Description: 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” (http://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.
Copyright Text: Funding for the Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS, USGS and EPA along with other federal, state and local agenciesies. 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
AreaSqKM (type: esriFieldTypeSingle, alias: Area in Square Kilometers, SQL Type: sqlTypeOther, nullable: true, editable: true)
TotDASqKM (type: esriFieldTypeSingle, alias: Total Upstream Catchment Area from Downstream End of Flowline in Square Kilometers, SQL Type: sqlTypeOther, nullable: true, editable: true)
DivDASqKM (type: esriFieldTypeSingle, alias: Divergence-Routed Upstream Catchment Area from Downstream End of Flowline in Square Kilometers, SQL Type: sqlTypeOther, nullable: true, editable: true)
SLOPELENKM (type: esriFieldTypeSingle, alias: Feature Length Used to Compute Slope in Kilometers, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_MA (type: esriFieldTypeSingle, alias: Mean Annual Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_MA (type: esriFieldTypeSingle, alias: Mean Annual Velocity for Mean Annual Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_MA (type: esriFieldTypeSingle, alias: Mean Annual Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_MA (type: esriFieldTypeSingle, alias: Mean Annual Velocity for Mean Annual Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_MA (type: esriFieldTypeSingle, alias: Mean Annual Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_MA (type: esriFieldTypeSingle, alias: Mean Annual Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_01 (type: esriFieldTypeSingle, alias: January Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_01 (type: esriFieldTypeSingle, alias: January Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_01 (type: esriFieldTypeSingle, alias: January Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_01 (type: esriFieldTypeSingle, alias: January Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_01 (type: esriFieldTypeSingle, alias: January Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_01 (type: esriFieldTypeSingle, alias: January Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_02 (type: esriFieldTypeSingle, alias: February Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_02 (type: esriFieldTypeSingle, alias: February Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_02 (type: esriFieldTypeSingle, alias: February Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_02 (type: esriFieldTypeSingle, alias: February Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_02 (type: esriFieldTypeSingle, alias: February Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_02 (type: esriFieldTypeSingle, alias: February Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_03 (type: esriFieldTypeSingle, alias: March Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_03 (type: esriFieldTypeSingle, alias: March Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_03 (type: esriFieldTypeSingle, alias: March Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_03 (type: esriFieldTypeSingle, alias: March Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_03 (type: esriFieldTypeSingle, alias: March Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_03 (type: esriFieldTypeSingle, alias: March Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_04 (type: esriFieldTypeSingle, alias: April Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_04 (type: esriFieldTypeSingle, alias: April Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_04 (type: esriFieldTypeSingle, alias: April Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_04 (type: esriFieldTypeSingle, alias: April Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_04 (type: esriFieldTypeSingle, alias: April Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_04 (type: esriFieldTypeSingle, alias: April Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_05 (type: esriFieldTypeSingle, alias: May Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_05 (type: esriFieldTypeSingle, alias: May Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_05 (type: esriFieldTypeSingle, alias: May Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_05 (type: esriFieldTypeSingle, alias: May Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_05 (type: esriFieldTypeSingle, alias: May Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_05 (type: esriFieldTypeSingle, alias: May Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_06 (type: esriFieldTypeSingle, alias: June Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_06 (type: esriFieldTypeSingle, alias: June Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_06 (type: esriFieldTypeSingle, alias: June Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_06 (type: esriFieldTypeSingle, alias: June Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_06 (type: esriFieldTypeSingle, alias: June Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_06 (type: esriFieldTypeSingle, alias: June Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_07 (type: esriFieldTypeSingle, alias: July Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_07 (type: esriFieldTypeSingle, alias: July Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_07 (type: esriFieldTypeSingle, alias: July Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_07 (type: esriFieldTypeSingle, alias: July Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_07 (type: esriFieldTypeSingle, alias: July Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_07 (type: esriFieldTypeSingle, alias: July Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_08 (type: esriFieldTypeSingle, alias: August Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_08 (type: esriFieldTypeSingle, alias: August Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_08 (type: esriFieldTypeSingle, alias: August Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_08 (type: esriFieldTypeSingle, alias: August Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_08 (type: esriFieldTypeSingle, alias: August Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_08 (type: esriFieldTypeSingle, alias: August Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_09 (type: esriFieldTypeSingle, alias: September Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_09 (type: esriFieldTypeSingle, alias: September Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_09 (type: esriFieldTypeSingle, alias: September Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_09 (type: esriFieldTypeSingle, alias: September Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_09 (type: esriFieldTypeSingle, alias: September Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_09 (type: esriFieldTypeSingle, alias: September Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_10 (type: esriFieldTypeSingle, alias: October Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_10 (type: esriFieldTypeSingle, alias: October Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_10 (type: esriFieldTypeSingle, alias: October Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_10 (type: esriFieldTypeSingle, alias: October Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_10 (type: esriFieldTypeSingle, alias: October Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_10 (type: esriFieldTypeSingle, alias: October Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_11 (type: esriFieldTypeSingle, alias: November Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_11 (type: esriFieldTypeSingle, alias: November Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_11 (type: esriFieldTypeSingle, alias: November Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_11 (type: esriFieldTypeSingle, alias: November Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_11 (type: esriFieldTypeSingle, alias: November Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_11 (type: esriFieldTypeSingle, alias: November Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QA_12 (type: esriFieldTypeSingle, alias: December Mean Monthly Flow from Runoff in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VA_12 (type: esriFieldTypeSingle, alias: December Mean Monthly Velocity for Mean Monthly Flow in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QC_12 (type: esriFieldTypeSingle, alias: December Mean Monthly Flow with Reference Gage Regression in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VC_12 (type: esriFieldTypeSingle, alias: December Mean Monthly Velocity for Mean Monthly Flow with Reference Gage Regression in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
QE_12 (type: esriFieldTypeSingle, alias: December Mean Monthly Flow from Gage Adjustment in Cubic Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
VE_12 (type: esriFieldTypeSingle, alias: December Mean Monthly Velocity from Gage Adjustment in Feet per Second, SQL Type: sqlTypeOther, nullable: true, editable: true)
LakeFract (type: esriFieldTypeSingle, alias: Fraction of Lake Assigned to Flowline, SQL Type: sqlTypeOther, nullable: true, editable: true)
SurfArea (type: esriFieldTypeSingle, alias: Lake Surface Area Assigned to Flowline in Square Meters, SQL Type: sqlTypeOther, nullable: true, editable: true)