Filters: partyWithName: William H Farmer (X) > partyWithName: U.S. Geological Survey - ScienceBase (X) > Types: Map Service (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Citation (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts Jennifer C Murphy Lower Mississippi-Gulf Water Science Center Lower Mississippi-Gulf Water Science Center Robert M Hirsch Lori A Sprague Laura A De Cicco Water Resources Categories Data (1) Tag Types Place (1) Theme (1) Harvest Set (1) Tag Schemes None (1) Common geographic areas (1) ISO 19115 Topic Category (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV

Water-quality trends and trend component estimates for the Nation's rivers and streams using Weighted Regressions on Time, Discharge, and Season (WRTDS) models and generalized flow normalization, 1972-2012 Nonstationary streamflow due to environmental and human-induced causes can affect water quality over time, yet these effects are poorly accounted for in water-quality trend models. This data release provides instream water-quality trends and estimates of two components of change, for sites across the Nation previously presented in Oelsner et al. (2017). We used previously calibrated Weighted Regressions on Time, Discharge, and Season (WRTDS) models published in De Cicco et al. (2017) to estimate instream water-quality trends and associated uncertainties with the generalized flow normalization procedure available in EGRET version 3.0 (Hirsch et al., 2018a) and EGRETci version 2.0 (Hirsch et al., 2018b). The procedure... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Contiguous United States and Puerto Rico, USGS Science Data Catalog (SDC), United States, biota, carbon, All tags... concentration, loads (fluxes), major ions, nutrients, rivers, salinity, sediment, streams, surface water quality, water-quality trends, Fewer tags