Development of a high-resolution 1D/2D coupled flood simulation of Charles City, Iowa

Publication Year:
2011
Usage 2377
Downloads 2189
Abstract Views 188
Repository URL:
http://ir.uiowa.edu/etd/1032; https://ir.uiowa.edu/cgi/viewcontent.cgi?article=2417&context=etd
Author(s):
Moore, Matthew Roger
Publisher(s):
University of Iowa
Tags:
1D/2D coupled hydraulic model; Floods; Civil and Environmental Engineering
thesis / dissertation description
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.