Analytical model for the suspended sediment concentration in the ice-covered alluvial channels

View/ Open
Accepted manuscript (2.223Mb)
Download
Publication date
2021-062021-06
Keyword
Suspended sediment concentrationIce-covered channel
Analytical model
Modified sediment fall velocity
Rights
© 2021 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.Peer-Reviewed
YesOpen Access status
GreenAccepted for publication
2021-04-12
Metadata
Show full item recordAbstract
Ice cover formed on an alluvial channel can significantly alter the flow characteristics, such as the vertical distributions of streamwise velocity and shear stress, and hence the water and sediment transport process. The vertical profile of the suspended sediment concentration in the ice-covered alluvial channels with steady uniform flows is investigated in this study. To calculate the suspended sediment concentration, we are based on the Schmidt O’Brien equation and deduce an analytical model that employs an existing eddy viscosity model and a modified formula of the sediment fall velocity considering the common effects of the upper and lower boundaries. The proposed analytical model is then validated by using available experimental data reported in the literature. The predicted accuracy of the proposed model is evaluated through error statistics by comparing to previous modeled results. The relative concentration profiles of the suspended sediment are subsequently simulated by applying the validated analytical model with different characteristic parameters. Results show that the relative concentration decreases with the increase of both the ice cover roughness and the sediment fall velocity. The uniformity of the relative concentration distribution is closely related to the value of the proportionality parameter σ, revealing the physical mechanism that the more prominent the turbulent diffusion effect is, the more uniform the relative concentration profile is.Version
Accepted manuscriptCitation
Wang F, Huai W and Guo Y (2021) Analytical model for the suspended sediment concentration in the ice-covered alluvial channels. Journal of Hydrology. 597: 126338.Link to Version of Record
https://doi.org/10.1016/j.jhydrol.2021.126338Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1016/j.jhydrol.2021.126338