World Environmental and Water Resources Congress 2019
Modeling Evolution of a Large Mining Pit in the Lower Mississippi River
Publication: World Environmental and Water Resources Congress 2019: Hydraulics, Waterways, and Water Distribution Systems Analysis
ABSTRACT
Excavation of sediment from alluvial channel beds are common for the purpose of navigation maintenance, flood control, civil construction, etc. The post-dredge evolution of the mining-pit as well as the continuous changing of local flow and sediment transport, however, are poorly understood. The study simulates the morphological change of a large (1.46 million m3) borrow pit mined on a lateral sandbar in the lower Mississippi River using a depth-averaged two-dimensional hydrodynamic and sediment transport model. The model is calibrated and verified against 2.5 year time-series of multibeam bathymetric surveys. Besides, the study examined the sensitivity of mining-pit evolution simulation to the variation of the non-equilibrium adaptation parameters. Study results provide an insight into appropriate selection of the adaptation parameters in order to close the non-equilibrium sediment transport formulas when modeling large anthropogenic disturbance within the geomorphic processes.
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Acknowledgments
The financial support from the National Key R&D Program of China (2017YFC0405203), and the National Natural Science Foundation of China (51779242, 41330751, 51509234, 51579230) is gratefully acknowledged.
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Published In
World Environmental and Water Resources Congress 2019: Hydraulics, Waterways, and Water Distribution Systems Analysis
Pages: 287 - 295
Editors: Gregory F. Scott and William Hamilton, Ph.D.
ISBN (Online): 978-0-7844-8235-3
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© 2019 American Society of Civil Engineers.
History
Published online: May 16, 2019
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