Filters: Tags: {"type":"USGS Scientific Topic Keyword"} (X) > partyWithName: Jennifer C. Murphy (X) > Categories: Data Release - Revised (X) > partyWithName: Laura A. De Cicco (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Citation (1) Contacts Melissa L. Riskin Office of Planning and Programming Edward G. Stets Gretchen P. Oelsner Henry M. Johnson More... Tags (with Type=USGS Scientific Topic Keyword ) water quality (1) water resources (1) View Results as: JSON ATOM CSV

Water-quality and streamflow datasets used in the Weighted Regressions on Time, Discharge, and Season (WRTDS) models to determine trends in the Nation’s rivers and streams, 1972-2012 In 1991, the U.S. Geological Survey (USGS) began a study of more than 50 major river basins across the Nation as part of the National Water-Quality Assessment (NAWQA) project of the National Water-Quality Program. One of the major goals of the NAWQA project is to determine how water-quality conditions change over time. To support that goal, long-term consistent and comparable monitoring has been conducted on streams and rivers throughout the Nation. Outside of the NAWQA project, the USGS and other Federal, State, and local agencies also have collected long-term water-quality data to support their own assessments of changing water-quality conditions. Data from these multiple sources have been combined to support... Categories: Data Release - Revised; Types: Citation; Tags: National Water Quality Program, Puerto Rico, USGS Science Data Catalog (SDC), United States, WRTDS, All tags... Water Quality, Water Resources, carbon, discharge, nutrients, rivers, salinity, sediment, trends, usgsnawqaswtrends, weighted regression, Fewer tags