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Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Level 3 Ecoregions

Dates

Release Date
2010-01-01
Publication Date

Citation

Wieczorek, M.E. and LaMotte, A.E., 2010, Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Level 3 Ecoregions: U.S. Geological Survey data release, https://doi.org/10.5066/P9GX5O7M.

Summary

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the estimated area of level 3 ecological landscape regions (ecoregions), as defined by Omernik (1987), compiled for every catchment of NHDPlus for the conterminous United States. The source data set is Level III Ecoregions of the Continental United States (U.S. Environmental Protection Agency, 2003). The NHDPlus Version 1.1 is an integrated suite of application-ready geospatial datasets that incorporates many of the best features [...]

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Attached Files

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nhd_eco3_mrb1.zip 3.8 MB application/zip
nhd_eco3_mrb2.zip 8.12 MB application/zip
nhd_eco3_mrb3.zip 8.67 MB application/zip
nhd_eco3_mrb4.zip 8.12 MB application/zip
nhd_eco3_mrb5.zip 6.95 MB application/zip
nhd_eco3_mrb6.zip 6.07 MB application/zip
nhd_eco3_mrb7.zip 4.31 MB application/zip
nhd_eco3_mrb8.zip 2.53 MB application/zip
nhd_eco3.jpg thumbnail 82.29 KB image/jpeg

Purpose

This spatial data set was created and used by the U.S. Geological Survey (USGS) specifically to estimate the area of each level 3 ecoregion per watershed segment in the application of the national SPAtially Referenced Regression On Watershed attributes (SPARROW) model . The SPARROW model relates in-stream water-quality measurements to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and stream transport. The model empirically estimates the origin and fate of contaminants in streams, and quantifies uncertainties in these estimates based on model coefficient error and unexplained variability in the observed data. For more information on the USGS SPARROW model please refer to: https://water.usgs.gov/nawqa/sparrow/intro/intro.html.
Illustration of the dataset
Illustration of the dataset

Map

Communities

  • Model Data Management Function (MDMF)

Tags

Provenance

These data were originally released on the Water Mission Area National Spatial Data Infrastructure Node and were migrated to sciencebase.gov in 2023. These data were released prior to the October 1, 2016 effective date for the USGS's policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release.

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P9GX5O7M

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