Geospatial datasets and hydraulic models of the Clear Fork Mohican River and Cedar Fork in Richland County, Ohio.

Digital flood-inundation maps for an 18.6-mile (mi) reach of the Clear Fork Mohican River (that extends approximately from 100 feet upstream from Gass Road near Lexington, Ohio to 700 feet downstream from Benedict Road in Butler , Ohio) and for a 5.9-mile (mi) reach of Cedar Fork (that extends from its confluence with Clear Fork Mohican River to Wirick Road/Richland County Line) were created by the U.S. Geological Survey (USGS) in cooperation with the Muskingum Watershed Conservancy District as part of a Federal Emergency Management Agency (FEMA) Flood Insurance Study (FIS). The flood-inundation maps show estimates of the areal extent corresponding to the 1% and 0.2% annual-exceedance probability floods. Flood profiles were computed for the stream reaches by means of the one-dimensional step-backwater model HEC-RAS. The Clear Fork Mohican River model was calibrated by using the current stage-discharge relation at the U.S. Geological Survey streamgage on Clear Fork Mohican River at Bellville, Ohio (station number 03131982). Also included are shapefiles of the streams centerlines, base-flood elevations, regulatory floodways, and base topography.