Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/35245
Title: Effect of seepage on sediment transport
Authors: Liu, Xiaoxie
Keywords: DRNTU::Engineering::Civil engineering::Water resources
Issue Date: 2010
Source: Liu, X. (2010). Effect of seepage on sediment transport. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: This study presents the experimental results and theoretical analyses of seepage effects on sediment transport. A total of 529 experiments grouped under four different series of tests were conducted in a laboratory flume with a permeable sediment boundary to investigate the effect of seepage, the length of the suction zone and time on bedload transport rate. Two different types of cohesionless sand particles with diameters = 0.9 mm and 0.48 mm were used in the study. Three dimensionless groups, viz. Einstein’s parameter Φ, Shields’ parameter without seepage τ*o and modified densimetric Froude number Ω are chosen to examine how seepage affects bedload transport rate. Eleven undisturbed flow conditions were tested, five under clear water and six in live-bed condition. No bedforms with significant height were observed during the experiments. The results show that an increase in suction rate causes an increase in shear velocity excess, which is defined as the difference between the bed and critical shear velocities, leading to an increase in bedload transport rate. The experimental data also show that for the same undisturbed flow conditions, the dimensionless bedload transport rate increases linearly (in semi-logarithmic scale) with increasing suction rates. The equations for predicting bedload transport rate under suction are derived empirically; the predicted results using these empirical equations compared well with measured data, with an accuracy of 20%. Published results from other researchers are used to compare with results obtained and inference drawn from the present study. The similarities and differences of these studies are highlighted.
URI: https://hdl.handle.net/10356/35245
DOI: 10.32657/10356/35245
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Theses

Files in This Item:
File Description SizeFormat 
LiuXiaoxie2010.pdfReport4.33 MBAdobe PDFThumbnail
View/Open

Page view(s) 20

476
Updated on May 13, 2021

Download(s) 5

507
Updated on May 13, 2021

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.