The watershed boundary dataset wbd was created from a variety of sources from each state and aggregated into a standard national layer for use in strategic planning and. Aug 01, 2018 watershed boundary dataset wbd usgs national map downloadable data collection metadata updated. To comply with federal standards, njdep met with epa region 3 to delineate 6th level level huc 12 subhuc 12 sub watershed boundaries in nj using 2002 stream data. 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 12digit 6th level for the entire united states. Watersheds are composed of all the land and surface water areas that drain to a given point on a stream or river. At a minimum, they are being delineated and georeferenced to the usgs 1. Our hydrologic monitoring stations continue to send data in near realtime to nwisweb, and we are. 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, noncontributing areas, and flow modifications. Geological survey, federal center, box 25425, denver, co 80225. Then well retrieve gages with discharge from this watershed using the dataretrieval package. 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 subbasin 8digit 4th level for the entire united states. Nj uses huc 11s and 14s boundaries not updated since 1986.
Simply put, hydrologic units represent the area of the landscape that drains to a portion of the stream network. The usgs investigates the occurrence, quantity, quality, distribution, and movement of surface and underground waters and disseminates the data to the public, state and local governments, public and private utilities, and other federal agencies involved with managing our water resources. That sentence and the title of the framework both imply that hucs. Geological surveys catalog of information on water data.
Nwis site inventory grouped by county in middle north canadian huc 11100301. As stated by the federal standard for delineation of hydrologic unit boundaries. Sep 02, 2014 this data set is a complete digital hydrologic unit boundary layer to the subwatershed 12digit 6th level for the entire united states. It defines the areal extent of surface water drainage to a point except in coastal or lake. Watershed boundary dataset the watershed boundary dataset wbd provides hydrologic units that define drainage areas for surface water. Newest list of hydrologic units are the watershed boundary dataset wbd the newest and most recent huc delineation efforts have been completed. The watershed boundary dataset wbd is a seamless, national hydrologic unit dataset. Watersheds, hydrologic units, hydrologic unit codes, watershed approach, and rapid watershed assessments watershed. The maps are plotted on the geological survey state basemap series at a scale of 1.
If a foreign cyprinid is known only from one site in a drainage, then the entire drainage is color coded either red or pink. We will be using sf throughout these examples to manipulate the points and polygon for the gages and huc. Apr, 2016 in contrast to the huc units described above, the state colors do not provide information concerning the population status of the species that is, reproducing versus nonreproducing. Nwis site inventory grouped by county in mimbres huc 30202. Geological survey usgs developed a hierarchical hydrologic unit code huc for the united states. The watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit hu data consistent with the national criteria for delineation and resolution. A huc describes where the unit is in the country and the level of the unit.
Watershed boundaries define the aerial extent of surface water drainage to a point. The wbd is a refinement of the 8digit hydrologic unit map, which in south dakota was based on 1. The national wetlands inventory nwi was established by the us fish and wildlife service fws to conduct a nationwide inventory of u. 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. Each hydrologic unit is identified by a unique hydrologic unit code huc consisting of two to eight digits based on the four levels of classification in the hydrologic unit system. The huc boundaries are a subdivision of the us made by the us geological survey to show major and minor river basins. 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. This data set consists of georeferenced digital data and associated attributes created in accordance with the federal guidelines, requirements, and procedures for the. Nwis daily streamflow data for major rivers in middle north canadian huc 11100301. Realtime streamflow map for the ohio region huc 05. Huc 4, huc 8, and huc 12 the watershed boundary dataset wbd maps the full areal extent of surface water drainage for the u. Wbd huc 8, 10, 12 polygons and wbd lines are available on the gateway. This is the exact version of the huc12 boundaries used in wsio indicator compilation, offered here because huc12 boundaries available through other sites sometimes undergo minor revisions without notice.
