The Deadly Global War for Sand WIRED
26 Mar 2015 In some places multinational companies dredge it up with massive machines in others local people haul it away with shovels and pickup trucks As land quarries and riverbeds become tapped out sand miners are turning to the seas where thousands of ships now vacuum up huge amounts of the stuff from nbsp
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Dredging is an excavation activity usually carried out underwater in shallow seas or freshwater areas with the purpose of gathering up bottom sediments and widening
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Dredging Wikipedia
They featured barge mounted excavators Small backhoe dredgers can be track mounted and work from the bank of ditches A backhoe dredger is equipped with a half open shell The shell is filled moving towards the machine Usually dredged material is loaded in barges This machine is mainly used in harbors and other nbsp
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environmental safeguards needed for sustainable extraction of river sand and gravel There is a need to protect the environment and the right of the population to live in clean and safe surroundings with the need to No obstruction to the river flow water transport and restoring the riparian rights and in stream habitats
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Cleaning Coovum is not a one day or one month or even an one year work It is in fact not a time bound activity and is a permanent process The fate of the Chennai rivers changed after the artificial Harbour was built in Chennai Madras in late 19th century The Bay of Bengal has an unique way of moving coastal sand in nbsp
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Sand mining Wikipedia
Sand mining is a practice that is used to extract sand mainly through an open pit However sand is also mined from beaches inland dunes and dredged from ocean beds and river beds It is often used in manufacturing as an abrasive for example and it is used to make concrete It is also used in cold regions to put on the nbsp
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The Mississippi River Is A Land Making Machine Dredgefest 2014
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Centre plans trash cleaning machines law on Ganga rejuvenation
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