IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Numerical modelling of sediment transport in an ice covered river
Numerical modelling of sediment transport in an ice covered river
The transport of sediment and the associated chemical constituents originating from potential anthropogenic and natural
sources are becoming an issue of increasing importance in the lower reaches of the Athabasca River ecosystem in
northern Alberta, Canada. As a cold region river, the annual cycle of ice cover formation and breakup play a key role in
sediment transport in this river. This numerical modelling study investigates the transport of fine cohesive sediments in
the lower Athabasca River during both ice-covered and open-water periods. A one-dimensional (1D) river ice model is
used to predict the ice coverage and its effect on the flow characteristics. The results of the ice model are used to
investigate the effect of ice-cover on the sediment erosion, deposition and transport pattern within a ~200 km reach of the
lower Athabasca River. A two-dimensional (2D) hydrodynamic/sediment transport model is also applied for more detailed
simulations of lateral variations in specific regions. Results are validated and evaluated using available field
measurements. Model output is discussed in relation to their utility for understanding and assessing the implication of the
sediment dynamics on chemical contaminant fate and its effect on ecological indicators such as the benthic community.
Furthermore, results help to obtain a better understanding of the important effects of ice-cover on sediment transport in
cold region rivers.
File Size : 811,624 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 18/08/2015
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