Development of Flood-Inundation Maps for the West Branch Susquehanna River near the Borough of Jersey Shore, Lycoming County, Pennsylvania: jshPA_01 (depth raster)

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: US Geological Survey, Pennsylvania Water Science Center
Publication_Date: June 2010
Title:
Development of Flood-Inundation Maps for the West Branch Susquehanna River near the Borough of Jersey Shore, Lycoming County, Pennsylvania: jshPA_01 (depth raster)
Edition: Version 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Scientific Investigations Report
Issue_Identification: SIR 2010-5057
Publication_Information:
Publication_Place: New Cumberland, Pennsylvania
Publisher: US Geological Survey, PA Water Science Center
Other_Citation_Details:
Correlates to the modeled extent of flooding in shapefile 01549760_23.
Online_Linkage: <http://pa.water.usgs.gov>
Larger_Work_Citation:
Citation_Information:
Originator: US Geological Survey, PA Water Science Center
Publication_Date: 2010
Title:
Development of Flood-Inundation Maps for the West Branch Susquehanna River near Jersey Shore Borough, Lycoming County, Pennsylvania
Online_Linkage: <http://pa.water.usgs.gov>
Description:
Abstract:
Stream flow data, water-surface elevation profiles, and GIS digital elevation models were used to develop a set of eight flood-inundation maps for an approximate 5-mile reach of the West Branch Susquehanna River near the Borough of Jersey Shore, Pa. The inundation maps were created as part of the National Weather Service (NWS) ongoing efforts to focus on continued improvements to the flood forecasting and warning abilities in the Susquehanna River basin, and to modernize their flood forecasting methodologies. The maps correspond to river stage at the USGS streamgaging station (01549760) at Jersey Shore, and were provided to the NWS for incorporation into a web-based flood warning system that can be used to identify areas of predicted flood inundation associated with forecasted flood-peak stages. During times of flooding or predicted flooding, these maps can be used by emergency managers and the public to take proactive steps to protect life and reduce property damage caused by floods.
Purpose:
Scientific Investigations Report SIR 2010-5057 describes the methods and results of hydrologic and hydraulic analyses relative to the development of flood inundation maps for selected water-surface elevations at the NWS flood forecast point on the West Branch Susquehanna River at Jersey Shore, Pa. The inundation maps were developed for an approximate 5 mile reach of the West Branch starting at the confluence of Pine Creek and ending at the confluence of Larrys Creek. Sixteen inundation maps were developed to estimate areas of anticipated flooding for water-surface elevations starting at flood stage and increasing in 1 foot increments up to 2 feet above the flood stage of record.
Supplemental_Information:
This dataset has gone under a thorough review by Ray Davis (NWS).
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: December 2009
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.275648
East_Bounding_Coordinate: -77.217426
North_Bounding_Coordinate: 41.219478
South_Bounding_Coordinate: 41.169524
Keywords:
Theme:
Theme_Keyword_Thesaurus: FEMA Flood Map Modernization Guidelines
Theme_Keyword: flood plain mapping
Theme_Keyword: floodway
Theme_Keyword: inundation area
Theme_Keyword: flood level
Theme_Keyword: gage height
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place:
Place_Keyword: Jersey Shore Borough
Place_Keyword: Lycoming County
Place_Keyword: Pennsylvania
Place_Keyword: West Branch Susquehanna River
Place_Keyword: Pine Creek
Place_Keyword: Larrys Creek
Place_Keyword: Long Island
Access_Constraints: None.
Use_Constraints:
Data can be used by a Geographic Information System (GIS) or image-processing software.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Scott Hoffman
Contact_Organization: US Geological Survey, Pennsylvania Water Science Center
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 215 Limekiln Road
City: New Cumberland
State_or_Province: Pennsylvania
Postal_Code: 17070
Country: US
Contact_Voice_Telephone: (717) 730-6945
Contact_Facsimile_Telephone: (717) 730-6997
Contact_Electronic_Mail_Address: shoffman@usgs.gov
Contact_Electronic_Mail_Address: mroland@usgs.gov
Hours_of_Service: 8:00 AM to 4:30 PM
Data_Set_Credit:
United States Geological Survey, Pennsylvania Water Science Center
Security_Information:
Security_Classification: Unclassified
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7600) ; ESRI ArcCatalog 9.3.1.3000
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: No attributes, floating-point dataset.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
Numbers indicate the modeled depth of water at each specific grid cell. No data values indicate areas where there is no inundation.
Logical_Consistency_Report: Dataset is a floating-point raster format.
Completeness_Report:
This dataset covers the modeled area between Pine Creek and Larrys Creek, including Jersey Shore Borough.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The horizontal accuracy standard follows the NSSDA-1998 standard. The maximum permissable RMSE for 95% of the horizontal check points for the mapping product is 5 feet or better.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The vertical accuracy will meet the requirements of NSSDA at the 95% confidence interval (1.96 x RMSE).
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey
Publication_Date: 20061213
Title: PAMAP Program 3.2 ft Digital Elevation Model of Pennsylvania
Geospatial_Data_Presentation_Form: raster digital data
Online_Linkage:
<http://www.pasda.psu.edu/uci/FullMetadataDisplay.aspx?file=PAMAP_DEM.xml>
Source_Scale_Denominator: 2400
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation:
PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey
Source_Contribution:
PAMAP , consists of a raster digital elevation model with a horizontal ground resolution of 3.2 feet. The model was constructed from PAMAP LiDAR (light Detection and Ranging) elevation points. PAMAP data are organized into blocks, which do not have gaps or overlaps, that represent10,000 feet by 10,000 feet on the ground.
Process_Step:
Process_Description:
Mosaic 10,000' x 10,000' tiles of PAMAP, LiDAR-collected digital elevation model (DEM) data for the study area.
Process_Date: Spring 2009
Process_Step:
Process_Description: Clip mosaicked DEM data to the flood study area polygon.
Process_Date: Spring 2009
Process_Step:
Process_Description:
Use FEMA digital data for flood cross sections and add a field to the feature attribute table for the HEC-RAS estimated flood elevation in NAVD88.
Process_Date: Spring 2009
Process_Step:
Process_Description:
Use the TopoToRaster tool in ArcToolbox to calculate the water surface.
Process_Date: Spring 2009
Process_Step:
Process_Description:
Use the Raster Calculator to subtract the DEM from the water surface elevation. This calculation generates a modeled depth raster of water.
Process_Date: Spring 2009
Process_Step:
Process_Description:
Use Single Output Map Algebra (SOMA) to select depth values greater than zero (0) from the depth raster generated from the Raster Calculator.
Process_Date: Spring 2009
Process_Step:
Process_Description:
Mask grids created from 'orphan' polygons not connected to the main-channel flooded area and 'donut' polygons less than 250' in length (per FEMA mapping guidelines) found inside the main-channel flooded area.
Process_Step:
Process_Description:
Orphan mask grids used to preserve depth values where polygons were greater than 250' in length and determined to be, by modeling, a flooded area.
Process_Step:
Process_Description:
Donut mask grids were used to calculate depth values equal to .10' where polygons were less than than 250' in length in order to fill in areas inside the main-channel flooded area.
Process_Step:
Process_Description: Metadata created.
Process_Date: Fall 2010
Process_Step:
Process_Description:
Update data based on review by Ray Davis, National Weather Service (NWS), Cincinnati, Ohio.
Process_Date: January 2011
Process_Step:
Process_Description: Update metadata.
Process_Date: January 2011
Cloud_Cover: N/A
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 5643
Column_Count: 4949
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: 1.309617
Ordinate_Resolution: 1.309617
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_Distance_Units: feet
Entity_and_Attribute_Information:
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Scott Hoffman
Contact_Organization: US Geological Survey, Pennsylvania Water Science Center
Contact_Position: GIS Specialist
Resource_Description: Downloadable Data
Distribution_Liability:
Although these data have been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy and validity of the data nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection herewith.
Disclaimer for Flood-Inundation Maps: 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 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 March 2009. 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. Additional uncertainties and limitations pertinent to this study may be described elsewhere in this report. 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>.
It should also be noted there are areas of no data values in this dataset that do not match exactly with the inundation polygon dataset. This is due to the manual editing and removing of orphan polygons determined to be artifacts in the GIS processing.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 110.404
Technical_Prerequisites:
This dataset can be used by Geographic Information System (GIS) or image-processing software.
Metadata_Reference_Information:
Metadata_Date: 20120503
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: US Geological Survey, Pennsylvania Water Science Center
Contact_Person: Scott Hoffman
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 215 Limekiln Road
City: New Cumberland
State_or_Province: Pennsylvania
Postal_Code: 17070
Country: US
Contact_Voice_Telephone: (717) 730-6945
Contact_Facsimile_Telephone: (717) 730-6997
Contact_Electronic_Mail_Address: shoffman@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:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Thu May 03 09:18:26 2012