Identification_Information: Citation: Citation_Information: Originator: US Geological Survey, Mississippi Water Science Center Publication_Date: Unknown Publication_Time: Unknown Title: HattiesburgMS Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: Scientific Investigation Map Issue_Identification: SIM 3228 Publication_Information: Publication_Place: Reston, VA Publisher: US Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3228 Larger_Work_Citation: Citation_Information: Originator: U.S. Geological Survey, Mississippi Water Science Center Publication_Date: 2012 Title: Flood-Inundation Maps for the Leaf River at Hattiesburg, Mississippi Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: SIM 3228 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Storm, J.B., 2012, Flood-Inundation Maps for the Leaf River at Hattiesburg, Mississippi: U.S. Geological Survey Scientific Investigations Map 3228, 8 p. Description: Abstract: Digital flood-inundation maps for a 1.7-mile reach of the Leaf River that extends from U.S. Highway 11 to South Hardy – East Main Street at Hattiesburg, Mississippi, were created by the U.S. Geological Survey (USGS) in cooperation with the City of Hattiesburg, City of Petal, Forrest County, Mississippi Emergency Management Agency, Mississippi Department of Homeland Security, and the Emergency Management District. The 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 at Leaf River at Hattiesburg, MS (sta. no. 02473000). Current conditions at the USGS streamgage may be obtained on the Internet. In addition, the information has been provided to the National Weather Service (NWS) for incorporation into their Advanced Hydrologic Prediction Service (AHPS) flood warning system (http:/water.weather.gov/ahps/). The NWS forecasts flood hydrographs at many places that are often collocated at USGS streamgages. The forecasted peak-stage information, also available on the Internet, may be used in conjunction with the maps developed in this study to show predicted areas of flood inundation. In this study, flood profiles were computed for the stream reach by means of a one-dimensional step-backwater model. The model was calibrated using the most current stage-discharge relations at the 02473000 Leaf River at Hattiesburg, MS gage and documented high-water marks from historical and recent floods. The hydraulic model was then used to simulate 13 water-surface profiles for flood stages at 1-ft intervals referenced to the streamgage datum and ranging from bankfull to approximately the highest recorded water level at the streamgage. The simulated water-surface profiles were then combined with a geographic information system digital elevation model (derived from Light Detection and Ranging (LiDAR) data) in order to delineate the area flooded at each profile. A flood inundation map was generated for each water-surface profile ( 13 maps in all ) so that for any given flood stage users will be able to view the estimated area of inundation. The availability of these maps along with current stage 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: This dataset was created to support the development of flood inundation maps for a reach of the Leaf River at Hattiesburg, MS. Supplemental_Information: Flood-inundation maps were created for USGS streamgage 02473000 Leaf River at Hattiesburg, MS, which is also a NWS flood-forecast point. The maps were created in a GIS by combining the water-surface profiles and digital elevation model data. The digital elevation model (DEM) data were derived from LiDAR data with a 9.84-ft horizontal resolution and a 0.6-ft vertical accuracy. Estimated flood-inundation boundaries for each simulated profile were developed with HEC-GeoRAS software. HEC-GeoRAS is a set of procedures, tools, and utilities for processing geospatial data iin ArcGIS by using a graphical user interface. The interface allows the preparation of geometric data for import into HEC-RAS and processes simulation results exported from HEC-RAS. USGS personnel then modified the HEC-GeoRAS results to ensure a hydraulically reasonable transition of the boundary between modeled cross sections relative to the contour data for the land surface. The maps show estimated flood-inundated areas overlaid on high-resolution, geo-referenced, aerial photographs of the study area for each of the water-surface profiles that were generated by the hydraulic model. For more information on data processing and checking procedures, see the full report at http://pubs.usgs.gov/sim/3228 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: unknown Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -89.308600 East_Bounding_Coordinate: -89.258023 North_Bounding_Coordinate: 31.349960 South_Bounding_Coordinate: 31.316765 Keywords: 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 Place: Place_Keyword_Thesaurus: Board of Geographic Names Place_Keyword: Hattiesburg Place_Keyword: Petal Place_Keyword: Mississippi Place_Keyword: Leaf River Place_Keyword: Bouie River Place_Keyword: Gordon Creek Place_Keyword: Forrest County Place_Keyword: United States Place_Keyword: USA Access_Constraints: None. This dataset is provided by USGS as a public service. Use_Constraints: Uncertainties and Limitations for Use of Flood-Inundation Maps 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 stages (water-surface elevations) and streamflows at selected USGS streamgages. Water-surface elevations along the stream reaches were estimated by steady-state hydraulic modeling, assuming unobstructed flow, and using streamflows and hydrologic conditions anticipated at the USGS streamgage. The hydraulic model reflects the land-cover characteristics and any bridge, dam, levee, or other hydraulic structures existing as of December 2011. 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. 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. Additional uncertainties and limitations pertinent to this study are described in the document accompanying this set of flood inundation map plates. 