Depth Grid of the Floodplain for the Winooski River through Waterbury, Vermont, Stage 423 feet.

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey, New England Water Science Center
Publication_Date: 20150228
Title:
Depth Grid of the Floodplain for the Winooski River through Waterbury, Vermont, Stage 423 feet.
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Scientific Investigations Report
Issue_Identification: 2015-5077
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Other_Citation_Details:
Additional details regarding the development of the data can be found at Olson, S.A., 2015, Flood maps for the Winooski River in Waterbury, Vermont, 2014: U.S. Geological Survey Scientific Investigations Report 2015-5077, xx p.
Larger_Work_Citation:
Citation_Information:
Originator: U.S. Geological Survey, New England Water Science Center
Publication_Date: 20150331
Title: Flood maps for the Winooski River in Waterbury, Vermont, 2014
Series_Information:
Series_Name: U.S. Geological Survey Scientific Investigations Report
Issue_Identification: 2015-5077
Online_Linkage: <http://pubs.usgs.gov/sir/2015/5077>
Description:
Abstract:
Digital flood-inundation maps for a 8.3-mile reach of the Winooski River from 1,000 feet downstream of the Waterbury-Bolton town line upstream to 2,000 feet upstream of the Waterbury-Middlesex town line, were created by the U.S. Geological Survey (USGS) in cooperation with the Federal Emergency Management Agency. 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 Winooski River above Crossett at Waterbury, Vermont (station number 04288040). 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 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 hydraulic model was then used to determine 8 water-surface profiles for flood stages at 2-ft intervals referenced to the streamgage datum and ranging from bankfull to approximately the 0.2-percent annual exceedance probability flood. The flood-peak inundation area was modeled in a GIS by combining steady-state hydraulic modeling and available lidar digital elevation model (DEM) data. Information about the study, floods, and methods used can be found in the USGS Scientific Investigations Report 2015-5077. <http://pubs.usgs.gov/sir/2015-5077>
Purpose:
This dataset was created to support the development of flood inundation maps for documenting the extent of flooding along a reach of the Winooski River in Waterbury, Vermont
Supplemental_Information:
A GIS application was used to produce a plane representing the flood water surface. The application duplicates the water-surface-elevation data from cross-section points across the flood plain perpendicular to the direction of the flood flow. Elevations between water-surface points on the cross-sections are proportional interpolations of the water-surface-elevation data and were positioned to generate a flood surface sloping with the water flow. A raster surface was created with the data points using a spline interpolation method, forming the estimated flood surface. A flood-depth grid was made by subtracting the DEM from the flood surface. The flood inundation areas are available in a GIS format, polyline shapefile, that provides extent of the flood peak for each stage level. This format allows the GIS data to be overlain on maps and aerial photographs, and to be used for various GIS applications, such as FEMA's Hazards U.S. Multi-Hazards (HAZUS-MH) program to estimate flood damages. For more information on data processing and checking procedures, see the full report at <http://pubs.usgs.gov/sir/2015/5077>. 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: 20141204
Currentness_Reference: Generated in 2014
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.829628
East_Bounding_Coordinate: -72.709819
North_Bounding_Coordinate: 44.361165
South_Bounding_Coordinate: 44.311156
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: river/stream
Theme_Keyword: high-water marks
Theme_Keyword: flood-inundation maps
Theme_Keyword: flooded area
Theme_Keyword: flood
Theme_Keyword: geospatial analysis
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Winooski River
Place_Keyword: Vermont
Place_Keyword: Waterbury
Access_Constraints: None. This dataset is provided by USGS as a public service.
Use_Constraints:
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. The flood boundaries shown were estimated using water stages at the USGS streamgaging station 04288040, Winooski River above Crossett Brook at Waterbury, Vermont, steady-state hydraulic modeling (assuming unobstructed flow) and a digital elevation model. The hydraulic model reflects the land-cover characteristics and any bridge, dam, levee, or other hydraulic structures existing July 2013. Unique meteorological factors (timing and distribution of storm) could cause actual streamflows along the modeled reach to vary from those assumed during a flood, which may lead to deviations from the water-surface elevations and inundation boundaries shown here. Additional areas may be flooded owing to unanticipated backwater from major tributaries along the main stem or from localized debris- or ice-jams. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. Although USGS intends to make this server available 24 hours a day, 7 days a week, timely delivery of data and products from this server through the Internet is not guaranteed. 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. If this series of flood inundation maps will be used in conjunction with National Weather Service (NWS) river forecasts, the user needs to be aware of additional uncertainties which may be inherent or factored into NWS forecast procedures. The NWS uses river forecast models to estimate the quantity and timing of water flowing through selected river reaches in the United States. These forecast models (1) estimate the amount of runoff generated by a precipitation event, (2) compute how the water will move downstream, and (3) predict the flow and stage (water-surface elevation) for the river at a given location (Advanced Hydrologic Predictions Service 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, New England Water Science Center
Contact_Address:
Address_Type: mailing and physical
Address: 331 Commerce Way
City: Pembroke
State_or_Province: New Hampshire
Postal_Code: 03275
Contact_Voice_Telephone: (603)-226-7800
Data_Set_Credit:
U.S. Geological Survey, New England Water Science Center, in cooperation with the Federal Emergency Management Agency (FEMA).
Security_Information:
Security_Classification_System: not known
Security_Classification: Unclassified
Security_Handling_Description: not known
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143

Data_Quality_Information:
Logical_Consistency_Report:
Used cross-section data points from surveyed data, accurate to the datum of the survey. Flood inundation extent was manually checked. A separate review of the modeled flood extents and elevations was conducted.
Completeness_Report:
Used cross-section data points from surveyed data, accurate to the datum of the survey. Flood inundation extent was manually checked. Complete for the intended 8.3-mile reach of the Winooski River in Waterbury, Vermont.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Sanborn Map Company, Inc.
Publication_Date: 20070101
Title: LiDAR Chittenden Floodplain 2007
Other_Citation_Details:
The 8-foot DEM from lidar is the dominant elevation source for delineation of the flood boundary and computation of the depth grid.
Type_of_Source_Media: None
Source_Citation_Abbreviation: LiDAR Chittenden Floodplain 2007
Source_Contribution: DEM from lidar data
Process_Step:
Process_Description:
A GIS application was used to produce a plane representing the flood-peak water surface. The application duplicates water-surface-elevation data from cross-section points of the hydraulic model across the flood plain. Elevations between water-surface points on the cross-sections are proportional interpolations of the water-surface-elevation data and were positioned to generate a flood surface sloping with the water flow. A raster surface was created with the data points using a spline interpolation method, forming the estimated flood surface. A flood-depth grid was made by subtracting the DEM from the flood surface raster.
Process_Date: 20141001
Process_Step:
Process_Description: Projected data set to Web Mercator Auxiliary Sphere (WKID 3857)
Process_Date: 20141201

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 2266
Column_Count: 3911

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD 1983 StatePlane Vermont FIPS 4400 Feet
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9999642857142858
Longitude_of_Central_Meridian: -72.5
Latitude_of_Projection_Origin: 42.5
False_Easting: 1640416.666666667
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000007286171666009978
Ordinate_Resolution: 0.000000007286171666009978
Planar_Distance_Units: foot_us
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: depth423, 04288040 (station ID)
Entity_Type_Definition: 04288040 (station ID) flood inundation area
Entity_Type_Definition_Source: U.S. Geological Survey
Overview_Description:
Entity_and_Attribute_Overview:
Each entity corresponds to an estimated flood extent area for stream stages 417-431 feet at the USGS streamgage 04288040, Winooski River above Crossett Brook at Waterbury, Vermont. The attributes represent the depth range that correlates with the stage.
Entity_and_Attribute_Detail_Citation:
Olson, S.A., 2015, Flood Maps for the Winooski River at Waterbury, Vermont, 2014: U.S. Geological Survey Scientific Investigations Report 2015-5077, xx p.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: US Geological Survey, New England Water Science Center
Contact_Address:
Address_Type: physical
Address: 331 Commerce Way
City: Pembroke
State_or_Province: New Hampshire
Postal_Code: 03275
Country: US
Contact_Voice_Telephone: 603-226-7800
Distribution_Liability:
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. The flood boundaries shown were estimated using water stages at the USGS streamgaging station 04288040, Winooski River above Crossett Brook at Waterbury, Vermont, steady-state hydraulic modeling (assuming unobstructed flow) and a digital elevation model. The hydraulic model reflects the land-cover characteristics and any bridge, dam, levee, or other hydraulic structures existing July 2013. Unique meteorological factors (timing and distribution of storm) could cause actual streamflows along the modeled reach to vary from those assumed during a flood, which may lead to deviations from the water-surface elevations and inundation boundaries shown here. Additional areas may be flooded owing to unanticipated backwater from major tributaries along the main stem or from localized debris- or ice-jams. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. Although USGS intends to make this server available 24 hours a day, 7 days a week, timely delivery of data and products from this server through the Internet is not guaranteed. 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. If this series of flood inundation maps will be used in conjunction with National Weather Service (NWS) river forecasts, the user needs to be aware of additional uncertainties which may be inherent or factored into NWS forecast procedures. The NWS uses river forecast models to estimate the quantity and timing of water flowing through selected river reaches in the United States. These forecast models (1) estimate the amount of runoff generated by a precipitation event, (2) compute how the water will move downstream, and (3) predict the flow and stage (water-surface elevation) for the river at a given location (Advanced Hydrologic Predictions Service 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:
Format_Name: Arc GRID file
Format_Version_Number: 1
Technical_Prerequisites:
Data are supplied in ArcINFO format. Format compatibility is the user's responsibility.

Metadata_Reference_Information:
Metadata_Date: 20150602
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: 507 National Center
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Country: US
Contact_Voice_Telephone: 1-888-275-8747 (1-888-ASK-USGS)
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

Generated by mp version 2.9.16 on Tue Jun 02 10:22:41 2015