Document Type
Thesis
Date of Degree
Spring 2011
Degree Name
MS (Master of Science)
Degree In
Civil and Environmental Engineering
First Advisor
Larry J. Weber
Second Advisor
Nathan C. Young
First Committee Member
Larry J Weber
Second Committee Member
Nathan C Young
Third Committee Member
Witold F Krajewski
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