Dredged meaning9/22/2023 ![]() Kyle Mizokami, Popular Mechanics, 6 June 2023 The 75 families who lived on Tatuoca island began to question the benefits of the port complex expansion in 2009 when a dredger began scooping up chunks of the seabed to accommodate big ships. Amy Brady, Scientific American, 20 June 2023 Chuan Hong 68 was built in 2014, and is described as a grab dredger, or a ship that uses a large claw to remove items from the ocean floor. ![]() 2021 First came the dredgers, the scientists who dragged giant shovels behind sailing ships and picked through the biological rubble. Vivian Yee New York Times, Star Tribune, 27 Mar. Kyle Mizokami, Popular Mechanics, 9 June 2023 Several dredgers, including a specialized suction dredger that can extract 2,000 cubic meters of material per hour, were digging around the vessel's bow, which is wedged into the canal's eastern bank. William Booth, Washington Post, 24 July 2023 But recently, Beijing laid claim to 90 percent of the 1.3 million square-mile sea, and has used dredgers to expand dozens of islets and shoals, fortifying them with anti-ship and anti-air missiles, and military-grade airfields. 2023 All this was happening in the narrow confines of navigable waterways busy with commercial traffic, as container ships, sand dredgers, tug boats and ferries made their way through the race. 2023 Dotted along the shoreline are dredgers completing work to add artificial sand, groynes, jetties and breakwaters to prevent further coastal erosion. Kyle Mizokami, Popular Mechanics, 18 Aug. Environmental Protection Agency provides oversight and authorization for the disposal of dredged materials.Noun China has expanded several islands in the South China Sea, using dredgers and cement machines to not only broaden the size of islets, but build permanent features like seawalls, airfields, and buildings. Army Corps of Engineers issues permits for the disposal of dredged material the U.S. The disposal of dredged material is managed and carried out by federal, state, and local governments, as well as by private entities such as port authorities. NOAA's Office of Response and Restoration plays a major role in protecting and restoring marine natural resources when environmental damage occurs. These pollutants are introduced to waterways from point sources such as sewer overflows, municipal and industrial discharges, and spills or may be introduced from nonpoint sources such as surface runoff and atmospheric deposition. This environmental dredging is often necessary because sediments in and around cities and industrial areas are frequently contaminated with a variety of pollutants. ![]() Since massive ships carry the bulk of the goods imported into the country, dredging plays a vital role in the nation's economy.ĭredging is also performed to reduce the exposure of fish, wildlife, and people to contaminants and to prevent the spread of contaminants to other areas of the water body. This water depth continues to increase over time as larger and larger ships are deployed. Vessels require a certain amount of water in order to float and not touch bottom. It is a routine necessity in waterways around the world because sedimentation-the natural process of sand and silt washing downstream-gradually fills channels and harbors.ĭredging often is focused on maintaining or increasing the depth of navigation channels, anchorages, or berthing areas to ensure the safe passage of boats and ships. ![]() Dredging is the removal of sediments and debris from the bottom of lakes, rivers, harbors, and other water bodies. ![]()
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