Scientific Investigations Report 2007–5107
Potential flow characteristics of future flooding along a 4.8-mile reach of the Flint River in Albany, Georgia, were simulated using recent digital-elevation-model data and the U.S. Geological Survey finite-element surface-water modeling system for two-dimensional flow in the horizontal plane (FESWMS-2DH). Simulated inundated areas, in 1-foot (ft) increments, were created for water-surface altitudes at the Flint River at Albany streamgage (02352500) from 192.5-ft altitude with a flow of 123,000 cubic feet per second (ft3/s) to 179.5-ft altitude with a flow of 52,500 ft3/s. The model was calibrated to match actual floods during July 1994 and March 2005 and Federal Emergency Management Administration floodplain maps. Continuity checks of selected stream profiles indicate the area near the Oakridge Drive bridge had lower velocities than other areas of the Flint River, which contributed to a rise in the flood-surface profile. The modeled inundated areas were mapped onto monochrome orthophoto imagery for use in planning for future floods. As part of a cooperative effort, the U.S. Geological Survey, the City of Albany, and Dougherty County, Georgia, conducted this study.
First posted August 4, 2007
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Musser, J.W., and Dyar, T.R., 2007, Two-dimensional flood-inundation model of the Flint River at Albany, Georgia: U.S. Geological Survey Scientific Investigations Report 2007–5107, 49 p., http://pubs.usgs.gov/sir/2007/5107.
Two-Dimensional Flood-Inundation Model
Appendix A. Images showing simulated flood inundation and hazard scale at the Albany streamgage compared with Federal Emergency Management Agency’s Digital Flood Insurance Rate Maps for the Flint River in Albany, Georgia, 1998
Appendix B. Flood extent photographs for the Flint River in Albany, Georgia