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Dredging can be done to recover materials of commercial value; these may be high value minerals or sediments such as sand and gravel that are used by the construction industry. [2] Dredging is a four-part process: loosening the material, bringing the material to the surface (together extraction), transportation and disposal. [1]
Rainbowing is the process in which a dredging ship propels sand that has been claimed from the ocean floor in a high arc to a particular location. This is used for multiple purposes, ranging from building up a beach to prevent erosion to constructing new islands.
Land dredging is also another method of land reclamation. It is the removal of sediments and debris from the bottom of a body of water. It is commonly used for maintaining reclaimed land masses as sedimentation, a natural process, fills channels and harbors.
A process known as elutriation is used, whereby flowing water separates the grains based on their size, shape, and density. Sand mining is a direct cause of erosion, and impacts the local wildlife. [6] Various animals depend on sandy beaches for nesting clutches, and mining has led to the near extinction of gharials (a species of crocodilian ...
Construction equipment being used to dig up rocky ground. Although humans are capable of digging in sand and soil using their bare hands, digging is often more easily accomplished with tools. The most basic tool for digging is the shovel. [1] In neolithic times and earlier, a large animal's scapula (shoulder blade) was often used as a crude ...
These are used for road construction, port construction, pond and canal dredging, and as pile driving rigs. These types are built by crane manufacturers such as Link-Belt and Hyster . The much larger type which is erected on site is commonly used in strip-mining operations to remove overburden above coal and more recently for oil sands mining.
Airlift (dredging device) – Dredging device using injected air to move water and entrained load up a pipe; Gas lift – Raising a fluid by introducing bubbles of gas into the outlet tube; Pipe network analysis; Pulser pump – Gast lift device for pumping water; Water eductor – Type of pump used in archeology
A suction excavator, or vacuum excavator, is a construction vehicle that removes heavy debris or other materials from a hole on land using vacuuming. Suction excavators are meant to be less destructive than regular excavators . [ 1 ]
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