Hydraulics and erosion in eroding rills

M. A. Nearing, L. D. Norton, D. A. Bulgakov, G. A. Larionov, L. T. West, Katerina M Dontsova

Research output: Contribution to journalArticle

279 Citations (Scopus)

Abstract

Rills often act as sediment sources and the dominant sediment and water transport mechanism for hillslopes. Six experiments were conducted on two soils and a uniform sand using three experimental methodologies. The results of this study challenge the assumption often used in hydrologic and erosion models that relationships derived for sheet flow or larger channel flow are applicable to actively eroding rills. Velocity did not vary with slope, and Reynolds number was not a consistent predictor of hydraulic friction. This result was due to interactions of slope gradient, flow rate, erosion, and the formation of rill roughness, bed structures, and head cuts. A relationship for rill flow velocities was proposed. Stream power was found to be a consistent and appropriate predictor for unit sediment load for the entire data set, while other hydraulic variables were not. The data for stream power and sediment load fit the form of a logistic curve (r2 = 0.93), which is promising relative to recently proposed erosion models which are based on probabilistic particle threshold theory.

Original languageEnglish (US)
Pages (from-to)865-876
Number of pages12
JournalWater Resources Research
Volume33
Issue number4
StatePublished - Apr 1997
Externally publishedYes

Fingerprint

Erosion
Sediments
fluid mechanics
Hydraulics
hydraulics
erosion
soil erosion models
sediments
rill
sediment
bed roughness
sheet flow
channel flow
roughness
Channel flow
hydrologic models
erosion rate
hillslope
friction
Reynolds number

ASJC Scopus subject areas

  • Aquatic Science
  • Environmental Science(all)
  • Environmental Chemistry
  • Water Science and Technology

Cite this

Nearing, M. A., Norton, L. D., Bulgakov, D. A., Larionov, G. A., West, L. T., & Dontsova, K. M. (1997). Hydraulics and erosion in eroding rills. Water Resources Research, 33(4), 865-876.

Hydraulics and erosion in eroding rills. / Nearing, M. A.; Norton, L. D.; Bulgakov, D. A.; Larionov, G. A.; West, L. T.; Dontsova, Katerina M.

In: Water Resources Research, Vol. 33, No. 4, 04.1997, p. 865-876.

Research output: Contribution to journalArticle

Nearing, MA, Norton, LD, Bulgakov, DA, Larionov, GA, West, LT & Dontsova, KM 1997, 'Hydraulics and erosion in eroding rills', Water Resources Research, vol. 33, no. 4, pp. 865-876.
Nearing MA, Norton LD, Bulgakov DA, Larionov GA, West LT, Dontsova KM. Hydraulics and erosion in eroding rills. Water Resources Research. 1997 Apr;33(4):865-876.
Nearing, M. A. ; Norton, L. D. ; Bulgakov, D. A. ; Larionov, G. A. ; West, L. T. ; Dontsova, Katerina M. / Hydraulics and erosion in eroding rills. In: Water Resources Research. 1997 ; Vol. 33, No. 4. pp. 865-876.
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