The usgs watershed boundary dataset wbd defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Entity type label hydrologic unit code huc 12 boundaries. The watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit hu data consistent with the national criteria for. This map shows one set of watershed boundaries in the continental united states.
Watershed boundaries are determined solely upon sciencebased hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. As with watersheds, the process of identifying hucs is complicated. Locate your watershed by huc mapping interface usgs home contact usgs search usgs. Although the watershed boundaries for this measure are those established at the. These watersheds are equivalent to the huc 11digit codes. Home catalog state data plan iowa financial resources other data sites covid19 in iowa. These still define larger areas than the dnr catchments. Hydrologic units through four levels were created in the 1970s and have been. These codes describe where the unit is in the country and the level of the unit. Hydrologic unit boundaries define the aerial extent of surface water drainage to a point. Watersheds can be as small as a footprint or large enough to encompass all the land that drains water into rivers that drain into chesapeake bay, where it enters the atlantic ocean.
The watershed boundary dataset has been incorporated into the national hydrography dataset as the base hydrologic unit boundaries for nhd hydrography features. Watershed boundaries define the aerial extent of surface water drainage to a point. Watershed boundary dataset for mississippi hydrologic. Geological survey usgs national hydrography dataset nhd and u. To comply with federal standards, njdep met with epa region 3 to delineate 6th level level huc 12 subhuc 12 subwatershed boundaries in nj. The hydrologic unit code huc dataset provides a convenient nationwide set. Hydrologic unit codes huc are developed using a progressive twodigit system where each. The huc organizes watersheds by a nested size hierarchy, so large scale watershed boundaries for an entire region may be assigned a twodigit huc, while small scale, local watershed boundaries within the larger regional watershed may be assigned a 12digit huc.
Watershed boundary dataset wbd 12 digit huc, level 6, georgia, usa watershed boundary dataset wbd 12 digit huc, level 6, georgia, usa sep 2, 2014 uploaded by conservation biology institute. Watersheds huc12 2009 indiana university bloomington. The intent of defining hydrologic units hu for the watershed boundary dataset is to establish a baseline. The parent federal file hua14 identifies watersheds by the federal hydrologic unit code hua or huc code while the state file uses the maryland department of the environment mde watershed codes. This is a description of attributes by field from the federal standards for delineation of hydrologic unit boundaries. The watershed file is generally considered to be map accurate at a scale of 1. This data layer is used to identify the boundaries of watersheds that are hydrographic in nature and contribute to the surface waterbodies within new york state.
Locate your watershed mapping interface for science in your watershed of the u. 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. Link to usgs 8digit hydrologic units and dnr major watersheds link to usgs 6digit hydrologic units and minnesota equivalents link to usgs 4digit hydrologic units and minnesota equivalents. The 12and 10digit huc polygons are part the national watershed boundary database, developed through a combination of manual and semiautomated. They often define the geographic scope for hydrologic or water resource studies and provide the boundaries for aggregated data such as stream networks and the land characteristics that affect water flow and water quality. 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. 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. Twelve digit hydrologic unit code required this field provides a unique 12digit code for each.
Results matching topic of huc 11 federal watersheds and. A hydrological code or hydrologic unit code is a sequence of numbers or letters that identify a hydrological feature like a river, river reach, lake, or area like a drainage basin also called watershed in north america or catchment one system, developed by strahler, known as the strahler stream order, ranks streams based on a hierarchy of tributaries. A geographic area of land, water and biota within the confines of a drainage divide. Usa watershed boundary dataset huc 2, 4, 6, 8, 10, 12 gcpo lcc.
Science in your watershed upper mississippi region. The 12digit hucs in the upper washita river basin were selected and a shapefile was created. Watershed boundary dataset wbd 12digit huc, level 6. Huc level 12 defines the smallest federal drainage units, for example, minnehaha creek 070102060605. The entire united states is divided up into a nested sixlevel hierarchy of drainage areas. Automating datamodel workflows at a level 12 huc scale. The typical sizes of 5 th level 10digit hucs are 16,200 to 101,200 ha, although the total range is much larger. Huc6, huc8, huc10 and huc12 polygons for the usda watershed boundary dataset. The us geologic surveys watershed boundary dataset is a good way of representing this watershed address. The dataset is complete for the united states to the 12digit hydrologic unit. Conservation commission, 2006, the state of oklahoma prioritized its hydrologic unit code huc 11 watersheds approximately 50,000 acres following strategies defined in the clean water action plan and developed and revised a unified watershed assessment uwa framework through oklahoma s nonpoint source nps working group.
Home locate your watershed legacy hucs locate your stream site legacy hucs locate your well site legacy hucs locate your precipitation site legacy hucs. On the following page there are 2 comparative illustrations of the watersheds within a subbasin and the subwatersheds within a watershed. Watersheds, hydrologic units, hydrologic unit codes, watershed approach, and rapid watershed assessments watershed. Typically in the development of the new delineation, the huc 14 subwatersheds had been consolidated or redefined to rebuild the new huc 12 subwatersheds. This polygon shapefile contains the 6th level, 12digit hydrologic unit code huc subwatershed boundaries of california. Chapter 3 of section a, federal standards, book 11. Each successive level of subdivision adds a suffix of two more digits to the base 4digit code creating the standard hydrologic unit code or huc, defining in increasing detail 6digit, 8. Watershed boundary dataset wbd overview history of hydrologic units and supporting documents. Extensions include making a pie chart to show the area of each watershed in the state, researching the watersheds in teams and. This dataset named the watershed boundary dataset further divides the huc levels to 5th and 6th levels. The nrcs assigned each delineated drainage basin a 14digit hydrologicunit code huc. The hus are given a hydrologic unit code huc that ranges from 2 digits to 12 digits.
