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Modeling Hydrodynamics and Sediment Transport at a River-Coastal Confluence

GUO, YONG
http://rave.ohiolink.edu/etdc/view?acc_num=osu1039036259

Abstract Details

2002, Doctor of Philosophy, Ohio State University, Civil Engineering.
With the Maumee River/Lake Erie confluence requiring continuous dredging of two permanent bed mounds to remain a viable harbor, the goal of this dissertation is to research the hydrodynamic patterns and sediment transport characteristics under different forcing conditions in the confluence, with the objective of seeking the origin and physics of the two mobile sediment humps in the navigation channel of the river. As an outcome, this dissertation should help provide guidance as to why, when, and how dredging should be done in the region. An integrated three dimensional, hydrodynamic, sediment transport, wave current bottom boundary layer, and wave model is applied to simulate the hydrodynamics and sediment transport. A curvilinear planform grid with 208 by 79 cells in the horizontal direction and 12 sigma layers in the vertical direction is used to cover the whole lake and the 11 km long dredged channel of the Maumee River. After analysis of the existing Lake Erie literature, 18 hydrodynamic and 14 sediment transport application cases are constructed, based on different combinations of the forcing functions on the lake and river. In addition to generating the Lake Erie circulation patterns often described in published literature by other researchers, the hydrodynamic modeling conducted in this dissertation also has obtained new insight on confluence physics. The analysis of the sediment simulation results shows that the hump closer to the Maumee Bay (hump 2) is mainly deposited and sustained by the river bottom sediment resuspension. The upstream hump (hump 1) is mainly deposited and maintained by the riverine sediment deposition. Under steady SW winds, the deposition at hump 1 is the strongest in spring, less so in summer, and weakest in fall; the deposition at hump 2 is in the reversed order. Under steady NE winds, the deposition at hump 1 is the strongest in fall, less so in summer, and weakest in spring; the deposition at hump 2 is in the reversed order.
Keith Bedford (Advisor)
441 p.
Engineering, Civil
Hydrodynamics, Sediment Transport, 3D Modeling, Wave Current Bottom; Boundary Layer, Maumee River, Lake Erie, Stratification, Dredging

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Citations

  • GUO, Y. (2002). Modeling Hydrodynamics and Sediment Transport at a River-Coastal Confluence [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1039036259

    APA Style (7th edition)

  • GUO, YONG. Modeling Hydrodynamics and Sediment Transport at a River-Coastal Confluence. 2002. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1039036259.

    MLA Style (8th edition)

  • GUO, YONG. "Modeling Hydrodynamics and Sediment Transport at a River-Coastal Confluence." Doctoral dissertation, Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1039036259

    Chicago Manual of Style (17th edition)

osu1039036259
2,017
© 2002, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.