Next Article in Journal
Detection of Helminth Ova in Wastewater Using Recombinase Polymerase Amplification Coupled to Lateral Flow Strips
Next Article in Special Issue
Seasonal Precipitation Variability and Gully Erosion in Southeastern USA
Previous Article in Journal
Groundwater Contribution to Sewer Network Baseflow in an Urban Catchment-Case Study of Pin Sec Catchment, Nantes, France
Previous Article in Special Issue
A Fuzzy Transformation of the Classic Stream Sediment Transport Formula of Yang
Open AccessArticle

A New Mass-Conservative, Two-Dimensional, Semi-Implicit Numerical Scheme for the Solution of the Navier-Stokes Equations in Gravel Bed Rivers with Erodible Fine Sediments

Faculty of Science and Technology, Free University of Bozen-Bolzano, Universitätsplatz - Piazza Università 5, 39100 Bozen-Bolzano, Italy
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Water 2020, 12(3), 690; https://doi.org/10.3390/w12030690
Received: 14 December 2019 / Revised: 15 February 2020 / Accepted: 18 February 2020 / Published: 3 March 2020
(This article belongs to the Special Issue Modeling of Soil Erosion and Sediment Transport)
The selective trapping and erosion of fine particles that occur in a gravel bed river have important consequences for its stream ecology, water quality, and overall sediment budgeting. This is particularly relevant in water bodies that experience periodic alternation between sediment supply-limited conditions and high sediment loads, such as downstream from a dam. While experimental efforts have been spent to investigate fine sediment erosion and transport in gravel bed rivers, a comprehensive overview of the leading processes is hampered by the difficulties in performing flow field measurements below the gravel crest level. In this work, a new two-dimensional, semi-implicit numerical scheme for the solution of the Navier-Stokes equations in the presence of deposited and erodible sediment is presented, and tested against analytical solutions and performing numerical tests. The scheme is mass-conservative, computationally efficient, and allows for a fine discretization of the computational domain. Overall, this makes the model suitable to appreciate small-scales phenomena such as inter-grain circulation cells, thus offering a valid alternative to evaluate the shear stress distribution, on which erosion and transport processes depend, compared to traditional experimental approaches. In this work, we present proof-of-concept of the proposed model, while future research will focus on its extension to a three-dimensional and parallelized version, and on its application to real case studies. View Full-Text
Keywords: sediment transport; sediment entrainment; clogging; colmation; numerical modeling sediment transport; sediment entrainment; clogging; colmation; numerical modeling
Show Figures

Figure 1

MDPI and ACS Style

Tavelli, M.; Piccolroaz, S.; Stradiotti, G.; Pisaturo, G.R.; Righetti, M. A New Mass-Conservative, Two-Dimensional, Semi-Implicit Numerical Scheme for the Solution of the Navier-Stokes Equations in Gravel Bed Rivers with Erodible Fine Sediments. Water 2020, 12, 690. https://doi.org/10.3390/w12030690

AMA Style

Tavelli M, Piccolroaz S, Stradiotti G, Pisaturo GR, Righetti M. A New Mass-Conservative, Two-Dimensional, Semi-Implicit Numerical Scheme for the Solution of the Navier-Stokes Equations in Gravel Bed Rivers with Erodible Fine Sediments. Water. 2020; 12(3):690. https://doi.org/10.3390/w12030690

Chicago/Turabian Style

Tavelli, Maurizio; Piccolroaz, Sebastiano; Stradiotti, Giulia; Pisaturo, Giuseppe R.; Righetti, Maurizio. 2020. "A New Mass-Conservative, Two-Dimensional, Semi-Implicit Numerical Scheme for the Solution of the Navier-Stokes Equations in Gravel Bed Rivers with Erodible Fine Sediments" Water 12, no. 3: 690. https://doi.org/10.3390/w12030690

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
Search more from Scilit
 
Search
Back to TopTop