Bronze level automatically awarded US beta

This data has achieved Bronze level on 22 October 2015 which means this data makes a great start at the basics of publishing open data.

Watershed Potential to Contribute Phosphorus from Geologic Materials to Receiving Streams, Conterminous United States

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
16 September 2014
Modified Date
17 November 2014
Update Frequency
notPlanned
Publishers
U.S. Geological Survey, Department of the Interior
Identifier
watershed-potential-to-contribute-phosphorus-from-geologic-materials-to-receiving-streams-conte
Landing Page
http://catalog.data.gov/dataset/watershed-potential-to-contribute-phosphorus-from-geologic-materials-to-receiving-streams-conte

Community verification

Other people can verify whether the answers on this certificate are correct.

This certificate is automatically awarded.

Sign in to verify or report this certificate

Description

This spatial data layer is a cell-based Raster model characterizing the contribution of phosphorus (P) to streams from weathering and erosion of surficial geologic materials for the conterminous United States, and has been created as part of the SPARROW (Spatially Referenced Regressions on Watershed Attributes) water-quality model implementation. SPARROW provides estimates of total nitrogen and phosphorus load in surface waters from point and non-point sources. This data set represents only potential for P contributions, and does not include N. The characterization of contribution of P from geologic materials will help separate the effects of natural or background sources from anthropogenic sources of P, such as from municipal wastewater or agricultural practices. The potential of a watershed to contribute P from naturally occurring geologic materials in the watershed to the adjacent receiving stream is characterized using geochemical data from bed-sediment samples (USGS National Geochemical Survey, National Uranium Resource Evaluation (NURE), Smith 1979) collected from first-order streams in relatively undisturbed watersheds. Bed sediment samples were collected from 1975 through 1980. The bed-sediment phosphorus concentrations (BSPconc) in this data set represent BSPconc in the absence of anthropogenic sources and therefore spatial variation in BSPconc can be used to indicate spatial variation in the potential to contribute naturally occurring P from the geologic materials in the watershed to the stream. A continuous mapped distribution of BSPconc in headwater streams for the conterminous U.S. was prepared by summarizing BSPconc from 50,740 bed-sediment samples by geologic unit using regional-scale geologic map units (GMU's). The GMU's delineate areas with similar lithochemistry based on geologic age as well as ecoregion units. GMU’s were created by combining surficial geology (Hunt, Charles D., 1979) with Level IV Ecoregion units (U.S. Environmental Protection Agency 2011). This data set represents the mean BSPconc value for each GMU. The spatial pattern of BSPconc in headwater streams is offered as a data layer, representing best available information at the regional scale, with the caveat that its performance as a surrogate for contribution of P from watershed geologic materials to in-stream levels of P is weakened by not accounting for variability across headwater streams in the rates of net deposition and processing of P in the streambed.

General Information

Legal Information

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

  • The rights statement is at

    http://catalog.data.gov/dataset/watershed-potential-to-contribute-phosphorus-from-geologic-materials-to-receiving-streams-conte Do you think this data is incorrect? Let us know

  • Outside the US, this data is available under

    Creative Commons CCZero Do you think this data is incorrect? Let us know

  • There are

    yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know

  • The content is available under

    Creative Commons CCZero Do you think this data is incorrect? Let us know

  • This data contains

    no data about individuals Do you think this data is incorrect? Let us know

Practical Information

  • The data appears in this collection

    http://catalog.data.gov/organization/usgs-gov Do you think this data is incorrect? Let us know

  • This data changes

    no Do you think this data is incorrect? Let us know

  • The data is

    backed up offsite Do you think this data is incorrect? Let us know

Technical Information

Social Information

  • The documentation includes machine-readable data for

    title Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    description Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    identifier Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    landing page Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    release frequency Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    publisher Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    distribution(s) Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    release date Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    modification date Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    temporal coverage Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    spatial/geographical coverage Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    release date Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    a URL to access the data Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    a URL to download the dataset Do you think this data is incorrect? Let us know

  • Find out how to contact someone about this data at

    http://catalog.data.gov/dataset/watershed-potential-to-contribute-phosphorus-from-geologic-materials-to-receiving-streams-conte Do you think this data is incorrect? Let us know

  • Find out how to suggest improvements to publication at

    http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/watershed-potential-to-contribute-phosphorus-from-geologic-materials-to-receiving-streams-conte Do you think this data is incorrect? Let us know

Create a certificate

Don't have an account?

Don't worry, you can register later to save your work.

Create an account