Federal standards and procedures for the national watershed boundary dataset wbd by the u. Usgs waterwatch realtime floods and high flow conditions map for the ohio region huc 05. Water resources of the united statesnational water. A number of states have digitized basin boundaries at similar densities. The wbd redefined the 8digit hydrologic unit boundaries and further subdivided the 8digit hydrologic units into 10 and 12digit hydrologic units. Locate your watershed mapping interface for science in your watershed of the u. Empirical methods for determining sideslipped boundary stresses at. The modflow2005 framework uses a modular design that allows for the easy development and incorporation of new features called processes and packages that work with or modify inputs. Geological survey and partnering organizations are celebrating the 150th anniversary of the powell expedition, an exploration of the green and colorado rivers that ended in the grand canyon. Base compiled by usgs copies available from the office of water data coordination, u. Usgs watershed boundary dataset wbd for 2digit hydrologic. Geological survey 24000 paper unknown publication date nhd gis coverage used for reference in watershed boundary delineation the original hydrologic unit boundaries were handdigitized on a tablet from the usgs 7. 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.
At a minimum, the wbd is being delineated and georeferenced to the usgs 1. The national hydrography dataset is available by the following extent. For sale by the books and openfile reports section, u. Watersheds are delineated by usgs using a nationwide system based on surface hydrologic features. A hydrologic unit hu represents all or some portion of the areal extent of surface water drainage to a selected stream outlet. The national map download application and the access national hydrography products page use the cloud to access products for download. Geological survey, 417 national center, reston, va. A hydrologic unit is a drainage area delineated to nest in a multilevel, hierarchical drainage system. 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. Usa watershed boundary dataset huc 2, 4, 6, 8, 10, 12 gcpo lcc. Kansashucboundaries mapserver university of kansas. We follow a hierarchial drainage classification system developed by the usgs. 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. Nwis realtime streamflow stations grouped by county in mimbres huc 30202.
Usa watershed boundary dataset huc 2, 4, 6, 8, 10, 12. Nwis daily streamflow data for major rivers in mimbres huc 30202. 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. This list of water resources mission area publications includes both official usgs publications and journal articles authored by our scientists. The following is extracted from usda, nrcs metadata this data set is a complete digital hydrologic unit boundary layer to the watershed 10digit 5th level for the nrcs business areas in and around the state of indiana. Site characteristic data consist of usgs stream gage identifiers, site names, drainage area, ecoregions, hydrologic unit code huc watershed boundaries, streamflow exceedances, and selected information on upstream basin characteristics. The layer also includes delineations at the watershed 10digit and subbasin 8digit levels. Effect of climate and land cover changes on watershed runoff. Geological survey s usgs modular groundwater flow model modflow2005 is a computer program that simulates groundwater flow by using finite differences. Use choices below to search by address, xy longitude and latitude or by hydrologic unit name, code or number. Information about hydrologic units and the watershed.
Hu 2s have a 2digit huc and are the largest wbd unit. August 1, 2018 the watershed boundary dataset wbd from the national map tnm defines the perimeter of drainage areas formed by the terrain and other landscape characteristics. This dataset named the watershed boundary dataset further divides the huc levels to 5th and 6th levels. The watershed and subwatershed hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. Often referred to as quadrangle maps, or quads, the most commonly used usgs topo maps have a scale of 1. This document establishes federal standards and procedures for creating the wbd as seamless and hierarchical hydrologic unit data, based on topographic and hydrologic features. Huc 11 boundaries huc 4 boundaries designated by color 0205, susquehanna river 0206, eastern and upper western shore 0207, potomac river 0208, james river 0208, york river 0208, rappahannock river chesapeake bay watershed state boundary chesapeake bay data sources. The usgs watershed boundary dataset wbd defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Ca usgs watershed boundary dataset 12digit hydrologic.
