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Hjulström effect

A Dictionary of Earth Sciences | 1999 | | Copyright

Hjulström effect The contrast between the flow velocity at which a fine-grained cohesive sediment, may be deposited and that at which it will be eroded. F. Hjulström published an important diagram which plots the relationship between grain size and velocity for erosion, transportation, deposition, and settling velocity. One of the many important consequences of these relationships is that although fine-grained cohesive sediments (fine silt and clay) will be deposited only if flow velocities are very low, a very high velocity is required to erode the same sediment, once deposited. This is because of the cohesive nature of the sediment, which makes silt and clay more difficult to erode than pebbly sediment.

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AILSA ALLABY and MICHAEL ALLABY. "Hjulström effect." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Hjulström effect." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O13-Hjulstrmeffect.html

AILSA ALLABY and MICHAEL ALLABY. "Hjulström effect." A Dictionary of Earth Sciences. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Hjulstrmeffect.html

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Hjulstrom effect

A Dictionary of Ecology | 2004 | | Copyright

Hjulstrom effect The contrast between the flow velocity at which a fine-grained, cohesive sediment may be deposited and that at which it will be eroded. Although fine-grained cohesive sediments (fine silt and clay) will be deposited only if flow velocities are very low, a very high velocity is required to erode the same sediment, once deposited. This is because of the cohesive nature of the sediment, which makes silt and clay more difficult to erode than pebbly sediment.

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MICHAEL ALLABY. "Hjulstrom effect." A Dictionary of Ecology. 2004. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Hjulstrom effect." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O14-Hjulstromeffect.html

MICHAEL ALLABY. "Hjulstrom effect." A Dictionary of Ecology. 2004. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-Hjulstromeffect.html

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