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The dataset documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta and Central Delta, in the Sacramento-San Joaquin River Delta of California, USA. The dataset includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, and chlorophyll as well as information about phytoplankton community composition. Data-collection cruises were conducted under four different environmental/flow conditions in June, July, August, and October of 2020. The data release consists of a xml document, text, csv, and shapefiles documents. Descriptions for each document and file are listed below. 1. METADATA:...
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As part of a large-scale study of nitrate contamination on Kirtland Air Force Base in central New Mexico, the USGS collected groundwater and surface water samples for artificial sweetener analyses. Samples were collected following standard USGS procedures (U.S. Geological Survey, variously dated), filtered to 0.45 microns, and frozen until analysis. Artificial sweeteners analyzed include neotame, acesulfame-K, aspartame, saccharin, and sucralose. Of the 49 sites sampled, 17 sites had measurable detections of artificial sweeteners. Neotame was the most commonly detected sweetener (n=12) followed by saccharin (n=5), acesulfame-K (n=2), aspartame (n=1), and sucralose (n=0). Concentrations ranged from 0.0003–0.011 μg/L...
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"The data you have secured from the U.S. Geological Survey (USGS) database identified as National Hydrologic Geospatial Fabric Reference and Derived Hydrofabrics have not received USGS approval and as such are provisional and subject to revision. The data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use." "Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such...
This layer represents fundamentally suitable and unsuitable habitat for freshwater mussels in the Meramec Basin as modeled by these authors on May 17, 2017 based on spatial data ranging from 1990 to 2014. Identification of habitat characteristics associated with the presence of freshwater mussels is challenging but crucial for the conservation of this declining fauna. Most mussel species are found in multi-species assemblages suggesting that physical factors influence presence similarly across species. In lotic environments, geomorphic and hydraulic characteristics appear to be important factors for predicting mussel presence. We used maximum entropy (MaxEnt) modeling to evaluate hydrogeomorphic variables associated...
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Daily streamflow was simulated at 1,331 validation streamgages across the continental United States using both the drainage area ratio (DAR) method and nonlinear spatial interpolation using flow duration curves (QPPQ). Each simulation method was implemented using two index gage selection methods: nearest neighbor (NN) and map correlation (MC), resulting in a total of 4 daily streamflow simulations at each validation streamgage (NNDAR, MCDAR, NNQPPQ, MCQPPQ). Streamflow was simulated for the period of record matching the observed streamflows between September 1, 1980 through September 30, 2013. Empirical 95-percent confidence intervals were computed for daily streamflow estimates for each simulation method. Confidence...
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This record describes a series of raster’s containing mean monthly total nitrogen, ammonium, and nitrate atmospheric wet deposition for the conterminous United States. Wet deposition data were estimated by multiplying published surfaces of atmospheric deposition data (NADP, 2021) with precipitation data (McCabe and Wolock, 2018). See process description for more details. These raster’s have a 4-kilometer resolution and are in USGS Albers 96 projection. Units are in kilograms per square kilometer.
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The U.S. Geological Survey's (USGS) SPAtially Referenced Regression On Watershed attributes (SPARROW) model was used to estimate baseflow changes from historical (1984 - 2012) to thirty-year periods centered around 2030, 2050, and 2080 under warm/wet, median, and hot/dry climatic conditions. SPARROW is a spatially explicit hybrid statistical and process-based model that estimates mean baseflow over the simulation period in streams by linking monitoring data with information on watershed characteristics and baseflow sources, routed through a stream network. This USGS data release includes input and output files associated with SPARROW simulations of baseflow for 10 model runs. Model construction, calibration and...
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The dataset documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta and Central Delta, in the Sacramento-San Joaquin River Delta of California, USA. The dataset includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, and chlorophyll as well as information about phytoplankton community composition. Data-collection cruises were conducted under different environmental/flow conditions in May, July, and October of 2021. The data release consists of a xml document, text, csv, and shapefiles documents. Descriptions for each document and file are listed below. NOTE: Files marked...
