Hydrography of the southern Sierra, USA

Dataset Identification:

Resource Abstract:
This is the flowline feature in the NHD plus dataset for region 18. For full attribute definition, consult the NHD plus user guide. TNC joined the attributes from the tbl_nhd_flowlineattributesflow table in the geodatabase to get all of the relevant attributes. <br /> <br /> The NHDPlus Version 1.0 is an integrated suite of application-ready geospatial data sets that incorporate many of the best features of the National Hydrography Dataset (NHD) and the National Elevation Dataset (NED). The NHDPlus includes a stream network (based on the 1:100,000-scale NHD), improved networking, naming, and &quot;value-added attributes&quot; (VAA's). NHDPlus also includes elevation-derived catchments (drainage areas) produced using a drainage enforcement technique first broadly applied in New England, and thus dubbed &quot;The New-England Method&quot;. This technique involves &quot;burning-in&quot; the 1:100,000-scale NHD and when available building &quot;walls&quot; using the national Watershed Boundary Dataset (WBD). The resulting modified digital elevation model (HydroDEM) is used to produce hydrologic derivatives that agree with the NHD and WBD. An interdisciplinary team from the U. S. Geological Survey (USGS), U.S. Environmental Protection Agency (USEPA), and contractors, over the last two years has found this method to produce the best quality NHD catchments using an automated process. <br /> <br /> The VAAs include greatly enhanced capabilities for upstream and downstream navigation, analysis and modeling. Examples include: retrieve all flowlines (predominantly confluence-to-confluence stream segments) and catchments upstream of a given flowline using queries rather than by slower flowline-by-flowline navigation; retrieve flowlines by stream order; subset a stream level path sorted in hydrologic order for stream profile mapping, analysis and plotting; and, calculate cumulative catchment attributes using streamlined VAA hydrologic sequencing routing attributes. <br /> <br /> The VAAs include results from the use of these cumulative routing techniques, including cumulative drainage areas, precipitation, temperature, and land cover distributions. Several of these cumulative attributes are used to estimate mean annual flow and velocity as part of the VAAs. <br /> <br /> NHDPlus contains a snapshot (2005) of the 1:100,000-scale NHD that has been extensively improved. While these updates will eventually make their way back to the central NHD repository at USGS, this will not have happened prior to distribution of NHDPlus because the update process for the central NHD repository is still in development. Consequently, the NHDPlus will contain some temporary database keys and, as a result, NHDPlus users may not make updates to the NHD portions of NHDPlus with the intent of sending these updates back to the USGS. Once the NHDPlus updates have been posted to the central NHD repository, a fresh copy of the improved data can be downloaded from the central NHD repository and that copy will be usable for data maintenance. Note that the NHDPlus products are tightly integrated and user modifications to the underlying NHD can compromise this synchronization.
Citation
Title Hydrography of the southern Sierra, USA
Original Data Basin Creation Date  Date   2010-07-28
Original Data Basin Modified Date  Date   2011-05-14
Topic Category:  geoscientificInformation
Keywords:
Keywords
nhd
topography
hydrography
reservoir
sparrow
canal / ditch
cartography
national land cover dataset
national elevation dataset
stream velocity
earth science
gis
land cover
national hydrography dataset
ned
swamp / marsh
land surface
stream flow
river coding systems
elevation
hydrologic modeling
reach
artificial path
catchment
spring / seep
stream / river
geodata
lake / pond
usgs
inlandwaters
spatially referenced regressions on watershed attributes
watershed
nlcd
nhdplus
water-quality
streamstats
epa
thesaurus name >
Title Data Basin
revision  Date   2018-06-27
Resource language:  eng
Resource extent
Geographic Extent
Geographic Bounding Box
westBoundLongitude  -119.8621
eastBoundLongitude  -117.8324
northBoundLatitude  37.2632
southBoundLatitude  34.5752
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Resource distribution information

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name ScienceBase Item Summary Page
URL: https://www.sciencebase.gov/catalog/item/537f6c66e4b021317a872678
protocol WWW:LINK-1.0-http--link
link function information
Description Link to the ScienceBase Item Summary page for the item described by this metadata record
target application profile  Web Browser
Linkage for online resource
name Owner Profile Page
URL: http://databasin.org/people/consbio
protocol WWW:LINK-1.0-http--link
link function information
Description Web Link
target application profile  Web Browser

Metadata data stamp:  2014-05-23T15:42:30Z
Metadata Constraints
Constraints
Use limitation statement:
none
Metadata contact - owner
organisation Name  Conservation Biology Institute
Contact information
Metadata scope code  dataset
Metadata language  eng USA
Metadata character set encoding:   utf8
Metadata standard for this record:  ISO19115
standard version:  1.0
Metadata record identifier:  537f6c66e4b021317a872678
URI for dataset described: > https://www.sciencebase.gov/catalog/item/537f6c66e4b021317a872678

Metadata record format is ISO19139 XML (MD_Metadata)