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Location Folder Show Tree ROOT ScienceBase Catalog Users Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (2) OGC WFS Layer (2) OGC WMS Layer (2) OGC WMS Service (2) Contacts U.S. Geological Survey - ScienceBase Andrew J Sekellick Water Resources Brianna M Williams South Atlantic Water Science Center More... Categories Data (12) Tag Types Place (13) Theme (13) USGS Scientific Topic Keyword (5) Harvest Set (6) Tag Schemes Geographic Names Information System (GNIS) (5) None (8) ISO 19115 Topic Category (13) Common Geographic Areas (2) Common geographic areas (3) USGS (4) USGS Thesaurus (2) More... View Results as: JSON ATOM CSV Browse Folder

Chloride-specific conductance regression model forms for estimating high-frequency chloride concentrations The file "Chloride_specific_conductance_regression_model_forms_for_estimating_high-frequency_chloride_concentrations.csv" contains the regression equation forms for two types of regressions: 1) single linear (SLR) and 2) piecewise (or segmented; SEG) regression between specific conductance (SC) and chloride (Cl) concentrations for 56 USGS water-quality monitoring stations across the eastern United States, plus four regional regressions developed by pooling data for sites within a region (see Moore and others (in review) for more information). Some sites, and all regions, have both SLR and SEG models reported in this table. The analysis included in the Moore and others (in review) study used results from the SLR... Categories: Data; Tags: Chloride, Deicers, Road salt, Specific conductance, United States, All tags... Urbanization, Water quality, environment, Fewer tags Literature review results and regulatory summaries of freshwater stressors influencing biological impairment in the Chesapeake Bay watershed, USA This data release contains relevant datasets used in the analysis for the Chesapeake Bay stressor identification project, for which results are described in Fanelli and others (2022). For this project, two existing information sources were compiled and summarized to identify key in-stream stressors reported by the scientific literature or through regulatory assessments to be likely affecting benthic macroinvertebrate community metrics in the Chesapeake Bay region: 1) the peer reviewed multi-stressor literature, in which the effects multiple in-stream stressors on benthic macroinvertebrate community metrics are simultaneously assessed; and 2) reported causes of biological impairment as listed by state or district... Categories: Data; Tags: Alabama, Aquatic Biology, Austria, Canada, Chesapeake Bay watershed, All tags... Colorado, Connecticut, Delaware, District of Columbia, Ecology, Environmental Health, Geochemistry, Geomorphology, Georgia, Hydrology, Illinois, Indiana, Land Use Change, Maine, Maryland, Massachusetts, Michigan, Missouri, Nebraska, New Hampshire, New Jersey, New York, New Zealand, North Carolina, Ohio, Oregon, Pennsylvania, Portugal, South Carolina, Spain, Tennessee, Texas, USGS Science Data Catalog (SDC), United Kingdom, United States, Virginia, Washington, Water Quality, Water Resources, West Virginia, Wisconsin, biota, environment, freshwater ecosystems, inlandWaters, water quality, Fewer tags Compilation of multi-agency specific conductance observations for streams within the Chesapeake Bay watershed Freshwater salinization is an emerging issue for freshwater environments in the Chesapeake Bay, USA region. Salinization is often described by measurements of specific conductance (SC). This data release contains specific conductance observations collected by multiple regional agencies for streams within the Chesapeake Bay Watershed. This inventory compiles and harmonizes data from the Water Quality Portal (WQP), which is a data repository developed by the National Water Quality Monitoring Council and supported by the U.S. Environmental Protection Agency and U.S. Geological Survey, and the U.S. Geological Survey National Water Information System (NWIS). Both discrete measures of SC, which are single measures taken... Categories: Data; Tags: Chesapeake Bay watershed, Delaware, District of Columbia, Hydrology, Maryland, All tags... New York, Pennsylvania, USGS Science Data Catalog (SDC), United States, Virginia, Water Quality, Water Resources, West Virginia, biota, environment, freshwater ecosystems, inlandWaters, salinity, surface water quality, Fewer tags Estimated high-frequency chloride concentrations This data set includes estimated chloride concentrations for the 93 USGS water quality monitoring stations located across the eastern United States. Chloride concentrations were predicted using regression equations that established the relationship between simultaneous measurements of chloride and specific conductance (SC). Site-specific models were developed and applied when data were available, and regional regression models were used where there were insufficient data available to establish a site-specific regression model. These models were applied to high-frequency SC data sets to produce high-frequency predicted chloride concentrations at 2-minute to 1-hour intervals, depending on the frequency at which SC... Categories: Data; Tags: Chloride, Road salt, Specific conductance, United States, Urbanization, All tags... Water quality, deicers, environment, Fewer tags Watershed characteristics for selected stream gages This dataset contains climate, road salt application, physical, and land cover characteristics summarized for watersheds upstream of 93 USGS stream gages. Data were summarized by watershed using geographic information system software. The dataset consists of one comma-separated variable table. Categories: Data; Tags: United States, chloride, environment, inlandWaters, specific conductance Stream cross-section, benthic macroinvertebrate and fish taxa counts and abundance, and water chemistry data for the Clarksburg study area in Montgomery County, Maryland, 1992 - 2020 (ver. 1.1, April 2022) Montgomery County, Maryland Department of Environmental Protection has collected datasets to assess the health of streams since the early 1990s. Datasets include geomorphic stream cross-sectional surveys, fish and benthic macroinvertebrate counts and taxa abundance, and water chemistry data collected at the time of benthic and fish sampling (dissolved oxygen, pH, specific conductance, air temperature, and water temperature). Data span years 1992 to 2020 at five watersheds within the Clarksburg study area. Watersheds include a forested reference site (Soper), an urban site with centralized stormwater management (Crystal Rock), and three treatment watersheds (TR104, TR109, and Cabin Branch) within the Clarksburg Special... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clarksburg, Maryland, Montgomery County, Montgomery County, USGS Science Data Catalog (SDC), All tags... Upper Chesapeake Bay, benthic ecosystems, biota, geomorphology, surface water quality, Fewer tags Results from the literature review meta-analysis for the Chesapeake stressor identification project This dataset includes information compiled for the literature review meta-analysis portion for the Chesapeake Bay Stressor Identification Project. The dataset includes basic identifying information regarding the publication (last name of the first author, year published, study type, and number of observational units included in the study), the response metric for which results were reported, and the major source or driver that was the focus of the study. The dataset denotes for each stressor category whether a stressor was measured and whether the study’s analysis found it to be an important factor influencing the response metric. The results are reported for both coarse and fine stressor levels, since two stressor... Categories: Data; Tags: Alabama, Austria, Canada, Chesapeake Bay watershed, Connecticut, All tags... Delaware, Georgia, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Missouri, Nebraska, New Hampshire, New Jersey, New York, New Zealand, North Carolina, Ohio, Pennsylvania, Portugal, South Carolina, Texas, United Kingdom, United States, Virginia, West Virginia, Wisconsin, biota, environment, freshwater ecosystems, inlandWaters, water quality, Fewer tags Multi-stressor literature summary information for Chesapeake Bay stressor identification project This dataset includes summary information on the reports/studies compiled for the literature review portion of the Chesapeake Bay stressor identification project. This dataset includes basic identifying information regarding the report (name of the report, last name of the first author, year published, persistent link to the report, etc.). It also lists the geographic location of the study (U.S. states or countries for those outside the U.S.), the type of field study, the major source or driver that was the focus of the study, and which in-stream stressors were measured. Finally, the dataset includes a decision code to denote whether the study/report results were included in this project’s analysis or not. If not,... Categories: Data; Tags: Alabama, Austria, Canada, Chesapeake Bay watershed, Colorado, All tags... Connecticut, Delaware, Georgia, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Michigan, Missouri, Nebraska, New Hampshire, New Jersey, New York, New Zealand, North Carolina, Ohio, Oregon, Pennsylvania, Portugal, South Carolina, Spain, Tennessee, Texas, United Kingdom, United States, Virginia, Washington, West Virginia, Wisconsin, biota, environment, freshwater ecosystems, inlandWaters, water quality, Fewer tags Input data for chloride-specific conductance regression models This data set includes input data for the development of regression models to predict chloride from specific conductance (SC) data at 56 U. S. Geological Survey water quality monitoring stations in the eastern United States. Each site has 20 or more simultaneous observations of SC and chloride. Data were downloaded from the National Water Information System (NWIS) using the R package dataRetrieval. Datasets for each site were evaluated and outliers were removed prior to the development of the regression model. This file contains only the final input dataset for the regression models. Please refer to Moore and others (in review) for more details. Moore, J., R. Fanelli, and A. Sekellick. In review. High-frequency... Categories: Data; Tags: Chloride, Conductivity, Deicers, Road salt, United States, All tags... Urbanization, Water quality, environment, Fewer tags Stream stage, stream temperature, and climate metrics for 30 streams spanning land use and management gradients in the Shenandoah Valley region of West Virginia and Virginia, 2021 This data release contains summary metrics describing stream stage, stream water temperature, and short-term climate conditions (daily precipitation and air temperature) for 30 streams spanning gradients of forest and pasture land uses and agricultural best management practice implementation in the Shenandoah Valley region of Virginia and West Virginia, USA. This setting is the first of four settings or "typologies" that will be assessed for the USGS Chesapeake Stream Team project. High-frequency stage and water temperature (5-minute data), and air temperature (30-minute data) were measured by the U.S. Geological Survey (USGS) from May 2021 to December 2021 and are available on the USGS National Water Information... Categories: Data; Tags: Aquatic Biology, Chesapeake Bay watershed, Ecology, Hydrology, Land Use Change, All tags... USGS Science Data Catalog (SDC), United States, Virginia, West Virginia, biota, environment, freshwater ecosystems, hydrology, inlandWaters, water temperature, Fewer tags Response variables derived from predicted high-frequency chloride concentrations and specific conductance values This data set contains 18 metrics used to describe patterns in specific conductance (SC) and chloride concentrations in 93 streams located across the eastern United States. These data were quantified for an analysis described in Moore and others (in review). All metrics were quantified for a water year and a median was taken across all years for which data were available to provide a single value for each site. High-frequency SC and chloride were measured or estimated at sub-daily time steps from 2-minute intervals to hourly intervals (e.g., high-frequency) depending on the site. Moore, J., R. Fanelli, and A. Sekellick. In review. High-frequency data reveal deicing salts drive elevated conductivity and chloride... Categories: Data; Tags: Chloride, Conductivity, Deicers, Road salt, Specific conductance, All tags... United States, Urbanization, Water quality, environment, Fewer tags Simulated orthophosphate concentrations as a function of season and flow for 53 monitoring stations in the Chesapeake Bay watershed for the years 2006 and 2014 This data release contains simulated orthophosphate concentrations (milligrams per liter) as a function of year, season, and flow for 53 monitoring stations in the Chesapeake Bay watershed. These data were generated for a study published in Science of the Total Environment. They were extracted from the Weighted Regressions in Time, Discharge and Season (WRTDS; Hirsch et al. 2010) models developed for each monitoring station using two functions in the EGRET R package: the flowDuration function and the plotConcTimeSmooth function. The flowDuration function in the EGRET package (Hirsch and DeCicco, 2015) was used to quantify the 5th and 95th percentile flows to represent low and high flows, respectively, for each season... Categories: Data; Tags: Agriculture, Chesapeake Bay, Land Use Change, Nutrients, Orthophosphate, All tags... Phosphorus, Phosphorus, USGS Science Data Catalog (SDC), Water Quality, Water Resources, biota, water quality, Fewer tags Discrete and high-frequency chloride (Cl) and specific conductance (SC) data sets and Cl-SC regression equations used for analysis of 93 USGS water quality monitoring stations in the eastern United States High frequency estimated chloride (Cl) and observed specific conductance (SC) data sets, along with response variables derived from those data sets, were used in an analysis to quantify the extent to which deicer applications in winter affect water quality in 93 U.S. Geological Survey water quality monitoring stations across the eastern United States. The analysis was documented in the following publication: Moore, J., Fanelli, R.M., and Sekellick, A.J., in review, high frequency data reveal deicing salts drive elevated conductivity and chloride along with pervasive and frequent exceedances of the EPA aquatic life criteria for chloride in urban streams. Submitted to Environmental Science and Technology. This data... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chloride, Deicers, Environmental Health, Hydrology, Land Use Change, All tags... Road salt, Specific conductance, USGS Science Data Catalog (SDC), United States, Urbanization, Water Quality, Water Resources, Water quality, Wildlife Biology, environment, Fewer tags