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The variation of Love/Rayleigh phase and group velocity was determined for the continental U. S. and adjacent Canada. By processing ambient noise from the broadband channels of the Transportable Array (TA) of USArray and several PASSCAL experiments and using some earthquake recordings, the effort was focused toward determining dispersion down to periods as short as 2s. The relatively short distances between TA stations permitted the use of a 25 km x 25 km grid for the four independent tomographic inversions (Love/Rayleigh and Phase/group velocity). One reason for trying to obtain short period dispersion was to have a data set capable of constraining upper crust velocity models for use in determining regional moment...
The application of two management strategies were tested across nine, Class III, wetland catchments located at the Woodworth Study Area (Stutsman County, ND). This field study took place during 2014 and 2015. 2014 was a pre-treatment year and snow measurements were taken in all experimental catchments in the late February 2015, before treatments were applied. Temporary electric fences were installed surrounding each wetland catchment to exclude them from grazing that took place on the management unit in 2015. All the catchments had been managed in a similar manner since purchased by USFWS in 1964. The primary management strategy of the wetland catchments from 1964–2013 was non-use with occasional prescribed burning....
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This dataset contains scenario based model projections (2001-2100) of land use related water demand for the California Central Coast in support of the published manuscript "Land-Use Change and Future Water Demand in California’s Central Coast" in the journal Land (https://www.mdpi.com/2073-445X/9/9/322). We used a modified version of the USGS's LUCAS model to examine two future scenarios of future land use and associated water use demand, from 2001 to 2100 across 10 Monte Carlo simulations. We examined a range of potential water demand futures sampled from a 24-year record of historical (1992-2016) data to develop two future land change scenarios including a business-as-usual (BAU) scenario which sampled from the...
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A data release containing information on macroinvertebrate communities and sediment toxicity in the Buffalo River Area of Concern (AOC) and reference areas immediately upstream of the AOC collected during 2017 and 2020. Macroinvertebrate community samples were collected using bottom-deployed multiplate artificial substrate samplers and organisms were identified to the lowest practical taxonomic resolution and used to calculate metrics of biological integrity following standard New York State Department of Environmental Conservation procedures. Bed sediments were collected using a petite Ponar dredge and used for toxicity tests with two test species, Chironomus dilutus and Hyalella azteca, following USEPA test methods...
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This data release consists of lakebed temperature data collected at the sediment-water interface at the north end of Haskell Lake, Lac du Flambeau Reservation, Wisconsin. Data were collected using a fiber-optic distributed temperature sensor (DTS) during a 5 day period from July 27 to August 1, 2016. Established procedures were followed to estimate lakebed temperatures from the raw DTS data and calibration baths of known temperatures. This data release includes the raw DTS (Stokes and anti-Stokes intensity) data, a shape file of the DTS cable location, photos from the field deployment, and python code for reproducing the full workflow described as part of U.S. Geological Survey Scientific Investigations Report 2020-5005....
The mission of the U.S. Geological Survey (USGS) involves providing reliable, impartial, and timely information that is needed to understand the Nation’s water resource. New techniques that aid in achieving this mission are important, especially those that allow USGS to do so more accurately or cost-effectively. To this end, a new method for selecting the optimum exposure time for velocity and discharge measurements has been explored. These data were assembled to assist in the development and evaluation of this new method. Four kinds of time-series data are available and used for this purpose. They are: (1) model-derived synthetic velocities, (2) point-velocity measurements in laboratory flumes, (3) point-velocity...
The Machine Learning Asset Aggregation of the PDE (MLAAPDE) is a waveform archive, feature labeled catalog, and Python module that together provide a routine way to gather high-quality input data to train machine learning models. While all the data provided are already publicly available, MLAAPDE packages it in a format that allows a user to prepare input for common machine learning frameworks with few lines of code. Most of the features that are part of the MLAAPDE dataset are selected from the Preliminary Determination of Epicenters (PDE), the official earthquake catalog of the USGS National Earthquake Information Center (NEIC). The PDE aims to provide a complete catalog of source characterization estimates...
