Stream Bank Erosion

In Situ Flume Tests

K. Debnath, V. Nikora, A. Elliott

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A new technique for testing the erodibility of cohesive stream banks using an in situ flume is presented. The erosion rate is estimated from direct measurements of bed surface elevations by acoustic sensors. The sediment resuspension rate is obtained using data on sediment concentrations measured by optical backscatter sensors and from water samples. The bed-load contribution to the total erosion rate is evaluated from the conservation equation for sediments. Temporal patterns of erosion and resuspension rates are studied employing stepwise increments of bed-shear stress. The data show that bed load plays a significant role in cohesive bank erosion. The data analysis suggests that erosion and resuspension thresholds observed in experiments were very low or equal to zero. The data support the power type equation for the erosion and resuspension rates with bed-shear stress as the key factor. The data also highlights the potential importance of mud content and water content on erosion.
Original languageEnglish
Pages (from-to)256-264
Number of pages9
JournalJournal of Irrigation and Drainage Engineering
Volume133
Issue number3
DOIs
Publication statusPublished - Jun 2007

Fingerprint

bank erosion
resuspension
Erosion
erosion
sediments
shear stress
Water
bottom stress
bedload
erosion rate
Acoustics
erodibility
testing
Sediments
sediment
sensor
acoustics
data analysis
Shear stress
backscatter

Keywords

  • cohesive sediments
  • alluvial streams
  • bank erosion
  • bedload
  • field tests
  • flumes
  • in situ tests
  • mud/sand mixtures
  • fine sediment
  • shear-stress
  • resuspension
  • aggregation
  • erodibility
  • harbor
  • bay
  • bed

Cite this

Stream Bank Erosion : In Situ Flume Tests. / Debnath, K.; Nikora, V.; Elliott, A.

In: Journal of Irrigation and Drainage Engineering, Vol. 133, No. 3, 06.2007, p. 256-264.

Research output: Contribution to journalArticle

Debnath, K. ; Nikora, V. ; Elliott, A. / Stream Bank Erosion : In Situ Flume Tests. In: Journal of Irrigation and Drainage Engineering. 2007 ; Vol. 133, No. 3. pp. 256-264.
@article{1858ba3361f14d948d6f940ce3ff7a20,
title = "Stream Bank Erosion: In Situ Flume Tests",
abstract = "A new technique for testing the erodibility of cohesive stream banks using an in situ flume is presented. The erosion rate is estimated from direct measurements of bed surface elevations by acoustic sensors. The sediment resuspension rate is obtained using data on sediment concentrations measured by optical backscatter sensors and from water samples. The bed-load contribution to the total erosion rate is evaluated from the conservation equation for sediments. Temporal patterns of erosion and resuspension rates are studied employing stepwise increments of bed-shear stress. The data show that bed load plays a significant role in cohesive bank erosion. The data analysis suggests that erosion and resuspension thresholds observed in experiments were very low or equal to zero. The data support the power type equation for the erosion and resuspension rates with bed-shear stress as the key factor. The data also highlights the potential importance of mud content and water content on erosion.",
keywords = "cohesive sediments, alluvial streams, bank erosion, bedload, field tests, flumes, in situ tests, mud/sand mixtures, fine sediment, shear-stress, resuspension, aggregation, erodibility, harbor, bay, bed",
author = "K. Debnath and V. Nikora and A. Elliott",
year = "2007",
month = "6",
doi = "10.1061/(ASCE)0733-9437(2007)133:3(256)",
language = "English",
volume = "133",
pages = "256--264",
journal = "Journal of Irrigation and Drainage Engineering",
issn = "0733-9437",
publisher = "American Society of Civil Engineers (ASCE)",
number = "3",

}

TY - JOUR

T1 - Stream Bank Erosion

T2 - In Situ Flume Tests

AU - Debnath, K.

AU - Nikora, V.

AU - Elliott, A.

PY - 2007/6

Y1 - 2007/6

N2 - A new technique for testing the erodibility of cohesive stream banks using an in situ flume is presented. The erosion rate is estimated from direct measurements of bed surface elevations by acoustic sensors. The sediment resuspension rate is obtained using data on sediment concentrations measured by optical backscatter sensors and from water samples. The bed-load contribution to the total erosion rate is evaluated from the conservation equation for sediments. Temporal patterns of erosion and resuspension rates are studied employing stepwise increments of bed-shear stress. The data show that bed load plays a significant role in cohesive bank erosion. The data analysis suggests that erosion and resuspension thresholds observed in experiments were very low or equal to zero. The data support the power type equation for the erosion and resuspension rates with bed-shear stress as the key factor. The data also highlights the potential importance of mud content and water content on erosion.

AB - A new technique for testing the erodibility of cohesive stream banks using an in situ flume is presented. The erosion rate is estimated from direct measurements of bed surface elevations by acoustic sensors. The sediment resuspension rate is obtained using data on sediment concentrations measured by optical backscatter sensors and from water samples. The bed-load contribution to the total erosion rate is evaluated from the conservation equation for sediments. Temporal patterns of erosion and resuspension rates are studied employing stepwise increments of bed-shear stress. The data show that bed load plays a significant role in cohesive bank erosion. The data analysis suggests that erosion and resuspension thresholds observed in experiments were very low or equal to zero. The data support the power type equation for the erosion and resuspension rates with bed-shear stress as the key factor. The data also highlights the potential importance of mud content and water content on erosion.

KW - cohesive sediments

KW - alluvial streams

KW - bank erosion

KW - bedload

KW - field tests

KW - flumes

KW - in situ tests

KW - mud/sand mixtures

KW - fine sediment

KW - shear-stress

KW - resuspension

KW - aggregation

KW - erodibility

KW - harbor

KW - bay

KW - bed

U2 - 10.1061/(ASCE)0733-9437(2007)133:3(256)

DO - 10.1061/(ASCE)0733-9437(2007)133:3(256)

M3 - Article

VL - 133

SP - 256

EP - 264

JO - Journal of Irrigation and Drainage Engineering

JF - Journal of Irrigation and Drainage Engineering

SN - 0733-9437

IS - 3

ER -