Acoustic measurement of suspended sediment concentration profiles in an oscillatory boundary layer

Francisco Pedocchi, Marcelo Horacio Garcia

Research output: Contribution to journalArticle

Abstract

The use of an Ultrasonic Velocity Profiler (UVP) to obtain phase-averaged velocity and turbulent Reynolds stress profiles inside an oscillatory boundary layer flow is described in detail and possible error sources are summarized. Since the instrument also reports the acoustic backscatter, a novel application of the same ultrasound profilers to obtain phase-averaged suspended sediment concentration profiles and the errors involved in this technique are carefully discussed. The experiments were performed in the Large Oscillatory Water-Sediment Tunnel (LOWST), which has been a recent addition to the experimental facilities of the Ven Te Chow Hydrosystems Laboratory at the University of Illinois at Urbana-Champaign. The results showed that for the selected transducer frequency and flow, the instrument ability to characterize turbulence is compromised by the presence of Doppler noise and the size of the sampling volume. Regarding the suspended sediment estimation, it was found that the calibration obtained using water samples yielded good results, allowing for the study of the suspended sediment evolution along the oscillation.

Original languageEnglish (US)
Pages (from-to)87-95
Number of pages9
JournalContinental Shelf Research
Volume46
DOIs
StatePublished - Sep 1 2012

Fingerprint

suspended sediment
acoustics
boundary layer
profiler
phase velocity
transducer
backscatter
oscillation
ultrasonics
calibration
tunnel
water
turbulence
sampling
sediments
sediment
experiment
methodology
laboratory
ultrasound

Keywords

  • Oscillatory flow
  • Suspended sediment
  • Ultrasonic Velocity Profiler

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Geology

Cite this

Acoustic measurement of suspended sediment concentration profiles in an oscillatory boundary layer. / Pedocchi, Francisco; Garcia, Marcelo Horacio.

In: Continental Shelf Research, Vol. 46, 01.09.2012, p. 87-95.

Research output: Contribution to journalArticle

@article{331ff14133f84edbb9c0372a436a9ca3,
title = "Acoustic measurement of suspended sediment concentration profiles in an oscillatory boundary layer",
abstract = "The use of an Ultrasonic Velocity Profiler (UVP) to obtain phase-averaged velocity and turbulent Reynolds stress profiles inside an oscillatory boundary layer flow is described in detail and possible error sources are summarized. Since the instrument also reports the acoustic backscatter, a novel application of the same ultrasound profilers to obtain phase-averaged suspended sediment concentration profiles and the errors involved in this technique are carefully discussed. The experiments were performed in the Large Oscillatory Water-Sediment Tunnel (LOWST), which has been a recent addition to the experimental facilities of the Ven Te Chow Hydrosystems Laboratory at the University of Illinois at Urbana-Champaign. The results showed that for the selected transducer frequency and flow, the instrument ability to characterize turbulence is compromised by the presence of Doppler noise and the size of the sampling volume. Regarding the suspended sediment estimation, it was found that the calibration obtained using water samples yielded good results, allowing for the study of the suspended sediment evolution along the oscillation.",
keywords = "Oscillatory flow, Suspended sediment, Ultrasonic Velocity Profiler",
author = "Francisco Pedocchi and Garcia, {Marcelo Horacio}",
year = "2012",
month = "9",
day = "1",
doi = "10.1016/j.csr.2011.05.013",
language = "English (US)",
volume = "46",
pages = "87--95",
journal = "Continental Shelf Research",
issn = "0278-4343",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Acoustic measurement of suspended sediment concentration profiles in an oscillatory boundary layer

AU - Pedocchi, Francisco

AU - Garcia, Marcelo Horacio

PY - 2012/9/1

Y1 - 2012/9/1

N2 - The use of an Ultrasonic Velocity Profiler (UVP) to obtain phase-averaged velocity and turbulent Reynolds stress profiles inside an oscillatory boundary layer flow is described in detail and possible error sources are summarized. Since the instrument also reports the acoustic backscatter, a novel application of the same ultrasound profilers to obtain phase-averaged suspended sediment concentration profiles and the errors involved in this technique are carefully discussed. The experiments were performed in the Large Oscillatory Water-Sediment Tunnel (LOWST), which has been a recent addition to the experimental facilities of the Ven Te Chow Hydrosystems Laboratory at the University of Illinois at Urbana-Champaign. The results showed that for the selected transducer frequency and flow, the instrument ability to characterize turbulence is compromised by the presence of Doppler noise and the size of the sampling volume. Regarding the suspended sediment estimation, it was found that the calibration obtained using water samples yielded good results, allowing for the study of the suspended sediment evolution along the oscillation.

AB - The use of an Ultrasonic Velocity Profiler (UVP) to obtain phase-averaged velocity and turbulent Reynolds stress profiles inside an oscillatory boundary layer flow is described in detail and possible error sources are summarized. Since the instrument also reports the acoustic backscatter, a novel application of the same ultrasound profilers to obtain phase-averaged suspended sediment concentration profiles and the errors involved in this technique are carefully discussed. The experiments were performed in the Large Oscillatory Water-Sediment Tunnel (LOWST), which has been a recent addition to the experimental facilities of the Ven Te Chow Hydrosystems Laboratory at the University of Illinois at Urbana-Champaign. The results showed that for the selected transducer frequency and flow, the instrument ability to characterize turbulence is compromised by the presence of Doppler noise and the size of the sampling volume. Regarding the suspended sediment estimation, it was found that the calibration obtained using water samples yielded good results, allowing for the study of the suspended sediment evolution along the oscillation.

KW - Oscillatory flow

KW - Suspended sediment

KW - Ultrasonic Velocity Profiler

UR - http://www.scopus.com/inward/record.url?scp=84865790959&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865790959&partnerID=8YFLogxK

U2 - 10.1016/j.csr.2011.05.013

DO - 10.1016/j.csr.2011.05.013

M3 - Article

AN - SCOPUS:84865790959

VL - 46

SP - 87

EP - 95

JO - Continental Shelf Research

JF - Continental Shelf Research

SN - 0278-4343

ER -