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The stable hydrogen (delta2H) and oxygen (delta18O) isotopic compositions of more than 5,900 precipitation samples from nine National Atmospheric Deposition Program (NADP) sites (DE02, MD07, NJ99, NY67, NY68, PA00, PA15, PA72, and PA98), collected over various time periods from as early as 1992, vary, respectively, between -255.6 and +25.5 per mil and between -33.66 and +5.39 per mil.
PAD-US poster maps are available to increase awareness of PAD-US and aid user interpretation. The maps provide a general overview of management, not ownership, as Federal and other designated areas may overlap state, private, and other inholdings. The maps include U.S. States only (not Territories) based on the PAD-US 2.1 Combined Proclamation (Tribal areas and military lands are provided for context), Marine, Fee, Designation, Easement feature class, published by the USGS Science Analytics and Synthesis (SAS), Gap Analysis Project (GAP). The All Managers and Federal Managers maps illustrate the land or marine management agency. The Protection Status map depicts GAP Status Code (a measure of management intent to...


    map background search result map search result map Artificial sweetener results from groundwater and surface water samples collected on Kirtland Air Force Base and the surrounding region Distributed lakebed temperature data, Haskell Lake, Lac du Flambeau Reservation, Wisconsin, July 27 - Aug 1, 2016 Land cover classification training data test outputs for CONUS from 1985 to 2017 Land-Use Change and Future Water Demand in California’s Central Coast - Data Release (2020) Performance metrics for 95- percent confidence intervals of estimated daily streamflow using four transfer-based simulation methods across the continental U.S. Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2020 High-resolution mapping surveys Vegetation and snow depth measurements in grasslands under grazing, burning, and snow fence management near Woodworth, North Dakota (2014-2016) Data for the development of a new method for dynamically estimating exposure time for turbulent flow measurements Niche model results predicting fundamentally suitable and unsuitable habitat for freshwater mussel concentrations in the Meramec Basin Macroinvertebrate community and sediment toxicity data from the Buffalo River Area of Concern, New York (ver. 2.0, September 2021) Short-Period Surface-Wave Tomography in the Continental United States – A Resource for Research Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2021 High-resolution mapping surveys National Hydrologic Geospatial Fabric Reference and Derived Hydrofabrics SPARROW model inputs and simulated future baseflow for streams of the Upper Colorado River Basin Mean monthly ammonium, nitrate, and total nitrogen atmospheric wet deposition for the Conterminous United States, October 2006 through September 2017 Stable hydrogen and oxygen isotopic compositions of precipitation samples from selected Delaware, Maryland, New Jersey, New York, and Pennsylvania National Atmospheric Deposition Program (NADP) sites Distributed lakebed temperature data, Haskell Lake, Lac du Flambeau Reservation, Wisconsin, July 27 - Aug 1, 2016 Vegetation and snow depth measurements in grasslands under grazing, burning, and snow fence management near Woodworth, North Dakota (2014-2016) Macroinvertebrate community and sediment toxicity data from the Buffalo River Area of Concern, New York (ver. 2.0, September 2021) Artificial sweetener results from groundwater and surface water samples collected on Kirtland Air Force Base and the surrounding region Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2020 High-resolution mapping surveys Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2021 High-resolution mapping surveys Niche model results predicting fundamentally suitable and unsuitable habitat for freshwater mussel concentrations in the Meramec Basin Land-Use Change and Future Water Demand in California’s Central Coast - Data Release (2020) Stable hydrogen and oxygen isotopic compositions of precipitation samples from selected Delaware, Maryland, New Jersey, New York, and Pennsylvania National Atmospheric Deposition Program (NADP) sites SPARROW model inputs and simulated future baseflow for streams of the Upper Colorado River Basin Land cover classification training data test outputs for CONUS from 1985 to 2017 Performance metrics for 95- percent confidence intervals of estimated daily streamflow using four transfer-based simulation methods across the continental U.S. Data for the development of a new method for dynamically estimating exposure time for turbulent flow measurements Mean monthly ammonium, nitrate, and total nitrogen atmospheric wet deposition for the Conterminous United States, October 2006 through September 2017 National Hydrologic Geospatial Fabric Reference and Derived Hydrofabrics Short-Period Surface-Wave Tomography in the Continental United States – A Resource for Research