Environmental protection agency, usda forest service, and other federal, state and local partners. The dataset is seamless and, for the most part, a nationally consistant geospatial database. Each hydrologic unit is labeled with its 2digit huc. Usdanrcs, the united states geological survey usgs, and the environmental protection agency epa. Subwatersheds are noted by a 14digit hydrologic unit huc. The hydrologic units framework dataset is also known as the watershed boundary dataset wbd. A searchable database of all usgs publications can be accessed at the usgs publications warehouse. More specifically, a hydrologic unit defines the areal extent of surface water drainage to an outlet point on a dendritic stream. Watersheds, hydrologic units, hydrologic unit codes. The hydrologic units are arranged or nested within each other, from the largest geographic area regions to the smallest geographic area cataloging units. Jan, 2017 this map shows information on drainage and hydrography in the form of u. Watershed boundary dataset wbd 12digit huc, level 6. Watershed boundaries are defined for hydrologic unit code huc 8 of the united states geological service usgs at a 1.
This dataset is a digital hydrologic unit boundary layer that is at the subwatershed 12digit level. A geographic area of land, water and biota within the confines of a drainage divide. The huc describes where the unit is in the country and the level of the unit. Beyond basic r mapping water data for the nation blog. This data set is a complete digital hydrologic unit boundary layer to the subwatershed 12digit 6th level for the state of florida. Origins of wbd project 2007 epa usgs nrcs determine national watershed update will move to a 6th level level huc 12. The watershed boundary dataset wbd defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. At the national level, a less dense 12digit huc basin boundary data layer is being developed by usdas natural resources conservation service nrcs and usgs as the watershed boundary datalayer wbd, but is not yet available for most of the country as of 42002. 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. Nwis realtime streamflow stations grouped by county in middle north canadian huc 11100301. Chapter 3 of section a, federal standards, book 11. This map is required for successful participation in the course. The discrepancies in the hydrologic unit codes and some boundaries in the state of california are due to the fact that the california state hydrologic unit map hum was revised in.
This data set consists of georeferenced digital data and associated attributes created in accordance with the federal guidelines, requirements, and. Locate your watershed by huc mapping interface usgs home contact usgs search usgs. Wsio geodatabase with hydrologic unit code huc12 polygons. The intent of defining hus is to establish a baseline, hierarchical drainage area framework that can be used for analysis and reporting of water resources information. The document federal standards and procedures for the national watershed boundary dataset wbd can be found here. The data is currently updated through the usgs national hydrography dataset nhd program and replicated to nrcs twice per year. 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. Conterminous us watershed hydrologic unit code huc12 and huc8 boundary layers. The hydrologic units dataset is a digital model of several nested levels of hydrologic unit boundaries and it provides a uniquelyidentified and uniform method of subdividing large drainage areas. A hydrologic unit has a single flow outlet except in coastal or lakefront areas. Data queries and maps at this website present distributions according to drainage in an effort to correlate aquatic species locality data with natural drainage systems as opposed to arbitrary state and county boundaries. Each basin is identified by a unique hydrologic unit code huc, as well a name, at each level. Hydrologic units through four levels were created in the 1970s and have been used extensively throughout the united states. The watershed boundary dataset wbd is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution.
Usgs hydrologic unit map publications alaska division of. Find more information on the powell expedition here. Geological surveys standard map series called state hydrologic unit maps and presents the codes, names, and boundaries of hydro. Watershed boundaries are determined solely upon sciencebased hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. Click here to return to usgs publications hydrologic unit maps. Most hydrologic units have one outflow point where water exits and flows into a neighboring unit, or, in coastal areas, into the ocean. Notice data downloads have migrated to the cloudthe usgs has transitioned from distributing staged products via ftp to hosting staged products in the cloud. Department of agriculture, natural resources conservation service techniques and methods 11a3 fourth edition, 20 chapter 3 of section a, federal standards book 11, collection and delineation of spatial data. 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. Description this data set is a complete digital hydrologic unit boundary layer of the subbasin 8digit 4th level for the entire united states.
Polygons are attributed with hydrologic unit codes, name, and size. Hydrologic unit boundaries define the aerial extent of surface water drainage to a point. Data derived from usgs huc 11 divisions as modified by the chesapeake bay program. Both dataretrieval and sbtools are covered in our usgs packages curriculum. Actual hydrologic units often extend beyond the state and county boundaries. Cataloging units are noted by a 8digit hydrologic unit. There are 2, 4, 6, and 8digit huc boundaries, where the larger the number the smaller the area.
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