Model experiments on mobile, paved gravel bed streams

Gary Parker, Sundararajan Dhamotharan, Heinz Stefan

Research output: Contribution to journalArticle

Abstract

Laboratory experiments which model streams with poorly sorted gravel beds at reduced scale reveal that pavement is a mobile bed phenomenon. It acts to decrease the inherent difference in mobility between large and small grains by overrepresenting the percentage of large grains exposed to the flow. Pavement can coexist with the motion of all available grain sizes because motion is sporadic, so that at any given time only a small percentage of surface grains are actually in motion. Particles in the immediate subpavement are only occasionally moved, and deeper particles are hardly ever moved. The experiments were conducted at constant discharges. They provide accurate quantitative models of two field streams in that they obey the same bedload law as field data. Both sediment feed and recirculating configurations were utilized. The only systematic difference between the two is in the behavior of the finer grains.

Original languageEnglish (US)
Pages (from-to)1395-1408
Number of pages14
JournalWater Resources Research
Volume18
Issue number5
DOIs
StatePublished - Oct 1982

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gravel bed stream
pavement
bedload
gravel
grain size
experiment
sediment
particle
laboratory experiment

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Model experiments on mobile, paved gravel bed streams. / Parker, Gary; Dhamotharan, Sundararajan; Stefan, Heinz.

In: Water Resources Research, Vol. 18, No. 5, 10.1982, p. 1395-1408.

Research output: Contribution to journalArticle

Parker, Gary ; Dhamotharan, Sundararajan ; Stefan, Heinz. / Model experiments on mobile, paved gravel bed streams. In: Water Resources Research. 1982 ; Vol. 18, No. 5. pp. 1395-1408.
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