EmergencyFlood_LCBINUNDATION

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: University of Vermont
Publication_Date: 20220525
Publication_Time:
Title: EmergencyFlood_LCBINUNDATION
Edition: First
Geospatial_Data_Presentation_Form: raster digital data, vector digital data
Series_Information:
Series_Name:
Topographically-defined Floodplains for the Lake Champlain Basin, 2013-2017
Issue_Identification: First Edition (2022)
Publication_Information:
Publication_Place: University of Vermont
Publisher: University of Vermont
Other_Citation_Details: Tile Structure - HUC12
Description:
Abstract:
The 2022 Topographically-defined Floodplains for Lake Champlain Basin were generated from high-resolution topographic data along rivers draining greater than 2 square miles. They are for planning and research use by government, academic, commercial and non-governmental agencies; they are not a substitute for FEMA Flood Insurance Rate Maps and they are not intended for regulatory use. The intent was to generate greater geospatial coverage of floodplains in the basin to support restoration and conservation project planning for improved water quality, enhanced flood and climate resilience, and expanded habitat and ecosystem functions.
The model (raster) is served as an ArcGIS Tile Layer and as individual HUC-based .tiff files (downloadable via https://maps.vcgi.vermont.gov/opendata/tileselect_opendata.html?IndexLayerName=Index_EmergencyFlood_LCBINUNDATION&FolderURL=https://drive.google.com/drive/folders/1kjiF04x-zqy_rq8F77IwVOTybheTy93o&cdownload=-1&InputLayerName=EmergencyFlood_LCBINUNDATION&DownloadFields=DOWNLOAD_G). A companion vector layer (Reaches, available via https://geodata.vermont.gov/datasets/2ac04b00651d4f399c54160643e5b53e_0/explore) is included with this dataset to reflect various parameters, notices, and warnings associated with the model run at each reach. The ArcGIS Tile Layer is served in the WGS 1984 Web Mercator Auxiliary Sphere spatial reference; the .tiff files and Reaches are in the NAD 1983 VT State Plane Meters spatial reference.
Dataset is representative of ground conditions at the time of the most recent State of Vermont LiDAR flights; 2013-2017
Additional information is available in report located at https://vcgi.vermont.gov/sites/vcgiupdate/files/doc_library/HAND-based%20Floodplain%20Maps%20Documentation.pdf .
Purpose:
The floodplain maps are primarily for use in restoration and conservation assessments and planning.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20130000
Ending_Date: 20170000
Currentness_Reference: Ground Conditions
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -74.734688
East_Bounding_Coordinate: -71.86162
North_Bounding_Coordinate: 45.689942
South_Bounding_Coordinate: 43.105759
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: inlandWaters
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Floodplain
Theme_Keyword: Topographic
Theme_Keyword: Inundation
Theme_Keyword: Water Quality
Theme_Keyword: Phosphorus
Theme_Keyword: Habitat
Theme_Keyword: Flood Resilience
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Vermont
Place_Keyword: Lake Champlain
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2022
Access_Constraints:
VCGI and the State of VT makes no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Use_Constraints:
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: University of Vermont
Contact_Address:
Address_Type: Mailing and Physical Address
Address: University of Vermont
City: Burlington
State_or_Province: Vermont
Postal_Code: 05405
Country: USA
Contact_Voice_Telephone:
Contact_TDD/TTY_Telephone:
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: Rebecca.Diehl@uvm.edu; Kristen.Underwood@uvm.edu
Hours_of_Service:
Data_Set_Credit:
Rebecca Diehl (UVM Faculty) and Kristen Underwood (UVM Faculty) for leading research group in development of methodology and maps
Security_Information:
Security_Classification_System:
Security_Classification: Unclassified
Security_Handling_Description: No Security Considerations
Native_Data_Set_Environment: ESRI ArcGIS software

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
For assessments of attribute accuracy reference the following publications: Diehl et al 2021 (https://doi.org/10.1371/journal.pone.0248683), Underwood et al 2021 (https://www.uvm.edu/sites/default/files/Vermont-Water-Resources-Lake-Studies-Center/UnderwoodFinalReport20210930.pdf), HAND report (https://vcgi.vermont.gov/sites/vcgiupdate/files/doc_library/HAND-based%20Floodplain%20Maps%20Documentation.pdf)
Logical_Consistency_Report:
Completeness_Report:
Mapping is complete for the Vermont porition of the Lake Champlain Basin for streams that drain more than 2 square-miles. The Lake Champlain Basin was defined according to the HUC12 boundaries obtained from VCGI. Within the Lake Champlain Basin, this dataset is more representative of some settings, and less so of others. For a complete description see the HAND report (https://vcgi.vermont.gov/sites/vcgiupdate/files/doc_library/HAND-based%20Floodplain%20Maps%20Documentation.pdf).
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Vertical_Positional_Accuracy: N/A
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date:
Publication_Time:
Title:
Quality Level 2 Lidar Hydro Enforced Digital Elevation Model (DEMHE) data from the 3D Elevation Program (3DEP)
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Montpelier VT 05620-0501
Publisher: VT Center for Geographic Information
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20130000
Ending_Date: 20170000
Source_Currentness_Reference: May 1, 2022
Source_Citation_Abbreviation:
Source_Contribution:
The Topographically-defined Floodplain maps were identified using the most up-to-date LiDAR coverage for the Lake Champlain Basin in Vermont, which included datasets collected between 2013 and 2017, all of which had the "QL2" rating. The hydro-enforced product was downloaded from the VCGI website. To assure that all barriers to flow were removed on streams draining 2 square miles or more, the DEMHE's were inspected and remaining barriers were removed by editing the original raster. Hydro-Enforced DEMs serve as the foundation for calculating relative elevations for the Height Above Nearest Drainage (HAND) rasters.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date: 20190715
Publication_Time:
Title: Vermont High-Resolution Land Cover (LandLandcov_BaseLC2016)
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Montpelier VT 05620-0501
Publisher: VT Center for Geographic Information
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20190709
Time_of_Day: Unknown
Source_Currentness_Reference:
Source_Citation_Abbreviation:
Source_Contribution:
Vermont Base Land Cover 2016 rasters were downloaded from VCGI and used to identify land cover distributions within modeled reaches. Each land cover type was assigned a manning's roughness value using a look-up table.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date: 20200723
Publication_Time:
Title:
USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for 4-digit Hydrologic Unit- (0430)
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher: U.S. Geological Survey (USGS)
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
Time_of_Day:
Source_Currentness_Reference: 10/16/2005
Source_Citation_Abbreviation:
Source_Contribution:
The NHDPlus HR dataset for the Lake Champlain 4-digut HU was downloaded from The National Map (https://www.sciencebase.gov/catalog/item/5f1b089682cef313ed8824c7) and used to define the reach extents. NHDPlusFlowlineVAA table was joined to the NHDPlusBurnLineEvent feature using the NHDplusID field, and dissolved based on ReachCode. NHDPlus reaches that had a maximum drainage area less than 5.18 square-km were excluded, as were those that fell outside the Lake Champlain Basin in Vermont.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date: 20140103
Publication_Time:
Title: VT Subwatershed Boundaries- HUC12 (WaterHydro_WBD12VT)
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher: National Resource Conservation Service (NRCS)
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
Time_of_Day:
Source_Currentness_Reference: 12/1/2018
Source_Citation_Abbreviation:
Source_Contribution:
The VT subwatershed boundaries were downloaded from the VCGI data portal. HUC12 boundaries define the unit of analysis for execution of the probHAND model. DEM's were clipped to the HUC12 boundary and HAND rasters created for each HUC12.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date: 20140103
Publication_Time:
Title: VT Subbasin Boundaries- HUC8 (WaterHydro_WBD8VT)
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher: National Resource Conservation Service (NRCS)
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
Time_of_Day:
Source_Currentness_Reference: 12/1/2018
Source_Citation_Abbreviation:
Source_Contribution:
The VT subbasin boundaries were used to define the watershed boundaries for stream rasters.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date: 20150508
Publication_Time:
Title: Stream Grid for Vermont (vt_strgrid)
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher: U.S. Geological Survey (USGS)
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
Time_of_Day:
Source_Currentness_Reference:
Source_Citation_Abbreviation:
Source_Contribution:
The Stream Grid is used by the USGS StreamStats application to define the river network. NHDPlus downstream endpoints were created from the NHDPlusBurnLineEvent feature and snapped to the stream grid. The resulting shapefile of endpoints was submitted to the StreamStats V5.04 Batch Processing Tool for analysis of drainage area, upstream water storage, and mean annual precipitation to calculate the flood frequency statistics for that NHDPlus reach.
Process_Step:
Process_Description:
DEMHE clipped to HUC-8 and HUC-12 boundaries. HUC-8 DEMHE's were then resampled to 1 meter resolution and HUC-12 DEMHE's were resampled to 5 meter resolution
Process_Date:
Process_Step:
Process_Description:
NHDPlus HR reaches used to create Lake Champlain, Vermont network
Process_Date: 20210930
Process_Step:
Process_Description: Data provided to VCGI
Process_Date: 20220501
Process_Time:
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:
Contact_Organization:
Contact_Position:

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: RASTER, VECTOR
Direct_Spatial_Reference_Method: raster, vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type:
Point_and_Vector_Object_Count:

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 4400
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999964
Longitude_of_Central_Meridian: -72.500000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 1 / 298.25722210

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label:
(raster data served via ArcGIS Tile Layer and .tiff files) Topographically Defined Floodplains - Lake Champlain Basin (probHAND 2022)
Attribute:
Attribute_Label: VALUE
Attribute_Definition:
Recurrence interval associated with discharge used to define mapped inundation extent, defined by regional regressions in the USGS StreamStats application. A recurrence interval of 2 is indicative of a flood event that is statistically likely to occur once every 2 years, or that has a 50% (1/2) chance of occurring in any given year. A recurrence interval of 5, is indicative of a flood event that is statiscially likely to occur once every 5 years, or has a 20% chance of occurring in any given year (1/5). A recurrence interval of 10 is indicative of a flood event that is statistically likely to occur once every 10 years, or that has a 10% (1/10) chance of occurring in any given year. A recurrence interval of 25, is indicative of a flood event that is statiscially likely to occur once every 25 years, or has a 4% chance of occurring in any given year (1/25). A recurrence interval of 50, is indicative of a flood event that is statiscially likely to occur once every 50 years, or has a 2% chance of occurring in any given year (1/50). A recurrence interval of 100, is indicative of a flood event that is statiscially likely to occur once every 100 years, or has a 1% chance of occurring in any given year (1/100). A recurrence interval of 200, is indicative of a flood event that is statiscially likely to occur once every 200 years, or has a 0.5% chance of occurring in any given year (1/200). A recurrence interval of 500, is indicative of a flood event that is statiscially likely to occur once every 500 years, or has a 0.2% chance of occurring in any given year (1/500).
Attribute_Definition_Source:
Attribute_Domain_Values: 2, 5, 10, 25, 50, 100, 200, 500
Detailed_Description:
Entity_Type:
Entity_Type_Label:
(Reaches vector-layer served via ArcGIS Feature Layer) Reaches Associated with Topographically Defined Floodplains - Lake Champlain Basin (probHAND 2022)
Entity_Type_Definition:
Modeled reach centerline feature class (Topographic_Floodplain_Reaches.shp)
Entity_Type_Definition_Source: NHDPlus HR Reaches
Attribute_Domain_Values:
Attribute:
Attribute_Label: Code
Attribute_Definition: Unique reach ID
Attribute_Definition_Source: NHDPlus HR Reaches, modified
Attribute_Domain_Values: 7-8 digit positive integer
Attribute:
Attribute_Label: Huc8
Attribute_Definition:
Common name of the USGS HUC-8 drainage basin containing the relevant reach
Attribute_Definition_Source: VT Subbasin Boundaries- HUC8 (WaterHydro_WBD8VT)
Attribute_Domain_Values:
Missisquoi River, Lamoille River, Winooski River, Mettawee River, Otter Creek, Lake Champlain
Attribute:
Attribute_Label: Huc12
Attribute_Definition:
Modified ID of the USGS HUC-12 drainage basin containing the relevant reach
Attribute_Definition_Source: VT Subwatershed Boundaries- HUC12 (WaterHydro_WBD12VT)
Attribute_Domain_Values:
Attribute:
Attribute_Label: DA(sq.mi.)
Attribute_Definition: Area draining to modeled reach
Attribute_Definition_Source:
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: Length(m)
Attribute_Definition:
Length used as input to all probHAND model calculations. Originally sourced from NHDPlus HR dataset. Some discrepancies exist between attribute and shape length.
Attribute_Definition_Source: NHDPlus HR Reaches, modified
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 50AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 50% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 20AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 20% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 10AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 10% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 4AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 4% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 2AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 2% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 1AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 1% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 0_5AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 0.5% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: 0_2AEP(cfs)
Attribute_Definition:
Flowrate of the event having a 0.2% annual exceedance probability (AEP).
Attribute_Definition_Source: USGS StreamStats
Attribute_Domain_Values: Real, positive integers
Attribute:
Attribute_Label: Parent
Attribute_Definition: Code of the reach that this reach drains to.
Attribute_Definition_Source:
Attribute_Domain_Values: 7-8 digit integer
Attribute:
Attribute_Label: ShortReach
Attribute_Definition:
Boolean describing whether a reach has a length less than the modeled 500-year floodplain width. Length was determined by the length field, and 500-year floodplain width was found by dividing the 500-year surface area by the reach field. 1 = True, 0 = False
Attribute_Definition_Source:
Attribute_Domain_Values: 0, 1
Attribute:
Attribute_Label: Confluence
Attribute_Definition:
Boolean describing whether the reach confluences with another reach. Useful as an indicator to whether the probHAND backwater algorithm was applied on this reach. 1 = True, 0 = False
Attribute_Definition_Source:
Attribute_Domain_Values: 0, 1
Attribute:
Attribute_Label: RoadCross
Attribute_Definition:
Boolean describing whether the reach crosses a road or bridge. Useful as an indicator for whether the inundation estimates may not be reflecting a hydraulic structure. 1 = True, 0 = False
Attribute_Definition_Source:
Attribute_Domain_Values: 0, 1
Attribute:
Attribute_Label: Waterbody
Attribute_Definition:
Boolean describing whether the reach falls within a lake, in the storage-area of a dam/reservoir, or otherwise appears as an area of impoundment. Visually determined using satellite imagery. 1 = True, 0 = False
Attribute_Definition_Source:
Attribute_Domain_Values: 0, 1
Attribute:
Attribute_Label: LidarYear
Attribute_Definition: Year that lidar for the modeled reach was flown.
Attribute_Definition_Source:
Quality Level 2 Lidar vendor supplied lidar documentation from the 3D Elevation Program (3DEP)
Attribute_Domain_Values: 2013-2017
Attribute:
Attribute_Label: RunDate
Attribute_Definition:
Last date that the model was run and a floodplain was mapped for this reach.
Attribute_Definition_Source:
Attribute_Domain_Values: April-May, 2022

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 1 National Life Dr., Dewey Building, 2nd Floor
City: Montpelier
State_or_Province: Vermont
Postal_Code: 05620-2001
Country: USA
Contact_Voice_Telephone: 802/882-3002
Contact_TDD/TTY_Telephone:
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: vcgi@vermont.gov
Hours_of_Service: 7:45 AM - 4:30 PM, Monday - Friday
Resource_Description: Download from web site.
Distribution_Liability:
VCGI makes no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name:
Format_Specification:
Format_Information_Content: geospatial data
File_Decompression_Technique: ZIP extraction tool
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
Access_Instructions:
Offline_Option:
Offline_Media:
Fees:
Custom_Order_Process:
Technical_Prerequisites: GIS Software
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20220601
Time_of_Day:

Metadata_Reference_Information:
Metadata_Date: 20220610
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: UVM
Contact_Person: Rebecca Diehl
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 94 University Place, University of Vermont
City: Burlington
State_or_Province: VT
Postal_Code: 05405
Country: USA
Contact_Voice_Telephone:
Contact_TDD/TTY_Telephone:
Contact_Facsimile_Telephone:
Metadata_Standard_Name: FGDC Content Standards for Digital Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: Local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: N/A
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: No security considerations

Generated by mp version 2.9.22 on Fri Jun 10 09:24:34 2022