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dislodge sediment. The archaeologist can also place overburden material directly into the mouth of the dredge. As the water dredge will remove particles held in suspension in the water, provided it is used correctly it will improve visibility in the immediate area of the excavation. Careful use of the water dredge ensures that artifacts can be recorded in
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In the hands of a trained archaeologist, the water dredge performs the same function as a wheelbarrow on land. It is used to carry away sediments, not to dig holes. The archaeologist dislodges the material using a trowel, brush or by making a fanning motion with the hand to cause a current to
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Using a water dredge or airlift, the underwater archaeologist has an advantage over terrestrial counterparts, as the spoil is removed without effort and without needing to be transported across other parts of the archaeological site.
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from the flow of pumped water causes suction at the mouth of the dredge. Water and sediment are sucked from the excavation site and released from the far end of the tube. The tube can be made of any rigid material such as
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Water eductors are also used by marine treasure hunters to suck sediments for filtering for buried artifacts. Using the water dredge to directly suck sediments means that archaeological information on context and
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system which are designed to remove soluble gases and particulate by inducing a gas flow using high pressure liquid focused into a
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being missed because of poor visibility, a trap may be used at the outlet so that the lifted sediment can be filtered.
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67:. The diameter of the tube depends on the power available from the pump and whether delicate work is required.
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It consists of a large bore straight tube to which is attached a hose pipe through which clean water is
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throat. Additionally, eductor scrubbers can be used for direct-contact condensation.
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Muckelroy. Cambridge University Press, 1978 pp 28–31 and pp49–50.
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to remove sediments from an underwater archaeological site.
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90:Where there is a possibility of small
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39:may be used for the same purpose.
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145:Nuestra Señora de la Concepción
16:Type of pump used in archeology
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149:National Geographic Magazine
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33:underwater archaeologists
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193:Methods in archaeology
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188:Maritime archaeology
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31:-based tool used by
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102:is not recorded.
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128:Aspirator (pump)
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73:context
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