winwatVT

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Scott Olson, U.S. Geological Survey
Publication_Date: 20150228
Title: winwatVT
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Scientific Investigations Report
Issue_Identification: 2015-5077
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
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-xxxx
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 townline upstream to 2,000 feet upstream of the Waterbury-Middlesex townline, 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 exceedence 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-peak inundation maps for documenting the extent of flooding along a reach of the Winooski River in Waterbury, Vermont
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: -72.829939
East_Bounding_Coordinate: -72.709788
North_Bounding_Coordinate: 44.360980
South_Bounding_Coordinate: 44.311369
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: flood-inundation maps
Theme_Keyword: flooded area
Theme_Keyword: river/stream
Theme_Keyword: flood
Theme_Keyword: high-water marks
Theme_Keyword: geospatial analysis
Access_Constraints: None
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 .
Data_Set_Credit:
U.S. Geological Survey, New England Water Science Center, in cooperation with the Federal Emergency Management Agency (FEMA).
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:
A separate review of the modeled flood extents and elevations was conducted.
Completeness_Report:
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 boundaries.
Type_of_Source_Media: None
Source_Citation_Abbreviation: LiDAR Chittenden Floodplain 2007
Source_Contribution: DEM from lidar data
Process_Step:
Process_Description:
Flood-inundation modeling done using lidar DEM, surveyed elevation data, flow data, and high-water-mark data as input to the U.S. Army Corps of Engineers' HEC-GeoRas computer program (U.S. Army Corps of Engineers, 2009). See USGS SIR 2015-5077 for more details.
Process_Date: 20140905
Process_Step:
Process_Description:
Shapefile format of flood-inundation extent was exported from HEC-GeoRas and brought into ESRI ArcGIS.
Process_Date: 20140919

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 8

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: WGS 1984 Web Mercator Auxiliary Sphere
Map_Projection_Parameters:
Other_Projection's_Definition:
PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]-20037700-30241100148923141.92838538-10000010000-100000100000.0010.0010.001true1021003857
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000006714873101998366
Ordinate_Resolution: 0.000000006714873101998366
Planar_Distance_Units: meter
Geodetic_Model:
Horizontal_Datum_Name: D WGS 1984
Ellipsoid_Name: WGS 1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: winwatVT
Entity_Type_Definition: 04288040 flood-inundation area
Entity_Type_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Id
Attribute_Definition: Internal number
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: STAGE
Attribute_Definition: USGS stage height associated with the area, in feet.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Stage
Attribute:
Attribute_Label: ELEV
Attribute_Definition: NAVD 88 elevation that correlates with the stage, in feet.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Elevation in North American Veritical Datum of 1988
Attribute:
Attribute_Label: USGSID
Attribute_Definition: USGS streamgage number
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Streamgage Identifier
Attribute:
Attribute_Label: GRIDID
Attribute_Definition: Idendifier corresponding to the appropriate depth grid.
Attribute_Definition_Source: Author
Attribute_Domain_Values:
Unrepresentable_Domain: Grid identifier
Attribute:
Attribute_Label: QCFS
Attribute_Definition: Discharge in cubic feet per second
Attribute_Definition_Source: Author
Attribute_Domain_Values:
Unrepresentable_Domain: Discharge in cubic feet per second
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 USGS station ID, USGS stage height associated with the area, and NAVD 88 elevation 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: U.S. Geological Survey
Contact_Address:
Address_Type: unknown
City: Reston
State_or_Province: Virginia
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>.

Metadata_Reference_Information:
Metadata_Date: 20150602
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Scott Olson
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
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 10:19:55 2015