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Watersheds
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" "Standard" (https://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level) for the entire United States. Some areas may also include additional subdivisions representing the 14- and 16-digit hydrologic unit (HU). At a minimum, the HUs are delineated at 1:24,000-scale in the conterminous United States, 1:25,000-scale in Hawaii, Pacific basin and the Caribbean, and 1:63,360-scale in Alaska, meeting the National Map Accuracy Standards (NMAS). Higher resolution boundaries are being developed where partners and data exist and will be incorporated back into the WBD. WBD data are delivered as a dataset of polygons and corresponding lines that define the boundary of the polygon. WBD polygon attributes include hydrologic unit codes (HUC), size (in the form of acres and square kilometers), name, downstream hydrologic unit code, type of watershed, non-contributing areas, and flow modifications. The HUC describes where the unit is in the country and the level of the unit. WBD line attributes contain the highest level of hydrologic unit for each boundary, line source information and flow modifications. The intent of defining Hydrologic Units (HU) within the Watershed Boundary Dataset is to establish a base-line drainage boundary framework, accounting for all land and surface areas. Hydrologic units are intended to be used as a tool for water-resource management and planning activities particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. The WBD complements the National Hydrography Dataset (NHD) and supports numerous programmatic missions and activities including: watershed management, rehabilitation and enhancement, aquatic species conservation strategies, flood plain management and flood prevention, water-quality initiatives and programs, dam safety programs, fire assessment and management, resource inventory and assessment, water data analysis and water census.</purpose><supplinf>The WBD was produced and is maintained through a cooperative process involving state, federal and local partners. Process information for a specific state or region can be found within the state specific metadata located at ftp://rockyftp.cr.usgs.gov/ngtoc/hydro/outgoing/WBDArchivedMetadata/. This metadata file has information for WBD features contained in the WBD feature dataset. This includes information about the 2-, 4-, 6-, 8-, 10-, 12-, 14-, 16-digit polygons and WBD_Line dataset. Users accessing the WBD via shapefile will need to search for the attribution related to that specific dataset.</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Funding for the Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS, USGS and EPA along with other federal, state and local agencies. Representatives from many agencies contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the WBD Standards. Acknowledgment of the originating agencies would be appreciated in products derived from these data. See dataset specific metadata for further information
U.S. Geological Survey (USGS)
National Geospatial Technical Operations Center
P.O. Box 25046
Denver, CO 80225
1-877-275-8747
bpgeo@usgs.gov
U.S. Department of Agriculture - Natural Resource Conservation Service (NRCS)
U.S. Environmental Protection Agency (EPA)
Other Federal, State, and local partners (see dataset specific metadata for details ftp://rockyftp.cr.usgs.gov/ngtoc/hydro/outgoing/WBDArchivedMetadata)
20200908
USGS National Watershed Boundary Dataset in FileGDB 10.1 format (published 20200908)
inlandWaters
Watershed Boundary Dataset
WBD
Hydrologic Units
Hydrologic Unit Code
HUC
Region
Sub-region
Basin
Sub-basin
Watershed
Subwatershed
2-digit
4-digit
6-digit
8-digit
10-digit
12-digit
14-digit
16-digit
National Watershed Boundary Dataset (WBD)
State
FileGDB 10.1
The intent of defining Hydrologic Units (HU) within the Watershed Boundary Dataset is to establish a base-line drainage boundary framework, accounting for all land and surface areas. Hydrologic units are intended to be used as a tool for water-resource management and planning activities particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. The WBD complements the National Hydrography Dataset (NHD) and supports numerous programmatic missions and activities including: watershed management, rehabilitation and enhancement, aquatic species conservation strategies, flood plain management and flood prevention, water-quality initiatives and programs, dam safety programs, fire assessment and management, resource inventory and assessment, water data analysis and water census.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in the United States. The Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated and users are responsible for obtaining the latest version of the data from the source distributor. Acknowledgment of the origination agencies would be appreciated in products derived from these data.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.1.7333
1
-179.229655
179.856675
71.439573
-14.610193
WBDHU10
Feature Class
18843
objectid
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
tnmid
TNMID
String
40
0
0
metasourceid
MetaSourceID
String
40
0
0
sourcedatadesc
SourceDataDesc
String
100
0
0
sourceoriginator
SourceOriginator
String
130
0
0
sourcefeatureid
SourceFeatureID
String
40
0
0
loaddate
LoadDate
Date
8
0
0
areasqkm
AreaSqKm
Double
8
0
0
areaacres
AreaAcres
Double
8
0
0
referencegnis_ids
ReferenceGNIS_IDs
String
50
0
0
name
Name
String
120
0
0
states
States
String
50
0
0
huc10
HUC10
String
10
0
0
hutype
HUType
String
1
0
0
humod
HUMod
String
30
0
0
shape
Shape
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
File Geodatabase Feature Class
dataset
EPSG
6.14(3.0.1)
18843
Simple
FALSE
18843
TRUE
FALSE
20200925