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: US Geological Survey, Mississippi Water Science Center Contact_Address: Address_Type: mailing and physical address Address: 308 South Airport Road City: Jackson State_or_Province: Mississippi Postal_Code: 39208 Country: USA Contact_Voice_Telephone: 601-933-2900 Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000 Cross_Reference: Citation_Information: Originator: US Geological Survey, Mississippi Water Science Center Publication_Date: 2012 Publication_Time: Unknown Title: Flood-Inundation Maps for the Leaf River at Hattiesburg, Mississippi Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: SIM 3228 Publication_Information: Publication_Place: Reston, VA Publisher: US Geological Survey Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attributes for water surface elevation were input from the HEC-RAS model output data table. Peak Flow input data for the HEC-RAS model were obtained from the most current stage-discharge relation at the USGS streamgage 02473000 Leaf River at Hattiesburg, MS. Logical_Consistency_Report: There are no unclosed polygons or intersections without nodes. The ArcGIS geodatabase topology tools were used to make corrections using rules including no gaps, no duplicate lines with the same beginning and ending nodes. Completeness_Report: This data set is complete. Model is to be extended further upstream to include major tributary. This will not have an effect on the current data set. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Used cross-section data points from surveyed data, accurate to the datum of the survey. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Used cross-section data points from surveyed data, accurate to the datum of the survey. Vertical accuracy to the input Lidar DEM dataset. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: US Geological Survey, Mississippi Water Science Center Publication_Date: 2012 Title: Flood-Inundation Maps for the Leaf River at Hattiesburg, MS Type_of_Source_Media: online Source_Time_Period_of_Content: Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Storm, J.B. (2012) Source_Contribution: Numeric hydraulic model was used to compute water surface profiles at selected elevations along mapped reach. The water surface profiles were then used to generate the inundation map boundaries. Process_Step: Process_Description: Flood-inundation maps were created for USGS streamgage 02473000 Leaf River at Hattiesburg, MS, which is also a NWS flood-forecast point. The maps were created in a GIS by combining the water-surface profiles and digital elevation model data. The digital elevation model (DEM) data were derived from LiDAR data with 9.84-ft horizontal resolution and a vertical accuracy of 0.6-ft. The DEM was re-sampled to a 10-ft cell size. Estimated flood-inundation boundaries for each simulated profile were developed with HEC-GeoRAS software. HEC-GeoRAS is a set of procedures, tools, and utilities for processing geospatial data in ArcGIS by using a graphical user interface. The interface allows the preparation of geometric data for import into HEC-RAS and processes simulation results exported from HEC-RAS. The maps show estimated flood-inundated areas overlaid on high-resolution, geo-referenced, aerial photographs of the study area for each of the water-surface profiles that were generated by the hydraulic model. For more information on data processing and checking procedures, see the full report at http://pubs.usgs.gov/sim/3228. Process_Date: MM/DD/YY Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 1430 Column_Count: 1861 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Mercator_Auxiliary_Sphere Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 3.025335 Ordinate_Resolution: 3.025335 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.000001 Altitude_Distance_Units: feet Altitude_Encoding_Method: Attribute values Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: http://answers.usgs.gov Contact_Instructions: Contact via email Resource_Description: Downloadable Data Distribution_Liability: This database, identified as SIM3228, 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 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 porposes, nor shall the act of distribution constitue 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. Any use of trade, product, or firm names is for descriptive proposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than persoanl use must be secured from the copyright owner. This coverage may be redistributed if it is not edited and is properly referenced. 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. Uncertainties and Limitations for Use of Flood-Inundation Maps: 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 stages (water-surface elevations) and streamflows at selected USGS streamgages. Water-surface elevations along the stream reaches were estimated by steady-state hydraulic modeling, assuming unobstructed flow, and using streamflows and hydrologic conditions anticipated at the USGS streamgage(s). The hydraulic model reflects the land-cover characteristics and any bridge, dam, levee, or other hydraulic structures existing as of December 2011. 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. 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. Additional uncertainties and limitations pertinent to this study are described in the document accompanying this set of flood inundation map plates. 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 11.233 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://water.usgs.gov/osw/flood_inundation/ Technical_Prerequisites: Data are supplied in ArcGIS shapefile format. Format compatibility is the user's responsibility. Metadata_Reference_Information: Metadata_Date: 20120420 Metadata_Review_Date: YYYYMMDD Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: US Geological Survey Contact_Position: ASK USGS - Water Webserver Team Contact_Address: Address_Type: mailing address Address: 507 National Center City: Reston State_or_Province: Virginia Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 1-888-275-8747 (1-888-ASK-USGS) Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile