Identification_Information: Citation: Citation_Information: Originator: Elizabeth A. Murphy Originator: David T. Soong Originator: Jennifer B. Sharpe Publication_Date: 2014MMDD Title: Revision to Ohio River Backwater Flood-Inundation Maps for the Saline and Wabash Rivers in Southern Illinois Geospatial_Data_Presentation_Form: vector digital data for map Series_Information: Series_Name: USGS Scientific Investigations Report Issue_Identification: SIR 5212 Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Online_Linkage: http://water.usgs.gov/osw/flood_inundation/ Online_Linkage: http://pubs.usgs.gov/sir/5212 Description: Abstract: Digital flood-inundation maps for the Saline and Wabash Rivers referenced to elevations on the Ohio River in southern Illinois were created by the U.S. Geological Survey (USGS). The inundation maps, accessible through the USGS Flood Inundation Mapping Science Web site at http://water.usgs.gov/osw/flood_inundation/, depict estimates of the areal extent of flooding corresponding to selected water levels (gage heights) at the USGS streamgage at Ohio River at Old Shawneetown, Illinois-Kentucky (station number 03381700). Current gage height and flow conditions at this USGS streamgage may be obtained on the Internet at http://waterdata.usgs.gov/usa/nwis/uv?03381700. In addition, this streamgage is incorporated into the Advanced Hydrologic Prediction Service (AHPS) flood warning system (http:/water.weather.gov/ahps/) by the National Weather Service (NWS). The NWS forecasts flood hydrographs at many places that are often co-located at USGS streamgages. That NWS forecasted peak-stage information, also shown on the Ohio River at Old Shawneetown inundation Web site, may be used in conjunction with the maps developed in this study to show predicted areas of flood inundation. In this revision, 18 water-surface elevations were mapped at 2-foot (ft) intervals referenced to the streamgage datum ranging from just above the NWS Action Stage (31 ft) to approximately the maximum historical gage height (65 ft). The elevations of the water surfaces were compared to a Digital Elevation Model (DEM) by using a Geographic Information System (GIS) in order to delineate the area flooded at each water level. These maps, along with information on the Internet regarding current gage heights from USGS streamgages and forecasted stream stages from the NWS, 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: The purpose of this study is to describe the development of a series of estimated flood-inundation maps for the Saline and Wabash Rivers based on gage heights on the Ohio River in Southern Illinois and to provide users with a library of flood-inundation maps that correspond to water levels referenced to the gage heights at the USGS streamgage on the Ohio River at Old Shawneetown, Illinois-Kentucky, ranging from 31 ft to 65 ft and to make these maps easy available to emergency workers and the public. Supplemental_Information: Shape files included in this metadata: Saline_IL.shp Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2014 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.633 East_Bounding_Coordinate: -87.98 North_Bounding_Coordinate: 37.93 South_Bounding_Coordinate: 37.52 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: flood Theme_Keyword: inundation Theme_Keyword: map Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Ohio River Place_Keyword: Wabash River Place_Keyword: Saline River Place_Keyword: Saline County Place_Keyword: Gallatin County Place_Keyword: Harrisburg Place_Keyword: Illinois Place_Keyword: United States Access_Constraints: No constraints have been placed on accessing this dataset. Use_Constraints: Users of these data should acknowledge the U.S. Geological Survey as the source of the data. Although the flood-inundation maps represent the boundaries of inundated areas with a distinct line, some uncertainty is associated with these maps. The flood boundaries shown were estimated on the basis of water-surface elevations at a selected USGS streamgage. Water-surface elevations along the stream reaches were estimated by assuming unobstructed flow and using hydrologic conditions anticipated at the USGS streamgage. Unique meteorological factors (timing and distribution of precipitation) may cause actual water-surface elevations along the mapped reach to vary from those assumed during a flood, which may lead to deviations in the inundation boundaries shown. Additional areas may be flooded due to unanticipated conditions such as changes in the streambed elevation or roughness, 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. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. 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. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Elizabeth A. Murphy Contact_Organization: US Geological Survey Contact_Address: Address_Type: mailing Address: 1201 W. University City: Urbana State_or_Province: Illinois Postal_Code: 61801 Country: USA Contact_Position: Hydrologist Contact_Voice_Telephone: (217) 328-9726 Contact_Facsimile_Telephone: (217) 328-9770 Contact_Electronic_Mail_Address: emurphy@usgs.gov Hours_of_Service: M-F 8am to 4:30 pm Native_Data_Set_Environment: Microsoft Windows 7 Service Pack 1; ESRI ArcCatalog 10.1 Cross_Reference: Citation_Information: Originator: US Geological Survey, Illinois Water Science Center Publication_Date: 2014 Title: Revision to Ohio River Backwater Flood-Inundation Maps for the Saline and Wabash Rivers in Southern Illinois Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Scientific Investigations Report Issue_Identification: SIR 5212 Publication_Information: Publication_Place: Reston, VA Publisher: US Geological Survey Online_Linkage: http://pubs.usgs.gov/sir/5212 Online_Linkage: http://water.usgs.gov/osw/flood_inundation/ Data_Quality_Information: Logical_Consistency_Report: Map elements were visually checked for errors by lead author and technical reviewers of the map. Completeness_Report: Complete; there are no planned revisions or updates at this time. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: USGS NED Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 10.0 meters Horizontal_Positional_Accuracy_Explanation: The USGS 1/3-Arc Second National Elevation Datasest has a horizontal resolution of approximately 10 meters. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: USGS NED Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Value: 2.44 meters Vertical_Positional_Accuracy_Explanation: The USGS 1/3-Arc Second National Elevation Datasest has a vertical resolution of approximately 2.44 meters. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: LiDAR data Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Value: 0.131 meters Vertical_Positional_Accuracy_Explanation: Consolidated Vertical Accuracy (CVA) Tested 0.13 meters consolidated vertical accuracy at the 95th percentile level, derived according to ASPRS Guidelines for Vertical Accuracy Reporting for LiDAR Data. Tested against the DEM. Based on the 95th percentile error in all land cover categories combined. Point SAL425, Easting 330329.2, Northing 4174548.77, Z-Error 0.130 meters Point SAL726, Easting 362494.64, Northing 4211211.16 Z-Error 0.130 meters Point SAL829, Easting 372597.02, Northing 4186455.88, Z-Error 0.140 meters Point SAL440, Easting 398905.87, Northing 4217263.17, Z-Error 0.140 meters Point SAL439, Easting 398881.12, Northing 4217309.25, Z-Error 0.18 meters Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey, Illinois Water Science Center Publication_Date: 2012 Title: Revision to Ohio River Backwater Flood-Inundation Maps for the Saline and Wabash Rivers in Southern Illinois Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2014 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Murphy and others (2012) Source_Contribution: GIS database structure source Process_Step: Process_Description: Surface created with ArcMap from water-surface elevations at the Ohio River at Old Shawneetown, Ill.-Ky., streamgage and LiDAR and NED land-surface data Source_Used_Citation_Abbreviation: Murphy and others, 2012 Process_Date: 20120821 Source_Produced_Citation_Abbreviation: GIS database structure source Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 4 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.99997500 Longitude_of_Central_Meridian: -88.33333333 Latitude_of_Projection_Origin: 36.66666667 False_Easting: 984250.000000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 5.000000 Ordinate_Resolution: 5.000000 Planar_Distance_Units: feet Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum 1988 Altitude_Resolution: 0.000100 Altitude_Distance_Units: feet Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Shape files included in this metadata: Saline_IL: has inundation surfaces corresponding to gage heights of 31 -65 ft at a 2-ft interval at USGS streamgage 03381700 on the Ohio River at Old Shawneetown, Illinois. Shapefile Attributes Attribute_Label:FID Attribute_Definition: Internal feature number. Sequential unique whole numbers that are automatically generated. Attribute_Label:Shape* Attribute_Definition: Feature geometry Attribute_Label:Id Attribute_Definition: Map number with which inundation level is associated Attribute_Label:ELEV Attribute_Definition: Elevation at the USGS streamgage 03381700 (Ohio River at Old Shawneetown, IL) that generates this flood inundation le referenced to NAVD 88 Attribute_Label:STAGE Attribute_Definition: Elevation at the USGS streamgage 03381700 (Ohio River at Old Shawneetown, IL) that generates this flood inundation level referenced to the gage height Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25286 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 1-(888)-ASK-USGS Contact_Electronic_Mail_Address: http://ask.usgs.gov Resource_Description: Downloadable Data Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. This database, identified as SIR 5212, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although the flood-inundation maps represent the boundaries of inundated areas with a distinct line, some uncertainty is associated with these maps. The flood boundaries shown were estimated based on water-surface elevations at a selected USGS streamgage. Water-surface elevations along the stream reaches were estimated assuming unobstructed flow and using hydrologic conditions anticipated at the USGS streamgage. Unique meteorological factors (timing and distribution of precipitation) may cause actual water-surface elevations along the mapped reach to vary from those assumed during a flood, which may lead to deviations in the inundation boundaries shown. Additional areas may be flooded due to unanticipated conditions such as: changes in the streambed elevation or roughness 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. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 0.112 Format_Name: ESRI SHP shapefile Format_Version_Number: 10.1 Format_Version_Date: 2010 File_Decompression_Technique: In Windows, use WinZip (http://www.winzip.com/) or other programs to extract the file. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sir/5212 Fees: none Metadata_Reference_Information: Metadata_Date: 20120821 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Elizabeth A. Murphy Contact_Organization: U.S. Geological Survey Contact_Position: Hydrologist Contact_Address: Address_Type: 1201 W. University Ave. City: Urbana State_or_Province: Illinois Postal_Code: 61801 Contact_Voice_Telephone: 217-328-9726 Contact_Facsimile_Telephone: 217-328-9770 Contact_Electronic_Mail_Address: emurphy@usgs.gov Hours_of_Service: M-F, 8:00am-4:30pm Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile