FLOODPLAIN, MARION COUNTY, WEST VIRGINIA USA

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: AMEC Earth and Environmental, Inc.
Publication_Date: 04232010
Title: FLOODPLAIN, MARION COUNTY, WEST VIRGINIA USA
Geospatial_Data_Presentation_Form: FEMA-DCS-Hydraulics
Publication_Information:
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Online_Linkage: <http://hazards.fema.gov>
Larger_Work_Citation:
Citation_Information:
Originator: AMEC Earth and Environmental, Inc.
Publication_Date: 04232010
Title: FEMA CASE MICS_12688
Description:
Abstract:
Recent developments in digital terrain and geospatial database management technology make it possible to protect this investment for existing and future projects to a much greater extent than was possible in the past. The minimum requirement for hydraulics data includes input and output files for all hydraulic models and spatial datasets that are needed to implement the models. (Source: FEMA Guidelines and Specs, Appendix N)
Purpose:
Development of a hydraulic model to provide water-surface elevations for floodplain mapping requires significant investment in time and resources to obtain and process topographic survey data including cross-section and bridge surveys.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 04232010
Currentness_Reference: FIRM Effective Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -80.51
East_Bounding_Coordinate: -79.92
North_Bounding_Coordinate: 39.65
South_Bounding_Coordinate: 39.38
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: inlandWaters
Theme:
Theme_Keyword_Thesaurus: FEMA NFIP Topic Category
Theme_Keyword: Hydraulics
Theme_Keyword: Digital Flood Insurance Rate Map
Theme_Keyword: DFIRM
Theme_Keyword: Flood Hazard Data
Theme_Keyword: 0.2-Percent-Annual-Chance Flood
Theme_Keyword: 10-Percent-Annual-Chance Flood
Theme_Keyword: 1-Percent-Annual-Chance Flood
Theme_Keyword: 2-Percent-Annual-Chance Flood
Theme_Keyword: Stream
Theme_Keyword: Base Flood Elevation
Theme_Keyword: Cross Section
Theme_Keyword: Stream Centerlines
Theme_Keyword: Profile Baseline
Theme_Keyword: Backwater
Theme_Keyword: Base Flood Elevation (BFE)
Theme_Keyword: Elevation Reference Mark (ERM)
Theme_Keyword: Elevation Reference Point (ERP)
Theme_Keyword: Flood Profile
Theme_Keyword: Floodway Data Table
Theme_Keyword: Floodway
Theme_Keyword: Cross-section
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: REGION 3
Place_Keyword: STATE WV
Place_Keyword: COUNTY MARION
Place_Keyword: COUNTY-FIPS 049
Place_Keyword: COMMUNITY MARION (and Incorporated Areas)
Place_Keyword: FEMA-CID 540097
Access_Constraints: None
Use_Constraints:
Acknowledgement of FEMA would be appreciated in products derived from these data. This digital data is produced for the purposes of updating/creating a DFIRM database.

Data_Quality_Information:
Logical_Consistency_Report:
Hydraulic analysis uses all valid existing flood elevation, survey, hydrologic analysis results and other pertinent information for the study area. FEMA approved models are used to compute water surface elevations for required flood events. Computed water surface elevations and topographic data are used to delineate flood hazard boundaries. Roughness coefficients are carefully selected to represent the conditions along stream beds and banks. Base Flood Elevations (BFEs) on the FIRMs and in floodway data tables agree with the flood profiles in the FIS.
Completeness_Report:
Hydraulic analysis provides water surface elevations at different locations along the stream and for different flooding events. Hydraulic submittal includes key physical data used in the process, model parameters and model input. Data developed in surveying and hydrologic analysis are incorporated in hydraulic analysis. Results of hydraulic analysis are used to map Special Flood Hazard Area (SFHA) boundaries. Selection of model parameters (e.g. roughness coefficients, expansion and contraction coefficients, etc) is supported by additional information (e.g. landuse, aerial photo, etc). Model boundary conditions are carefully selected and justified. Modeled velocities are checked for potential erosion.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: 1.00 foot
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: 0.50 foot
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: AMEC Earth and Environmental, Inc.Tech
Publication_Date: 04232010
Title:
FLOODPLAIN ANALYSIS MARION COUNTY, WEST VIRGINIA
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 04232010
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: Other1
Source_Contribution:
AMEC Earth and Environmental, Inc. performed basic hydrologic and hydraulic analysis. The objective was to determine whether several culverts and storm sewer networks constructed after the current effective FIS was issued, will contain the 1% annual chance (100-year) discharge. Floodplain mapping in these four areas is dependent on the results of the culvert and storm sewer capacity analysis.
Process_Step:
Process_Description:
For all streams studied by approximate methods, GIS-based automated hydraulic methodologies were employed. These streams are supported by geo-referenced HEC-RAS models. While hydraulic structures were not incorporated into the models, cross sections were automatically generated and manually adjusted, where applicable, to capture areas of hydraulic contraction.
Process_Date: 04232010

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: 4701
Lambert_Conformal_Conic:
Standard_Parallel: 39
Standard_Parallel: 40.25
Longitude_of_Central_Meridian: -79.5
Latitude_of_Projection_Origin: 38.5
False_Easting: 1968500.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000216
Ordinate_Resolution: 0.000216
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222
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:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: d_grid
Entity_Type_Definition: Flood Depth Grid
Entity_Type_Definition_Source: Raster image representation of flood depths of studied streams
Detailed_Description:
Entity_Type:
Entity_Type_Label: s_fld_haz_ar
Entity_Type_Definition: Location and attributes for Floodplains, 100-year boundaries
Entity_Type_Definition_Source:
FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix N: Data Capture Standards and Data Capture Guidelines (available at <http://www.fema.gov/fhm/dl_cgs.shtm>)
Detailed_Description:
Entity_Type:
Entity_Type_Label: ws_grid
Entity_Type_Definition: Flood Water Surface Grid
Entity_Type_Definition_Source: Raster image representation of flood heights of studied streams
Overview_Description:
Entity_and_Attribute_Overview:
The Hydraulic submittal is made up of several data themes containing both spatial and attribute information. These data represent the extent of flooding and the water surface elevations for the subject area. The spatial data files and attribute tables include stream centerline, cross-sections, flood hazard boundaries, BFEs, flow, roughness coefficients, manmade structures and other data related to the NFIP.
Entity_and_Attribute_Detail_Citation:
Appendix N of FEMA Guidelines and Specifications for FEMA Flood Hazard Mapping Partners contains a detailed description of the data themes and references to other relevant information.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Federal Emergency Management Agency
Contact_Address:
Address_Type: mailing address
Address: 500 C Street, S.W.
City: Washington
State_or_Province: District of Columbia
Postal_Code: 20472
Country: USA
Contact_Voice_Telephone: 1-877-336-2627
Contact_Electronic_Mail_Address: miphelp@mapmodteam.com
Distribution_Liability:
No warranty expressed or implied is made by FEMA regarding the utility of the data on any other system nor shall the act of distribution constitute any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: FEMA-DCS-Survey
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://hazards.fema.gov>
Fees: Contact Distributor

Metadata_Reference_Information:
Metadata_Date: 04232010
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mr. Jon Janowicz
Contact_Organization: FEMA, Region III
Contact_Position: Project Officer
Contact_Address:
Address_Type: mailing address
Address: 615 Chestnut Street
City: Philadelphia
State_or_Province: PA
Postal_Code: 19106-4404
Country: USA
Contact_Voice_Telephone: 1-215-931-5575
Contact_Electronic_Mail_Address: Jon.Janowicz@dhs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Extensions:
Online_Linkage: <http://hazards.fema.gov>
Online_Linkage: <http://www.epsg.org>
Profile_Name: FEMA NFIP Metadata Content and Format Standard

Generated by mp version 2.9.2 on Mon Feb 28 16:59:21 2011