Filters: Tags: Eutrophication (X) > partyWithName: U.S. Geological Survey - ScienceBase (X) > Types: OGC WFS Layer (X)

Filters Date Range Past year (2) Past month (1) Past week (0) Past day (0) Custom range... To   Search Types Map Service (4) OGC WMS Layer (4) OGC WMS Service (4) Contacts Sarah M Stackpoole Lower Mississippi-Gulf Water Science Center Water Resources U.S. Geological Survey James A Falcone More... Categories Data (4) Tag Types Theme (4) Place (2) USGS Scientific Topic Keyword (4) Harvest Set (4) Tag Schemes None (2) ISO 19115 Topic Category (2) View Results as: JSON ATOM CSV

Regression tree datasets used to identify trophic states in Tennessee reservoirs This dataset was developed in partnership with the Tennessee Department of Environmental Conservation to determine the susceptibility of selected Tennessee reservoirs to eutrophication and potential harmful algal blooms. A R script, based on recursive partitioning and the model-based boosting routine, was used to generate regression trees that grouped Tennessee reservoirs into five endpoints along individual low-to-high gradients of Secchi depth and chlorophyll a concentrations (Green, et al, 2021; Heal and Green, 2021). Input data for these reservoirs were obtained from SPAtially Referenced Regression On Watershed (SPARROW) attributes models that estimate total phosphorus and total nitrogen loads in Tennessee water... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geomorphology, Lakes/Reservoirs, SPARROW, USGS Science Data Catalog (SDC), Water Quality, All tags... Water Resources, agal blooms, eutrophication, nitrogen eutrophication, nutrient content, nutrient loading, Fewer tags Nutrient balances, river loads, and a counterfactual analysis to determine drivers of Mississippi River nitrogen and phosphorus loads from 1975 to 2017 This data release includes data processing scripts, data products, and associated metadata for a study investigating trends in Mississippi River nitrogen and phosphorus loads to the Gulf of Mexico. This data release consists of three main components: 1) Nitrogen and phosphorus balances and accumulation, which account for major nutrient inputs (fertilizer, manure, waste water treatment facility effluent, atmospheric deposition, weathering and nitrogen fixation) and outputs (crop harvest and removal and gaseous emissions of nitrogen). Annual balances and total accumulation are estimated for the entire Mississippi River Basin, which covers 2,887,854 km2 for the time period from 1950 to 2017, 2) Weighted Regression... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Eutrophication, Hypoxia, Legacy Nutrients, Mississippi River Basin, NCCWSC, All tags... National Water Quality Program, Nitrogen, Phosphorus, Surface Water Quality, USGS Science Data Catalog (SDC), Water Quality, Water Quality Trends, Weighted Regression on Time Season and Discharge, Weighted Regressions on Time, Discharge, and Season (WRTDS), counterfactual analysis, inlandWaters, nutrient trends, regression, Fewer tags Nutrient balances, river loads, and a counterfactual analysis to determine drivers of Mississippi River nitrogen and phosphorus loads between 1975 and 2017 Note: this data release has been deprecated. Please find the new verison here: https://doi.org/10.5066/P97TCDQJ. This data release includes data processing scripts, data products, and associated metadata for a study investigating trends in Mississippi River (MR) nitrogen and phosphorus loads to the Gulf of Mexico. This data release consists of three main components: 1) Nitrogen and phosphorus balances, which account for major nutrient inputs (fertilizer, manure, waste water treatment facility effluent, atmospheric deposition, weathering and nitrogen fixation) and outputs (crop harvest and removal and gaseous emissions of nitrogen). Annual balances are estimated for the Mississippi River Basin, which covers 2,887,854... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Eutrophication, Hypoxia, Legacy Nutrients, National Water Quality Program, Nitrogen, All tags... Phosphorus, Surface Water Quality, USGS Science Data Catalog (SDC), Water Quality, Water Quality Trends, Weighted Regressions on Time, Discharge, and Season (WRTDS), biota, Fewer tags Nutrient loading, flushing rate, and lake morphometry data used to identify trophic states in selected watersheds of the eastern and southeastern United States For State agencies and other water-resources managers, determining which waterbodies to allocate limited funds for protection and restoration while also maximizing cost benefit is challenging. This data release contains trophic state designations determined from secchi depth, and concentrations of chlorophyll a and microcystin at 232 lakes and reservoirs having a surface area of greater than 0.1 square kilometer in watersheds that drain to the Atlantic and eastern Gulf of Mexico coasts of the United States and in watersheds within the Tennessee River Basin. Estimates of nutrient loading (nitrogen and phosphorus, Hoos and others, 2013; Moorman and others, 2014) and flushing rates were combined with waterbody morphometry... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alabama, Connecticut, Florida, Georgia, Hydrology, All tags... Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Northeast, Pennsylvania, Phosphorus Loads, Rhode Island, SPARROW, SPAtially Referenced Regressions On Watershed attributes (SPARROW), South Carolina, Southeast, USGS Science Data Catalog (SDC), Vermont, Virginia, Water Quality, Water Resources, West Virginia, algae, blue-green algae, cyanobacteria, eutrophication, harmful algal blooms, microcystin, morphometry, nitrogen eutrophication, nutrient loading, phosphorous, total nitrogen, Fewer tags