12 digit huc boundaries download

Huc12 watershed boundary dataset for 12digit hydrologic units. For questions concerning these data contact mike hart atmike. Numbers were assigned in an upstream to downstream fashion. 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.

Actual hydrologic units often extend beyond the state and county boundaries. Watershed boundary dataset wbd geospatial data gateway. Watershed boundary dataset wbd 12digit subwatershed boundaries 2009. Watershed boundary dataset wbd twelve digit subwatershed boundaries for indiana, 2009 1. The hus are given a hydrologic unit code huc that ranges from 2 digits to 12 digits.

The newest and most recent huc delineation efforts have been completed. Wbd huc 8, 10, 12 polygons and wbd lines are available on the gateway. Huc14 watershed boundary polygons, us and territories, 2016. The 12 digit hucs in the upper washita river basin were selected and a shapefile was created. Hydrologic units are only synonymous with classic watersheds when their boundaries include all the source area contributing surface water to a single defined outlet point. Watershed boundary dataset 12 dijit illinois data basin. Ca usgs watershed boundary dataset 12digit hydrologic units. Eight digit hydrologic unit code required a unique 8digit code from the usgs map series hydrologic unit maps. Archives of huc 2 through 12 as national layers can be downloaded from here in the. This data set consists of georeferenced digital data and associated attributes and is a preliminary release of the 12digit hydrologic unit oklahoma watershed boundary dataset. This polygon shapefile contains the 6th level, 12digit hydrologic unit code huc subwatershed boundaries of california.

Efforts are ongoing to complete 10 and 12 digit unit delineations within 8 digit hydrologic units extending across the u. Geological survey hydrologic unit boundaries for waterresource 2digit regions, 4digit subregions, 6digit basins formerly called accounting units, 8digit subbasins formerly called cataloging units, 10digit watershed, and 12digit subwatersheds in mississippi. Information discovery active projects databases publications reports. Watersheds, nrcs, 1999 mngeo nrcsws99 also known as nrcs 11digit huc. This statewide watershed coverage 12 digit huc was provided by the natural resources conservation service nrcs. 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. Watersheds, hydrologic units, hydrologic unit codes. The watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit hu data consistent with the national criteria for delineation and resolution.

Readme and draft metadata files are included in the zipped file. Available from nrcs wbd data download page select area of interest. Huc 4, huc 8, and huc 12 the watershed boundary dataset wbd maps the full areal extent of surface water drainage for the u. This dataset represents the hydrologic unit boundaries to the 12digit 6th level for the entire united states. Watershed areas huc 12 gis layer was derived from the 12digit national. This data set, part of the watershed boundary data set wbd, is a complete digital hydrologic unit boundary layer to the subwatershed 12 digit. Watershed boundaries are determined solely upon sciencebased hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. Watershed boundary dataset wbd contains all of these nested levels of delineation, plus huc level 10 and huc level 12, in a single dataset. Jan, 2017 this map shows information on drainage and hydrography in the form of u. The national map download viewer provides an online mapping tool for downloading the nhdplus hr, nhd and wbd as a shapefile or file geodatabase by hydrologic unit hu, including 4 digit hu4 or 8 digit hu8, by state, or nationally.

Download certified 12digit huc boundaries and postprocess to make it swat compatible streams. The dataset is complete for the united states to the 12 digit hydrologic unit. Epas 12 digit hydrologic system usepa, 2009 uses a numbering convention that is not entirely consistent with the 14 digit numbering system. There are many different entities that develop watershed plans or fund the development of these plans. This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12digit 6th level for the state of arkansas. Environmental protection agencys grants reporting and tracking system login page. The polygons represent the usgs nhd 12 digit huc polygons which contain known winter roost trees for northern longeared bat myotis septentrionalis. The dataset is complete for the united states to the 12digit hydrologic unit. This field identifies any type of modifications to natural overland flow present in the 12. This file contains hydrologic unit hu polygon boundaries for the united states, puerto rico, and the u. 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.

Watershed boundaries define the aerial extent of surface water drainage to a point. The intent of defining hydrologic units hu for the watershed boundary dataset is to establish a. This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12 digit 6th level for the state of arkansas. 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 data is a seamless national representation of hu boundaries from 2 to 14 digits. The watershed boundary dataset wbd defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. This data set is a digital hydrologic unit boundary layer clipped at new jersey political boundaries to the subwatershed 12digit 6th level for the state of new jersey. This dataset represents a subset of usda nrcsusgsusepa watersheds from the watershed boundary dataset intersecting a 10 km buffer around the gulf coastal plains and ozarks lcc geography.

The 12 digit hydrologic unit tohuc code attribute is the code for the 12 digit hydrologic unit that is downstream from and naturally receives the majority of the flow from another 12 digit hydrologic unit. Ca usgs watershed boundary dataset 12digit hydrologic units in shapefile. Subwatersheds are noted by a 14digit hydrologic unit huc. Ca usgs watershed boundary dataset 12 digit hydrologic units the usgs watershed boundary dataset wbd defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Six easy steps to finding your 12digit hydrologic unit. This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12digit 6th level for the state of rhode island. For some huc14s, the first 12 digits do not match the identification number of the 12 digit hydrologic unit it lies within. 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 12digit. Use choices below to search by address, xy longitude and latitude or by hydrologic unit name, code or number. Chapter 3 of section a, federal standards, book 11. Watershed boundary dataset wbd twelvedigit subwatershed boundaries for indiana, 2009 1. This is a description of attributes by field from the federal standards for delineation of hydrologic unit boundaries.

To download, go to arcgis open data set and click the download button, and under. Use choices below to search by address, xy longitude and latitude or. Where no downstreamupstream relationship could be determined numbers were assigned in a clockwise fashion. 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. The shaded polygons in the map above represent marylands 12digit scale watersheds. Wbds are represented as polygons that define the boundary of the hus. The number of digits in a huc is related to 6 levels of detail for the wbd. A hydrologic unit has a single flow outlet except in coastal or lakefront areas. Each hydrologic unit is identified by a unique hydrologic unit code huc consisting of two to twelve digits based on the six levels of classification.

The data set was reprojected to albers conical equal area projection. This data set consists of georeferenced digital data and associated attributes created in accordance with the fgdc proposal, version 1. Sep 02, 2014 this data set is a complete digital hydrologic unit boundary layer to the subwatershed 12 digit 6th level for the entire united states. Download a zip file that contains an esri shape file and. The wbd redefined the 8digit hydrologic unit boundaries and further subdivided the 8digit hydrologic units into 10 and 12digit hydrologic units. Watershed boundary dataset wbd 12digit huc, level 6.

The wbd is a refinement of the 8digit hydrologic unit map, which in south dakota was based on 1. Usa watershed boundary dataset huc 2, 4, 6, 8, 10, 12. The wbd contains the most current 8 digit, 10 digit and 12 digit hucs and are available below. The 14 and 16digit hydrologic units are optional and are not complete for the nation. This data contains all 12digit hydrologic unit codes clipped to the nc state boundary. The 14 and 16 digit hydrologic units are optional and are not complete for the nation. Twelve digit hydrologic unit code required this field provides a unique 12 digit code for each subwatershed. 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. This map shows the boundary of watersheds in the state of ohio. Download nhd data and postprocess to make it compatible with userdefined subwatershed boundaries. Nrcs list of wbd stewards wbd data downloads and services. These dataset is a complete digital hydrologic unit boundary layer to the subwatershed 12digit 6th level at 1.

Geological survey mailing and physical address 202 nw 66th, bldg. Hydrologic unit boundaries at the 8digit level, covering the states bordering the gulf of mexico are shown. This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12digit 6th level for the state of illinois. This dataset named the watershed boundary dataset further divides the huc levels to 5th and 6th levels. These discrepancies will be corrected when the huc14s are next revised. Thus, these watersheds are smaller in size than the 8digit scale watersheds and generally represent drainage divides between 2nd order riversstreams. Click on the link below, which will take you to the u. Subwatershed boundaries, california 12digit huc, 20 in. This map identifies watersheds where some type of watershed plan has been completed. This spatial layer shows the hydrologic unit boundaries for the 12 digit subwatersheds at a scale of 1.