Melissa A Lombard

Data used to model and map arsenic concentration exceedances in private wells throughout the conterminous United States for human health studies

This data release contains data used to develop models and maps that estimate the probabilities of exceeding various thresholds of arsenic concentrations in private domestic wells throughout the conterminous United States. Three boosted regression tree (BRT) models were developed separately to estimate the probability of private well arsenic concentrations exceeding 1, 5, and 10 micrograms per liter (µg/L). A random forest (RF) model was developed to estimate the most probable arsenic concentration category (≤5, >5 to ≤10, or >10 µg/L). The models use arsenic concentration data from private domestic wells located throughout the conterminous United States and independent variables that are available as geospatial...

Categories: Data; Tags: Environmental Health, Geochemistry, Hydrology, USGS Science Data Catalog (SDC), United States, All tags... Water Quality, arsenic, drinking water use, environment, environmental health (human), geoscientificInformation, groundwater quality, health, machine learning models, private wells, Fewer tags

Data Layers for the National Hydrologic Model, version 1.1

This U.S. Geological Survey (USGS) metadata release consists of 17 different spatial layers in GeoTIFF format. They are: 1) average water capacity (AWC.zip), 2) percent sand (Sand.zip), 3) percent silt (Silt.zip), 4) percent clay (Clay.zip), 5) soil texture (TEXT_PRMS.zip), 6) land use/land cover (LULC.zip), 7) snow values (Snow.zip), 8) summer rain values (SRain.zip), 9) winter rain values (WRain.zip), 10) leaf presence values (keep.zip), 11) leaf loss values (loss.zip), 12) percent tree canopy (CNPY.zip), 13) percent impervious surface (Imperv.zip), 14) snow depletion curve numbers (Snow.zip), 15) rooting depth (RootDepth.zip), 16) permeability values (Lithology_exp_Konly_Project.zip), and 17) water bodies. All...

Categories: Data; Tags: Canada, average water capacity, boundaries, conterminous United States of America, geographic information systems (GIS), All tags... geoscientificInformation, hydrologic modeling, hydrologic response Units (HRUs), inLandWaters, interception, land cover, leaf loss, leaf presence, percent clay, percent sand, percent silt, Fewer tags

National Hydrologic Model's United States-Canada Transboundary Geospatial Fabric Parameter Database

This metadata record documents a set of 118 comma delimited files and a data dictionary describing the inputs for the U.S. Geological Survey Precipitation Runoff Modeling System (PRMS) which is used to drive the National Hydrologic Model (NHM) for the United States-Canada transboundary domain. The National Hydrologic Model database contains parameters for hydrologic response units (HRUs) and stream segments needed to run the NHM. These parameters are generated using python scripts to process input datasets such as digital elevation models, soil maps, and land cover classifications. Many of the parameters were left at their default model value as they would need to be calibrated as part of the PRMS model development...

Categories: Data; Tags: Canada, National Hydrologic Model, United States, environment, farming, All tags... health, hydrologic parameters, inlandWaters, watershed modeling, Fewer tags

Thermoelectric-power water use reanalysis for the 2008-2020 period by power plant, month, and year for the conterminous United States

Previous work by the U.S. Geological Survey (USGS) developed models to estimate the amount of water that is withdrawn and consumed by thermoelectric power plants (Diehl and others, 2013; Diehl and Harris, 2014; Harris and Diehl, 2019 [full citations listed in srcinfo of the metadata file]). This data release presents a historical reanalysis of thermoelectric water use from 2008 to 2020 and includes monthly and annual water withdrawal and consumption estimates, thermodynamically plausible ranges of minimum and maximum withdrawal and consumption estimates, and associated information for 1,360 water-using, utility-scale thermoelectric power plants in the United States. The term “reanalysis” refers to the process of...

Tags: Hydrology, USA, USGS Science Data Catalog (SDC), Water Resources, hydrology, All tags... power generation water use, water budget, water census, water supply and demand, water use, water-energy nexus, Fewer tags

Concentrations of arsenic in water from public-supply and domestic wells in New Hampshire (2004-2006)

Groundwater samples from public and private drinking water wells throughout the state of New Hampshire were analyzed for total Arsenic (As). Samples were collected after pH, specific conductivity, dissolved oxygen, and water temperature had met stabilization criteria as outlined in the USGS National Field Manual (United States Geological Survey 2005). The As analyses were carried out in the geochemistry laboratory in the Department of Earth Sciences at the University of New Hampshire (UNH). Not including replicate analysis, a total of 527 samples were analyzed via a hydride generator-inductively coupled plasma mass spectrometer (HG-ICP-MS) using a Cetac HGX-200 plumbed into a Nu Instruments Attom high-resolution...

Categories: Data; Tags: Arsenic, Drinking Water, Groundwater, Hydrogeology, New Hampshire, All tags... USGS Science Data Catalog (SDC), Water Quality, Fewer tags