The sources of the etv data have been transformed from their original file formats to databases so that data can be consumed in multiple ways and be accessible in a distributed computing environment. Each unit was assigned a unique hydrologic unit code huc. Wbd huc 8, 10, 12 polygons and wbd lines are available on the gateway. The selection and delineation of hydrologic boundaries are determined solely upon. Click on the link below, which will take you to the u. The watershed boundary dataset wbd maps the full areal extent of surface water drainage for the u. Usa watershed boundary dataset huc 2, 4, 6, 8, 10, 12.
Nj uses huc 11s and 14s boundaries not updated since 1986. Guidance on the conversion of huc 11s14s to huc 10s12s. What is being automated with this phase is the entire data selection process pertaining to the spatial context of the selected huc12 and the. Each watershed is assigned a unique number, called a pfafsetter code, based. Subwatershed boundaries, california 12digit huc, 20.
The hydrologic unit code huc for the smallest watersheds in this data. Click on the map above to view a particular subregion. North river fourmile creek calhoun creekdes moines river raccoon river big creek sugar creeksouth skunk river beaver creek saylor creekdes moines river. The maps can be used for initial planning regarding diversions.
Department of agriculture usda national resources conservation service nrcs watershed boundary dataset wbd sources. The newest and most recent huc delineation efforts have been completed. This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12digit 6th level for. The watershed and subwatershed hydrologic unit boundaries. Watershed boundary dataset for mississippi hydrologic unit codes huc. These maps are not suitable for use in determining detailed boundaries for diversion permitting of lake erieohio river waters. Minnesota watershedhydrologic unit numbers and names. Comprehensive watershed modeling for 12digit huc priority watersheds phase ii presented by. Watershed boundary dataset wbd 12 digit huc, level 6, california, usa watershed boundary dataset wbd 12 digit huc, level 6, california, usa nov 17, 2014 uploaded by. The data is delivered by subbasin and includes data for huc8, huc10, and huc12. Download certified 12digit huc boundaries and postprocess to. At each level, two digits are tacked on to the hydrologic unit code huc. Geological survey digitized these drainage divides.
New hampshire watershed boundary dataset new hampshire. The smaller sized 6th level subwatersheds up to 250,000 acres are useful for numerous application programs supported by a variety of local, state, and federal agencies. Watershed boundary dataset wbd 12digit subwatershed boundaries, 2009 shows the most recent revision of huc12 watershed boundaries short description. The watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. A hydrological code or hydrologic unit code is a sequence of numbers or letters that identify a. Hydrologic units the following information was taken from the dec master habitat data bank gis server. The california interagency watershed map of 1999 updated may 2004, calw221 is the state of californias working definition of watershed boundaries.
A new 12digit watershed file is available from dnr which provides more detailed line work for over 1 100 watersheds which is approximately equivalent to the huc 14digit code. The data is a seamless national representation of hu boundaries from 2 to 14 digits compiled from u. The huc8, huc10, and huc12 datasets are displayed in this map. This document establishes federal standards and procedures for creating the wbd as seamless and hierarchical hydrologic unit data, based on topographic and hydrologic features. This service includes hu boundaries for huc2 regions, huc4 subregions, huc6 basin, huc8 subbasins, huc10 watersheds, huc12. Six easy steps to finding your 12digit hydrologic unit. Watersheds are composed of all the land and surface water areas that drain to a given point on a stream or river. Zoom the map to your area of interest, then click on the red watershed labels for more information. Geological survey mailing and physical address 202 nw 66th, bldg. Huc8 watersheds will be enhanced to 12digit hydrologic unit code huc12 watersheds with improved methods and greater spatial detail white et al. In new hampshire the largest unit is the river basin with its 4digit identifier. This nyc reservoirs watershed areas huc 12 gis layer was derived from the 12digit national watershed boundary database wbd at 1. Middle creek north river mud creek beaver creek camp creek walnut creek big creek lower fourmile creek jordan creekraccoon river middle fourmile creek.
Watershed boundary dataset wbd twelvedigit subwatershed boundaries for indiana, 2009 1. Eight digit hydrologic unit code a unique 8digit code from the usgs map series hydrologic unit maps. Watersheds, hydrologic units, hydrologic unit codes. The data set was reprojected to albers conical equal area projection.
The california water boards annual performance report. The problem is that it is impossible to map watersheds, basins, or catchments of. Eight digit hydrologic unit code required a unique 8digit code from the usgs map series hydrologic unit maps. 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. Hydrologic units through four levels were created in the 1970s and have been used extensively throughout the united states. Mapping hydrologic units for the national watershed boundary dataset. Federal codes and names and minnesota codes and names. Huc 4, huc 8, and huc 12 the watershed boundary dataset wbd maps the full. The wbd contains the most current 8digit, 10digit and 12digit hucs and are available below. Where watersheds cross county boundaries the county codes were added together, comma delimited. Students will color the different watersheds in the southwest to learn which rivers drain out of each area of the stateregion. Huc 4, huc 8, and huc 12, enviroatlas supplemental data fact sheet, december 20, update february 2017.
490 1132 1045 1169 191 1115 1535 998 428 699 1259 1535 384 967 749 218 1036 592 563 1515 457 130 1029 1341 1029 1447 1492 1083 1002 317 569 109 1318 1249 1248 543 580 493 686 498 829