Skip to main content
Select Source:

bed roughness

bed roughness The surface relief developed at the base of a flowing fluid, comprising bedforms (form roughness), and particles projecting from the sediment carpet (grain roughness). ‘Bed roughness’ is the quantifiable factor which expresses the frictional effect that the bed exerts on the flow. Surfaces whose bed-roughness elements do not project through the viscous sub-layer at the base of the flow are said to be smooth. Surfaces whose bed-roughness elements project through the sub-layer are said to be rough.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"bed roughness." A Dictionary of Earth Sciences. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"bed roughness." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bed-roughness

"bed roughness." A Dictionary of Earth Sciences. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bed-roughness

bed roughness

bed roughness The surface relief developed at the base of a flowing fluid, comprising bedforms (form roughness) and particles projecting from the sediment carpet (grain roughness). Bed roughness is the quantifiable factor which expresses the frictional effect that the bed exerts on the flow. Surfaces whose bed-roughness elements do not project through the viscous sub-layer at the base of the flow are said to be smooth. Surfaces whose bed-roughness elements project through the sublayer are said to be rough.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"bed roughness." A Dictionary of Ecology. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"bed roughness." A Dictionary of Ecology. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bed-roughness-0

"bed roughness." A Dictionary of Ecology. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bed-roughness-0