DOI

10.17077/etd.ljnvksd4

Document Type

Thesis

Date of Degree

Spring 2011

Degree Name

MS (Master of Science)

Degree In

Civil and Environmental Engineering

First Advisor

Weber, Larry J

Second Advisor

Young, Nathan C

First Committee Member

Weber, Larry J

Second Committee Member

Young, Nathan C

Third Committee Member

Krajewski, Witold F

Abstract

The development of a high-resolution coupled one-dimensional/two-dimensional hydrodynamic model of Charles City, Iowa is presented in this study as part of a larger Iowa Flood Center initiative to create a library of steady inundation maps for communities in Iowa which have a high risk of flooding. Channel geometry from bathymetric surveys and surface topography from LiDAR were combined to create the digital elevation model (DEM) used in numerical simulations. Coupled one- and two-dimensional models were used to simulate flood events; the river channel and structures were modeled one-dimensionally, and the floodplain was modeled two-dimensionally. Spatially distributed roughness parameters were estimated using the 2001 National Land Cover Dataset. Simulations were performed at a number of mesh resolutions, and the results were used to investigate the effectiveness of re-sampling simulation results using higher- resolution DEMs. The effect of removing buildings from the computational mesh was also investigated. During 2011, the stream channel geometry is being changed as part of a recreational park in downtown Charles City. After incorporating the planned changes to the stream channel, the model was used to create a library of steady inundation maps which are available on the Iowa Flood Center website.

Keywords

1D/2D coupled hydraulic model, Floods

Pages

ix, 74 pages

Bibliography

Includes bibliographical references (pages 72-74).

Copyright

Copyright 2011 Matthew Moore

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