The national map viewer allows free downloads of public domain wbd and nhd data in either. A huc describes where the unit is in the country and the level of the unit. Watersheds, hydrologic units, hydrologic unit codes. Hydrologic units through four levels were created in the 1970s and have been used extensively throughout the united states. Watershed boundary dataset wbd contains all of these nested levels of delineation, plus huc level 10 and huc level 12, in a single dataset. A geographic area of land, water and biota within the confines of a drainage divide. This map shows information on drainage and hydrography in the form of u.
Hydrologic units are given a hydrologic unit code huc. This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12 digit 6th level for the coterminous united states. The water resources mission area creates a wide variety of spatial products from gis datasets, online mappers and decisionsupport tools, data visualizations, and traditional static maps. Harvest object id, 11e12ea934144ad89022 3e6c174befa4. Watershed boundary dataset wbd twelvedigit subwatershed boundaries for indiana, 2009 1. Each hydrologic unit is labeled with its 12 digit huc. The hus are given a hydrologic unit code huc that ranges from 2 digits to 12 digits.
Our hydrologic monitoring stations continue to send data in near realtime to nwisweb, and we are continuing critical water monitoring activities to. The following is extracted from usda, nrcs metadata this data set, part of the watershed boundary data set wbd, is a complete digital hydrologic unit boundary layer to the subwatershed 12 digit 6th level for the entire united states. The watershed boundary dataset wbd from the national map tnm defines the perimeter of drainage areas formed by the terrain and other landscape characteristics. The watershed boundary dataset wbd defines the areal extent of surface water. Information discovery active projects databases publications reports. Corresponding 10digit hucs and 8digit hucs are shown in attribute table. Subwatershed boundaries, california 12digit huc, 20. Ca usgs watershed boundary dataset 12digit hydrologic. Hydrologic unit boundaries define the aerial extent of surface water drainage to a point. Watershed boundary dataset wbd 12digit subwatershed. Watershed boundary dataset wbd geospatial data gateway. The document federal standards and procedures for the national watershed boundary dataset wbd can be found here.
Watershed boundary dataset 8, 10, and 12 digits wvgistc. The nrcs assigned each delineated drainage basin a 14digit hydrologicunit code huc. Environmental protection agencys grants reporting and tracking system login page. Sparrow model results of mean daily streamflow and average annual total nitrogen, total phosphorus and suspended sediment load in southeast us streams. Boxpoint current extent coordinates located point polygon. The usgs huc 12 watersheds were created by usgs and the natural resources conservation service nrcs as part of a nationwide mapping effort. The watershed boundary dataset wbd from the national map tnm defines the.
It is the one stop source for environmental and natural resources data, at any time, from anywhere, to anyone. Numeric identifier for each level 2,4,6,8,10, and 12 of hydrologic units. Review data availability status maps obtain data by state, county, or other area. The drainage areas are nested within each other so that a large drainage area, such as the upper mississippi river, will be composed of multiple smaller drainage areas, such as the. Click on the link below, which will take you to the u. Hydrologic unit codes huc are developed using a progressive two digit system where each successively smaller areal unit is identified by adding two. This polygon shapefile contains the 6th level, 12 digit hydrologic unit code huc sub watershed boundaries of california. The second item, source, is an attribute of each bounding line segment arc and incorporates a code to define the source and scale of the source linework. Wbdhu14 represents the 14digit hydrologic unit boundaries. Huc14 watershed boundary polygons, us and territories. The nhdplus high resolution nhdplus hr, national hydrography dataset nhd, and watershed boundary dataset wbd are available for download and as map services all nhd downloads contain a copy of the corresponding wbd dataset that is current only to the date the nhd dataset was created.
This data set consists of georeferenced digital data and associated attributes and is a preliminary release of the 12 digit hydrologic unit oklahoma watershed boundary dataset, part of the national watershed boundary dataset. At a minimum, the wbd is being delineated and georeferenced to the usgs 1. Name assigned to each level 2,4,6,8,10, and 12 of hydrologic unit. The data set was then imported into the geodatabase and metadata written. Available from nrcs wbd data download page select area of interest.
This system divides the country into 21 regions 2digit, 222 subregions 4digit, 370 basins 6digit, 2,270 subbasins 8digit, 20,000 watersheds 10digit, and 100,000 subwatersheds 12 digit. Federal codes and names and minnesota codes and names. A hydrologic unit is a drainage area delineated to nest in a multilevel, hierarchical drainage system. Watershed boundaries define the aerial extent of surface water drainage to a point. There are over 3000 huc 12 watersheds in the entire. Geomorphic and other considerations used to develop the hydrologic unit. Usa watershed boundary dataset huc 2, 4, 6, 8, 10, 12.
Minnesota watershed hydrologic unit numbers and names. All nhdplus hr downloads contain a copy of the nhd and wbd datasets used to create the the nhdplus. Watersheds, hydrologic units, hydrologic unit codes, watershed approach, and rapid watershed assessments watershed. A watershed is a natural landscape unit in which all of the precipitation that falls flows to the same outlet or basin. This layer consists of georeferenced digital data and associated attributes created in accordance with the usgs national map accuracy standards and the nrcs federal standards for delineation of hydrologic unit boundaries, 100104. The geospatial data gateway gdg provides access to a map library of over 100 high resolution vector and raster layers in the geospatial data warehouse. The intent of defining hydrologic units hu for the watershed boundary dataset is to establish a baseline drainage boundary framework, accounting for all land and surface areas. Subwatersheds, 14digit, hydrologic units, in indiana, us geological survey, 1. This dataset named the watershed boundary dataset further divides the huc levels to 5th and 6th levels. Geological survey mailing and physical address 202 nw 66th, bldg. The data set was reprojected to albers conical equal area projection.
This spatial layer shows the hydrologic unit boundaries for the 12 digit sub watersheds at a scale of 1. Six easy steps to finding your 12digit hydrologic unit. These include the national hydrography dataset nhd, watershed boundary dataset wbd, and nhdplus high resolution nhdplus hr. Notice the usgs water resources mission areas priority is to maintain the safety and wellbeing of our communities, including providing critical situational awareness in times of flooding in all 50 u. Huc 4, huc 8, and huc 12 the watershed boundary dataset wbd maps the full areal extent of surface water drainage for the u. Geological survey hydrologic unit boundaries for water resource 2digit regions, 4digit subregions, 6digit basins formerly called accounting units, 8digit subbasins formerly called cataloging units, 10digit watershed, and 12 digit subwatersheds in mississippi. The national hydrography dataset nhd is a featurebased database that interconnects and uniquely identifies the stream segments or reaches that make up the nations surface water drainage system. Geological survey usgs developed a hierarchical hydrologic unit code huc for the united states. The resulting geographical information system gis data set provides a base layer of drainage boundaries and watershed information that may be used in a wide variety of applications by individuals. Actual hydrologic units often extend beyond the state and county boundaries. This dataset represents the hydrologic unit boundaries to the 12digit 6th level. The watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit hu data consistent with the national criteria for.
Hydrography data are integral to a myriad of mission critical activities undertaken and managed by government entities federal, state. Wbd polygon attributes include hydrologic unit codes huc, size in the form. Usgs watershed boundary dataset wbd for 2digit hydrologic. The wbd redefined the 8digit hydrologic unit boundaries and further subdivided the 8digit hydrologic units into 10 and 12 digit hydrologic units. Hu 12 s have a 12 digit hydrologic unit code and represent the 6th level of division of the wbd. Chapter 3 of section a, federal standards, book 11. This service is intended to be use by anyone who may need to show 12 digit subwatershed on their maps. The first, huc, stands for the hydrologic unit code and includes the 8digit cataloging unit as assigned to the basin polygon by the u. The wbd contains the most current 8digit, 10digit and 12 digit hucs and are available below. This data set consists of georeferenced digital data and associated attributes created in accordance with the federal guidelines, requirements, and procedures for the national watershed boundary dataset. Wbd line attributes contain the highest level of hydrologic unit for each boundary, line source information and flow modifications. Watershed boundary dataset wbd 12digit huc, level 6. The dataset is complete for the united states to the 12digit hydrologic unit. Federal standards and procedures for the national wbd 4th ed, 20.
Ca usgs watershed boundary dataset 12digit hydrologic units in shapefile. All nhdplus hr downloads contain a copy of the nhd and wbd datasets used to create the the nhdplus hr. The watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. Watersheds are delineated by usgs using a nationwide system based on surface hydrologic features. Click on title to download individual files attached to this item. Locate your watershed legacy hucs locate your stream site legacy hucs locate your well site legacy hucs locate your precipitation site legacy hucs locate your stream site by wbd links by watershed. Watershed boundaries, huc 10, for california sciencebase. Geological survey digitized these drainage divides. 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. The second item, source, is an attribute of each bounding line segment arc and incorporates a code to define the source and scale of.
Usa watershed boundary dataset huc 2, 4, 6, 8, 10, 12 gcpo lcc. Water resources information from the us geological survey. Usgs national water census water budget data resources for the interior puerto rico huc 2101 turn off compatibility view settings in ie if having problems viewing this site epa watershed assessment, tracking and environmental results waters for the interior puerto rico huc 2101. This dataset represents a subset of usda nrcs usgs usepa watersheds from the watershed boundary dataset intersecting a 10 km buffer around the gulf coastal plains and ozarks lcc geography. Ca usgs watershed boundary dataset 12digit hydrologic units. Department of agriculture, natural resources conservation service abstract the watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. The number of digits in a huc is related to 6 levels of detail for the wbd. Arcs are attributed with the highest hydrologic unit code for each watershed, linesource and a metadata reference file. The 12 digit hucs in the upper washita river basin were selected and a shapefile was created. In the mid1990s the nrcs delineated and digitized watersheds level 5 hydrologic units on 1. Usgs national water census water budget data resources for the trinity huc 18010211 turn off compatibility view settings in ie if having problems viewing this site epa watershed assessment, tracking and environmental results waters for the trinity huc 18010211. Watershed boundary dataset 12 dijit illinois data basin. The huc describes where the unit is in the country and the level of the unit. The usgs manages surface water and hydrologic unit mapping for the nation as geospatial datasets.
This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12 digit 6th level for the entire united states. This data set consists of georeferenced digital data and associated attributes created in accordance with the federal guidelines, requirements, and. These codes describe where the unit is in the country and the level of the unit. Geological survey usgs map layer displays the national watershed boundary dataset wbd. This data contains all 12 digit hydrologic unit codes clipped to the nc state boundary.
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