Next Article in Journal
Assessment of Water Buffer Capacity of Two Morphometrically Different, Degraded, Urban Lakes
Next Article in Special Issue
Simulation of a Hydrostatic Pressure Machine with Caffa3d Solver: Numerical Model Characterization and Evaluation
Previous Article in Journal
Why Technologies Often Fail to Scale: Policy and Market Failures behind Limited Scaling of Alternate Wetting and Drying in Rice in Bangladesh
Previous Article in Special Issue
Transient-Flow Induced Compressed Air Energy Storage (TI-CAES) System towards New Energy Concept
Communication

Experimental Investigation of Erosion Characteristics of Fine-Grained Cohesive Sediments

1
National Water Research Institute, Burlington, ON L7R 4A6, Canada
2
Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON N2L 3G1, Canada
3
Sustainable Agriculture Sciences Department, Rothamsted Research, North Wyke, Okehampton, Devon EX20 2SB, UK
*
Author to whom correspondence should be addressed.
Water 2020, 12(5), 1511; https://doi.org/10.3390/w12051511
Received: 28 April 2020 / Revised: 21 May 2020 / Accepted: 22 May 2020 / Published: 25 May 2020
(This article belongs to the Special Issue Environmental Hydraulics Research)
In this short communication, the erosion process of the fine, cohesive sediment collected from the upper River Taw in South West England was studied in a rotating annular flume located in the National Water Research Institute in Burlington, Ontario, Canada. This study is part of a research project that is underway to model the transport of fine sediment and the associated nutrients in that river system. The erosion experimental data show that the critical shear stress for erosion of the upper River Taw sediment is about 0.09 Pa and it did not depend on the age of sediment deposit. The eroded sediment was transported in a flocculated form and the agent of flocculation for the upper River Taw sediment may be due to the presence of fibrils from microorganisms and organic material in the system. The experimental data were analysed using a curve fitting approach of Krone and a mathematical model of cohesive sediment transport in rotating circular flumes developed by Krishnappan. The modelled and measured data were in good agreement. An evaluation of the physical significance of Krone’s fitting coefficients is presented. Variability of the fitting coefficients as a function of bed shear stress and age of sediment deposit indicate the key role these two factors play in the erosion process of fluvial cohesive sediment. View Full-Text
Keywords: erosion; cohesive sediments; rotating circular flume; mathematical modelling; fitting coefficients; sediment deposition; flocculation; bed shear stress; consolidation erosion; cohesive sediments; rotating circular flume; mathematical modelling; fitting coefficients; sediment deposition; flocculation; bed shear stress; consolidation
Show Figures

Figure 1

MDPI and ACS Style

Gounder Krishnappan, B.; Stone, M.; Granger, S.J.; Upadhayay, H.R.; Tang, Q.; Zhang, Y.; Collins, A.L. Experimental Investigation of Erosion Characteristics of Fine-Grained Cohesive Sediments. Water 2020, 12, 1511. https://doi.org/10.3390/w12051511

AMA Style

Gounder Krishnappan B, Stone M, Granger SJ, Upadhayay HR, Tang Q, Zhang Y, Collins AL. Experimental Investigation of Erosion Characteristics of Fine-Grained Cohesive Sediments. Water. 2020; 12(5):1511. https://doi.org/10.3390/w12051511

Chicago/Turabian Style

Gounder Krishnappan, Bommanna, Mike Stone, Steven J. Granger, Hari R. Upadhayay, Qiang Tang, Yusheng Zhang, and Adrian L. Collins. 2020. "Experimental Investigation of Erosion Characteristics of Fine-Grained Cohesive Sediments" Water 12, no. 5: 1511. https://doi.org/10.3390/w12051511

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop