Kickapoo River at La Farge (Excerpt from SIR 2008-5235)
The Kickapoo River flows south through the community of La Farge in southern Vernon County (appendix 3). For the La Farge area, a relatively coarse 10-m resolution DEM was all that was available, and a correction to the modeled inundated area in downtown La Farge was made on the basis of first-hand experience of the flood from the Village Public Works director (Wayne Carpenter, written commun., 2008) (appendix 3B). The USGS streamgage on the Kickapoo River at La Farge peaked at a gage-height elevation of 797.32 ft. The nearest high-water mark was on a tree approximately 70 ft from the streamgage, at an elevation of 797.3 ft. The agreement between the elevations of the high-water-mark and flood-peak gage-height confirms that the difference between the modeled and corrected inundation areas was caused by the coarse resolution of the topography from the 10-m DEM data. Expected vertical accuracy of the DEM is on the order of feet instead of tenths of feet expected for the high-water marks.
Photo of State Highway 82, looking east, at downtown La Farge, June 8, 2008. Photo from Village of La Farge.
Appendix 3A. High-Water Mark Table (pdf) (excel) (shapefiles)
Appendix 3B. Flood-Peak Inundation Map (pdf) (shapefiles)
Appendix 3C. Flood-Depth Map (pdf) (grids)
Appendix 3D. Flood-Peak Water-Surface Profile (pdf)
Link to real-time streamgage 05408000 Kickapoo River at La Farge, Wis