Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey, Nebraska Water Science Center Publication_Date: 2016 Title: Flood-Inundation Maps for a 12.5 mile reach of Big Papillion Creek for the USGS streamgage Big Papillion Creek at Fort Street at Omaha, Nebraska Geospatial_Data_Presentation_Form: Raster Digital Data Set Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Larger_Work_Citation: Citation_Information: Originator: US Geological Survey, Nebraska Water Science Center Publication_Date: 2016 Title: Flood-Inundation Maps for a 12.5 mile reach of Big Papillion Creek for the USGS streamgage Big Papillion Creek at Fort Street at Omaha, Nebraska Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Scientific Investigations Report Issue_Identification: 2015-5152 Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Other_Citation_Details: Strauch, K.R., Dietsch, B.J., and Anderson, K.J., 2016, Flood-inundation maps for a 12.5-mile reach of Big Papillion Creek at Omaha, Nebraska: U.S. Geological Survey Scientific Investigations Report 2015–5152, 11 p., http://dx.doi.org/10.3133/sir20155152. Online_Linkage: http://dx.doi.org/10.3133/sir20155152 Online_Linkage: Data sets are available at http://pubs.usgs.gov/sir/2015/5152/downloads/ Online_Linkage: Report is available at http://dx.doi.org/10.3133/sir20155152 Description: Abstract: Digital flood-inundation maps for a 12.5-mile reach of the Big Papillion Creek from 0.6 miles upstream from the State Street Bridge to the 72nd street bridge that crosses the Big Papillion Creek, were created by the U.S. Geological Survey (USGS) in cooperation with the Papio-Missiouri River Natural Resources District. 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 on the Big Papillion Creek at Fort Street at Omaha, Nebraska (station number 06610732). Near-real-time stages at this streamgage may be obtained on the Internet from the USGS National Water Information System at http://waterdata.usgs.gov/ or the National Weather Service 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 by using the current (2015) stage-discharge relation at the Big Papillion Creek at Fort Street at Omaha, Nebraska, and the Big Papillion Creek at Q Street streamgages. The hydraulic model was then used to computer 15 water-surface profiles for flood stages at 1-foot (ft) intervals referenced to the streamgage datum and ranging from 18 ft or near bankfull to 32 ft, which exceeds the “major flood stage” as defined by the National Weather Service. The simulated water-surface profiles were then combined with a Geographic Information System digital elevation model (derived from light detection and ranging [lidar] data having a 1.2-ft vertical accuracy and 3.28-ft horizontal resolution) to delineate the area 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 National Weather Service, 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 post flood recovery efforts. Purpose: This dataset was created to support the development of flood inundation maps for a reach of the Big Papillion Creek in Omaha, Nebraska. Supplemental_Information: A GIS application was used to produce a plane representing the flood-peak water surface. The application duplicates the water-surface-elevation data from cross-section points across the flood plain perpendicular to the direction of the flood flow. Elevations between water-surface points on the cross-sections are proportional interpolations of the water-surface-elevation data and were positioned to generate a flood surface sloping with the water flow. A raster surface was created with the data points using a spline interpolation method, forming the estimated flood surface. A flood-depth grid was made by subtracting the DEM from the flood surface. The flood-peak inundation areas are available in a GIS format, polyline shapefile, that provides extent of the flood peak for each stage level. This format allows the GIS data to be overlain on maps and aerial photographs, and to be used for various GIS applications, such as FEMA's Hazards U.S. Multi-Hazards (HAZUS-MH) program (Federal Emergency Management Agency, 2010b) to estimate flood damages. For more information on data processing and checking procedures, see the full report at http://dx.doi.org/10.3133/sir20155152 Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in ArcGIS format, this metadata file may include some ArcGIS-specific terminology. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20150610 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -96.146465 East_Bounding_Coordinate: -96.015999 North_Bounding_Coordinate: 41.344487 South_Bounding_Coordinate: 41.204074 Keywords: Place: Place_Keyword_Thesaurus: none Place_Keyword: Omaha Place_Keyword: Nebraska Place_Keyword: Big Papillion Creek Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: flood Theme_Keyword: river/stream Theme_Keyword: flood-inundation maps Theme_Keyword: high-water marks Theme_Keyword: flooded area Theme_Keyword: geospatial analysis Access_Constraints: None. This dataset is provided by USGS as a public service. Use_Constraints: Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. The flood boundaries shown were estimated based on water stages/streamflows at the USGS streamflow-gaging station 06610732, Big Papillion Creek at Fort Street at Omaha, Nebraska, steady-state hydraulic modeling (assuming unobstructed flow), and a digital elevation model. The hydraulic model reflects the land-cover characteristics and any bridge, dam, levee, or other hydraulic structures existing on June, 2015. Unique meteorological factors (timing and distribution of storm) could cause actual streamflows along the modeled reach to vary from those assumed during a flood, which may lead to deviations from the water surface elevations and inundation boundaries shown here. Additional areas may be flooded due to unanticipated backwater from major tributaries along the main stem or from localized debris- or ice-jams. 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, seven 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. 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 which may be inherent or factored into NWS forecast procedures. The NWS uses river forecast models to estimate the quantity and timing of water flowing through selected river reaches in the United States. These forecast models (1) estimate the amount of runoff generated by a precipitation event, (2) compute how the water will move downstream, and (3) predict the flow and stage (water surface elevation) for the river at a given location (AHPS forecast point) throughout the forecast period (every six 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 Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Midwest Region Contact_Person: Kellan R Strauch Contact_Position: Hydrologist Contact_Address: Address_Type: mailing address City: Lincoln State_or_Province: NE Postal_Code: 68512-1271 Country: US Address: 5231 South 19th Contact_Voice_Telephone: 402-328-4181 Contact_Facsimile_Telephone: 402-328-4101 Contact_Electronic_Mail_Address: kstrauch@usgs.gov Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.1 (Build 3035) Service Pack 1 (Build 3143) Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attributes for water-surface elevation were input from the HEC-RAS model output data table. Flow input data for the HEC-RAS model were obtained from stage-discharge relation at the USGS streamgage 06610732 Big Papillion Creek at Fort Street at Omaha, Nebraska. Data published and available at http://pubs.usgs.gov/sir/XXXX/XXXX Logical_Consistency_Report: There are no unclosed polygons or intersections without nodes. Completeness_Report: This dataset is complete; there are no planned revisions or updates at this time. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Used cross-section data points from surveyed data, accurate to the datum of the survey. Flood inundation extent was manually checked by sampling the digital elevation model (DEM) adjacent to high water marks. This check was done to verify that DEM elevations greater than the high-water mark were not in the flood inundation polygon and elevations less than the high water mark were within the flood inundation polygon. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Used cross-section data points from surveyed data, accurate to the datum of the survey. Flood inundation extent was manually checked by sampling the digital elevation model (DEM) adjacent to high water marks. This check was done to verify that DEM elevations greater than the high-water mark were not in the flood inundation polygon and elevations less than the high water mark were within the flood inundation polygon.Vertical accuracy to the input Lidar DEM dataset. Lineage: Process_Step: Process_Date: 20150615 Process_Description: Metadata imported. Process_Step: Process_Description: A GIS application was used to produce a plane representing the flood-peak water surface. The application duplicates the water-surface-elevation data from cross-section points of the hydraulic model across the flood plain perpendicular to the direction of the flood flow. Elevations between water-surface points on the cross-sections are proportional interpolations of the water-surface-elevation data and were positioned to generate a flood surface sloping with the water flow. A raster surface was created with the data points using a spline interpolation method, forming the estimated flood surface. A flood-depth grid was made by subtracting the DEM from the flood surface raster. Process_Date: 20150410 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 2446 Column_Count: 2395 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: State Plane Coordinate System 1983 State_Plane_Coordinate_System: SPCS_Zone_Identifier: 2600 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9999666666666667 False_Easting: 1640416.666666667 False_Northing: 0 Longitude_of_Central_Meridian: -100.0 Latitude_of_Projection_Origin: 39.83333333333334 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 6.561667 Ordinate_Resolution: 6.561667 Planar_Distance_Units: Foot_US Geodetic_Model: Horizontal_Datum_Name: D_North_American_1983 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Attribute Table Entity_Type_Definition: Table containing attribute information associated with the data set. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: Value Attribute_Definition: Estimated Depth of Water Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 37.30 Attribute_Units_of_Measure: Feet Overview_Description: Entity_and_Attribute_Overview: Each entity corresponds to an estimated flood extent area for stream stages 18-32 feet at the USGS streamgage 06610732, Big Papillion Creek at Fort Street at Omaha, Nebr. The attributes represent the USGS station ID, USGS stage height associated with the area, and NAVD88 elevation that correlates with the stage. Entity_and_Attribute_Detail_Citation: Strauch, K.R., Dietsch, B.J., and Anderson, K.J., 2016, Flood-inundation maps for a 12.5-mile reach of Big Papillion Creek at Omaha, Nebraska: U.S. Geological Survey Scientific Investigations Report 2015–5152, 11 p., http://dx.doi.org/10.3133/sir20155152. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Midwest Region Contact_Person: Kellan R Strauch Contact_Position: Hydrologist Contact_Address: Address_Type: mailing address City: Lincoln State_or_Province: NE Postal_Code: 68512-1271 Country: US Address: 5231 South 19th Contact_Voice_Telephone: 402-328-4181 Contact_Facsimile_Telephone: 402-328-4101 Contact_Electronic_Mail_Address: kstrauch@usgs.gov Distribution_Liability: Distributor assumes no liability for misuse of data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Raster Digital Data Set Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://water.usgs.gov/osw/flood_inundation/ Fees: None. No fees are applicable for obtaining the data set Metadata_Reference_Information: Metadata_Date: 20141216 Metadata_Review_Date: 20150826 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Midwest Region Contact_Person: Kellan R Strauch Contact_Position: Hydrologist Contact_Address: Address_Type: mailing address City: Lincoln State_or_Province: NE Postal_Code: 68512-1271 Country: US Address: 5231 South 19th Contact_Voice_Telephone: 402-328-4181 Contact_Facsimile_Telephone: 402-328-4101 Contact_Electronic_Mail_Address: kstrauch@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Profile_Name: ESRI Metadata Profile