Watershed Boundaries, California (10-digit HUC), 2012-2013

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Abstract/Contents

Abstract
This polygon shapefile contains the 5th level, 10 digit hydrologic unit code (HUC) watershed boundaries in California. 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, 10/01/04." These data were developed by digitizing watershed and subwatershed boundary lines using 1:24,000-scale digital raster graphics (DRG), high-resolution digital watershed datasets, a high-resolution National Hydrography Dataset (NHD) at 1:24,000-scale, and 1:250,000-scale draft hydrologic boundary lines. A 30-meter National Elevation Dataset (NED) was used to produce the 1:250,000-scale preliminary draft boundaries, as well as a hillshade layer for additional reference. Some draft catchments (watersheds/subwatersheds) were also created with Watershed Boundary Dataset tools (ArcHydro Tools, Version 9), using the NED for terrain analysis and the NHD for determining stream flow direction. Polygons are attributed with the following: hydrologic unit codes for 5th level watersheds; HU sizes (in acres); states containing the HUs; non-contributing areas; downsteam hydrologic units; 5th and 6th level names; type of HUs (standard, frontal, etc.); flow modifications; and Geographic Names Information System (GNIS) identification numbers. This layer is part of the Watershed Boundary Dataset (WBD): a complete 1:24,000 scale digital hydrologic unit (HU) boundary layer for the 4th level subbasin (8 digit), the 5th level watershed (10 digit), and the 6th level (12-digit) subwatershed for the state of California.
Purpose
The watershed hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. This layer is intended to be used as a tool for water resource management and planning activities, particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. These data are part of a larger, seamless, nationally consistent geospatial database for the watershed boundary dataset.

Description

Type of resource cartographic, software, multimedia
Form Shapefile
Extent 48.145
Place Laramie, WY, US
Publisher Wyoming Geographic Information Sciences Center
Date valid 2000 - 2008
Publication date 2013
Edition 1
Language English
Digital origin born digital
Map data 1:24000Scale not given. ; EPSG::4269 W 124°32ʹ6ʺ--W 113°45ʹ41ʺ/N 42°25ʹ13ʺ--N 32°17ʹ59ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Wyoming Geographic Information Sciences Center

Subjects

Subject Hydrology
Subject Watersheds
Subject California
Subject 2012-2013
Subject Inland Waters
Subject Planning and Cadastral
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information

The definition for a hydrologic unit according to the FGDC Proposal, Version 1.0 - Federal Standards For Delineation of
Hydrologic Unit Boundaries 3/01/02 states “A hydrologic unit is a drainage area delineated to nest in a multi-level,
hierarchical drainage system. Its boundaries are defined by hydrographic and topographic criteria that delineate an
area of land upstream from a specific point on a river, stream or similar surface waters. A hydrologic unit can accept
surface water directly from upstream drainage areas, and indirectly from associated surface areas such as remnant,
non-contributing, and diversions to form a drainage area with single or multiple outlet points. 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. “
WGS84 Cartographics This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location https://purl.stanford.edu/gg725wn2951

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

Wyoming Geographic Information Sciences Center. (2013). Watershed Boundaries, California (10-digit HUC), 2000-2008. Wyoming Geographic Information Sciences Center. Available at: http://purl.stanford.edu/gg725wn2951.

Collection

California Watershed Boundary Dataset

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