Changes in anthropogenic influences on streams and rivers in the conterminous U.S. over the last 40 years, derived for 16 data themes

Metadata Updated: October 10, 2019

This product consists of time-series calculations of anthropogenic characteristics derived for 16 data themes for multiple scales covering the conterminous United States. The characteristics are those which (a) have consistent data sources, and (b) have the potential to affect the water quality of streams and rivers. All 16 data themes are provided for Hydrologic Unit Code level-10 (HUC-10) boundaries (n = 15,458). Additionally, measures of land use and imperviousness are provided for U.S. Environmental Protection Agency (USEPA) Level 4 ecoregions (n = 967) and for U.S. counties (n = 3,109). The data may be scaled up to broader areas; that is, HUC-10 data may be scaled up to HUC-8, 6, 4, or HUC-2 areas, Level 4 ecoregions may be scaled up to Levels 3, 2, and 1, and counties may be scaled up to States or multi-state regions. The 16 broad categories of data are: (1) atmospheric deposition (1985-2012), (2) agricultural production and livestock (1969-2012), (3) land in the Conservation Reserve Program (1986-2014), (4) dams and reservoirs (1972-2013), (5) housing unit density (1970-2010) and population density (1990-2010), (6) imperviousness (1974-2012 and 2001-2011), (7) irrigation (1969-2012 and 2002-2012), (8) land use (1974-2012 and 2001-2011), (9) land use in 200-meter flow distance riparian buffers (1974-2012), (10) nitrogen and phosphorus application from fertilizer (1987-2012), (11) nitrogen and phosphorus application from manure (1982-2012), (12) pesticide application (1992-2012), (13) road salt application (1992-2012), (14) timber and forest cutting (1999-2012), (15) freshwater withdrawal water use (1985-2010), and (16) wastewater treatment plant nitrogen and phosphorus yields (1978-2012). The temporal resolution of the source data vary by dataset, and range from annual to decadal data. The data posted here consist of tabular data and shapefiles to which the data may be joined.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date October 3, 2018
Metadata Created Date October 10, 2019
Metadata Updated Date October 10, 2019
Reference Date(s) January 1, 2018 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from DOI CKAN Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date October 3, 2018
Metadata Created Date October 10, 2019
Metadata Updated Date October 10, 2019
Reference Date(s) January 1, 2018 (publication)
Responsible Party US Geological Survey, National Water Quality project. (Point of Contact)
Contact Email
Access Constraints Use Constraints: Please read use constraints for individual data layers, as applicable., Access Constraints: None. Please see 'Distribution Info' for details.
Bbox East Long -66.879
Bbox North Lat 49.384
Bbox South Lat 24.381
Bbox West Long -124.886
Coupled Resource
Frequency Of Update asNeeded
Harvest Object Id 696f7a82-ddf0-4f08-80b5-f88752769add
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Licence Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 1969-01-01
Temporal Extent End 2014-12-31

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