AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Dredge definition cooking5/2/2023 ![]() However, most of the material dredged in harbors, estuaries, and at sea is dumped at sea and only minor amounts of this dredged material are beneficially used. The sediment removed by dredging can be used for reclamation, or disposed on land. Maintenance dredging campaigns are undertaken at regular intervals (eg, annually), are typically of short duration (days to weeks), and generally remove sediments with a higher proportion of finer particles. Maintenance dredging keeps previously dredged areas at the required depth. There are two major types of dredging operations ( McCook et al., 2015): capital dredging is carried out to open up new developments such as marina or port basins or widen existing channels. Apte, in Marine Ecotoxicology, 2016 10.3.5 DredgingÄredging involves the excavation or removal of sediment and/or rock from the seabed and is a routine part of port operations and of coastal and marine infrastructure developments. The chemical characteristics of this material have to be taken into consideration in any risk assessment of the consequences to the environment. The particle size characteristics of this material and the hydrodynamics of the site will determine how far it may drift before settling and this will influence the extent and severity of any physical impact outside the immediate dredging site. Most dredging activities, particularly hydraulic dredging, generate an overspill of fine solid material as a consequence of the dredging activity. Mining for ores is considered further within the section on industrial wastes. Types of material dredged can include sand, silt, clay, gravel, coral, rock, boulders, and peat. Dredging is also undertaken to win materials, for example, for reclamation or beach nourishment. These activities can generate large volumes of waste requiring disposal. Murray, in Encyclopedia of Ocean Sciences (Second Edition), 2009 DredgingÄredging is undertaken for a variety of reasons including navigation, environmental remediation, flood control, and the emplacement of structures (e.g., foundations, pipelines, and tunnels). ![]()
0 Comments
Read More
Leave a Reply. |