as alluvial gold and tin.
the removal of sediments from an estuary's floor.
a method of removing sediments from the bottom of a river or stream and thus deepening its channel.
deepening a waterway using a machine to remove bottom sediment.
Physical methods of digging into the bottom of a water body to remove sediment, plants or other material. Dredging can be performed using mechanical or hydraulic equipment.
a method for deepening streams, swamps, or waters by scraping and removing solids from the bottom.
a method used for harvesting bivalve molluscs such as oysters, clams and scallops from the seabed.
The removal of soils from under water, using the water as a means of transportation to convey the soils to final positions.
The excavation of sediments and other material from aquatic area for the purpose of maintaining adequate depth in navigation channels and berthing areas as well as for other purposes.
The various processes by which large floating machines, or dredges scoop up earth material at the bottom of a body of water, raise it to surface, and discharge it into a pipeline or barge, or return it to the water after removal of ore minerals
Removal of earth from the bottom of waterways in order to create and maintain channels, canals, and marinas or to obtain deposits of sand, gravel, and shells, for construction materials. Dredging is also used to "clean up" contaminated sediment.
excavation, scraping, digging, draglining, suction dredging to remove sand, silt, rock or other underwater sea bottom material.
A process whereby machines equipped with scooping or suction devices remove mud etc., in order to deepen a waterway.
Any of various machines equipped with scooping or suction devices and used to deepen harbours and waterways.
A mining process specific to placer deposits associated with ancient alluvial or glacial activity.
the scooping out of the bottom or sides of an area of water or wetland with machines so that the body of water becomes deeper or wider and all of the bottom vegetation is removed.
Excavatiging underwater, usually with floating equipment; it may be an elevator ladder, hydraulic suction, grapple, grab or dipper bucket, scraper, dragline, clam shell or backhoe.
Digging up and removing material from wetlands or waterways, usually to make them deeper or wider.
The removal of materials including, but not limited to, rocks, bottom sediments, debris, sand, refuse, and plant or animal matter in any excavating, cleaning, deepening, widening or lengthening, either permanently or temporarily, of any tidelands, rivers, streams, ponds or other waters of the Commonwealth, as defined in 310 CMR 9:04.
to deepen a waterway with a dredging machine See also: Great Lakes Dredging Team
The removal of sediments from the estuary and ocean floor.
(SMP) Excavation or displacement of the bottom or SHORELINE of a water body. Dredging can be accomplished with mechanical or hydraulic machines. Most is done to maintain channel DEPTHS or berths for navigational purposes; other dredging is for shellfish harvesting or for cleanup of polluted sediments.
Removal of mud from the bottom of water bodies. This can disturb the ecosystem and cause silting that can kill or harm aquatic life. Dredging of contaminated mud can expose biota to heavy metals and other toxics. Dredging activities are subject to regulation under Section 404 of the Clean Water Act.
the removal of sediment from a channel to produce sufficient depths for navigation
A method for deepening streams, lakes, or reservoirs by scraping and removing solids from the bottom.
A gold mining method in which a barge or boat equipped with machinery scoops the gold-bearing gravel from the river beds. The gravel is then processed by washing or sluicing. Seldom used in the Mother Lode, but common on the rivers of the San Joaquin and Sacramento valleys.
use of motorized equipment to clean, deepen, or widen areas inundated with water.
The process of using a floating machine for scooping up or excavating material from the bottom of a body of water, raising the material to the top, and processing the material to remove the gold. Today it refers to suction dredges.
Removal of mud from the bottom of water bodies. This can disturb the ecosystem and causes silting that kills aquatic life. Dredging of contaminated muds can expose biota to heavy metals and other toxics. Dredging activities may be subject to regulation under Section 404 of the Clean Water Act.
Dredging is an excavation activity or operation usually carried out at least partly underwater, in shallow seas or fresh water areas with the purpose of gathering up bottom sediments and disposing of them at a different location.
