Search National Agricultural Library Digital Collections

NALDC Record Details:

Flow near a model spur dike with a fixed scoured bed

Permanent URL:
http://handle.nal.usda.gov/10113/58940
File:
Download [PDF File]
Abstract:
Three-dimensional flow velocities were measured using an acoustic Doppler velocimeter at a closely spaced grid over a fixed scoured bed with a submerged spur dike. Three-dimensional flow velocities were measured at 3484 positions around the trapezoidal shaped submerged model spur dike over a fixed scoured bed. General velocity distributions and detailed near field flow structures were revealed by the measurement. Clear differences were revealed between flow over fixed flat and scoured beds. Strong lateral flows were the dominant cause of the observed local scour. Shear stresses were higher for the scoured bed than in the flat bed case. Decreasing rates of scour as the scour hole developed were attributed to increases in critical shear stress in the scour holes caused by the increase in the length and magnitude of adverse slopes associated with the two main scour holes.
Author(s):
Roger Kuhnle , Carlos Alonso
Note:
USDA Scientist Submission
Source:
International Journal of Sediment Research 2013 v.28
Language:
English
Year:
2013
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.