Geospatial datasets and hydraulic models of the Clear Fork Mohican River and Cedar Fork in Richland County, Ohio
Dates
Publication Date
2019-06-13
Time Period
2018
Citation
Ostheimer, C.J., 2019, Geospatial datasets and hydraulic models for the Clear Fork Mohican River and Cedar Fork in Richland County, Ohio: U.S. Geological Survey data release, https://doi.org/10.5066/P9NMXM5B.
Summary
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 [...]
Summary
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.
The initial target audience is the state and local agencies that must make emergency operational decisions during flooding events. However, since the graphics are easy to view, anyone with an interest during these events can make use of the maps, including the Federal Emergency Management Agency (FEMA), the U.S. Geological Survey (USGS), U.S Army Corps of Engineers (COE), state and local emergency managers, the media, and the general public.
