Floodplain boundaries, high-water marks and study limits for flood-inundation maps near North Industry, Ohio
Dates
Publication Date
2019-10-10
Time Period
2019
Citation
Whitehead, M.T., 2019, Geospatial datasets and hydraulic model for flood-inundation maps of Nimishillen Creek near North Industry, Ohio: U.S. Geological Survey data release, https://doi.org/10.5066/P9WFOVN2.
Summary
Digital flood-inundation maps for an approximate 4-mile (mi) reach of Nimishillen Creek near North Industry, Ohio were created by the U.S. Geological Survey (USGS) in cooperation with the Muskingum Watershed Conservancy District and the Stark County Commissioners. The flood-inundation maps, which can be accessed through the USGS Flood Inundation Mapping Science Web site at http://water.usgs.gov/osw/flood_inundation/, depict estimates of the areal extent and depth of flooding corresponding to selected water levels (stages) at the USGS streamgage, Nimishillen Creek at North Industry (03118500). Near-real-time stages at these streamgages can be obtained on the internet from the USGS National Water Information System at http://waterdata.usgs.gov/ [...]
Summary
Digital flood-inundation maps for an approximate 4-mile (mi) reach of Nimishillen Creek near North Industry, Ohio were created by the U.S. Geological Survey (USGS) in cooperation with the Muskingum Watershed Conservancy District and the Stark County Commissioners. The flood-inundation maps, which can be accessed through the USGS Flood Inundation Mapping Science Web site at http://water.usgs.gov/osw/flood_inundation/, depict estimates of the areal extent and depth of flooding corresponding to selected water levels (stages) at the USGS streamgage, Nimishillen Creek at North Industry (03118500). Near-real-time stages at these streamgages can be obtained on the internet from the USGS National Water Information System at http://waterdata.usgs.gov/ or the National Weather Service (NWS) Advanced Hydrologic Prediction Service at http:/water.weather.gov/ahps/, which also forecasts flood hydrographs at this site. Flood profiles were computed for the stream reach by means of a one-dimensional step-backwater model. The model was calibrated to the current stage-discharge relation at the streamgage, water levels determined with stage sensors (pressure transducers) temporarily deployed along the stream reach, and documented high water marks from the flood of January 12, 2017. The hydraulic model was then used to compute seven water-surface profiles for flood stages at 1-foot intervals referenced to the streamgage datum and ranging from 8 to 14, which is from ‘Action Stage’ to above ‘Major Flood Stage’, as reported by the National Weather Service. The simulated water-surface profiles were then used in combination with a geographic information system digital elevation model derived from light detection and ranging (lidar) data to delineate the areas flooded at each water level. The availability of these maps, along with internet information regarding current stage from the USGS streamgage and forecasted high-flow stages from the NWS will provide emergency management personnel and residents with information that is critical for flood response activities such as evacuations and road closures, as well as for postflood recovery efforts.
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Purpose
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 (USACE), state and local emergency managers, the media, and the general public.
