Neosho River, Ottawa County, Okla. -- Provisional Inundation Areas Subject to Revision
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This pilot/preliminary web mapping application shows modeled, flood-inundated areas associated with various river and lake stage conditions. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. Although USGS intends to make this server available 24 hours a day, 7 days a week, timely delivery of data and products from this server through the Internet is not guaranteed. The USGS provides these maps “as-is” for a quick reference, emergency planning tool but assumes no legal liability or responsibility resulting from the use of this information.
Although the flood-inundation maps represent the boundaries of inundated areas with a distinct line, much uncertainty is associated with these maps. The flood boundaries shown were estimated based on water stages (water-surface elevations) and streamflows at selected USGS streamgages. They do not include the effects of tributary inflows (including Tar Creek) to the modeled stream reach. Water-surface elevations along the stream reach were estimated by steady-state hydraulic modeling, assuming unobstructed flow, and using streamflows and hydrologic conditions anticipated at the USGS gages on the Neosho River (07185000) and Grand Lake O' the Cherokees (07190000). Unique meteorological factors (timing and distribution of precipitation) may cause actual streamflows along the modeled reach to vary from those assumed during a flood, which may lead to deviations in the water-surface elevations and inundation boundaries shown. Additional areas may be flooded due to unanticipated conditions such as: changes in the streambed elevation or roughness, backwater into major tributaries along a main stem river, or backwater from localized debris or ice jams. The accuracy of the floodwater extent portrayed on these maps will vary with the accuracy of the digital elevation model used to simulate the land surface.
If this series of flood-inundation maps will be used in conjunction with National Weather Service (NWS) river forecasts, the user should be aware of additional uncertainties that may be inherent or factored into NWS forecast procedures. The NWS uses forecast models to estimate the quantity and timing of water flowing through selected stream reaches in the United States. These forecast models (1) estimate the amount of runoff generated by precipitation and snowmelt, (2) simulate the movement of floodwater as it proceeds downstream, and (3) predict the flow and stage (water-surface elevation) for the stream at a given location (AHPS forecast point) throughout the forecast period (every 6 hours and 3 to 5 days out in many locations). For more information on AHPS forecasts, please see: http://water.weather.gov/ahps/pcpn_and_river_forecasting.pdf
Neosho River near Commerce, OK
Stage, in feet above arbitrary gage datum
Click on the hydrograph to display the nearest-matching model scenario in the map
|NWS Neosho River Flood Categories (in feet):|
|Major Flood Stage:||24|
|Moderate Flood Stage:||18|
The U.S. Army Corps of Engineers maintains current and historic data on lake stage and storage at Grand Lake O' the Cherokees.
The target managed lake elevation is dependent on the time of year. [more]