759 Works

Per- and polyfluoroalkyl Substances in Drinking Water at Select Public Water Systems in West Virginia, 2022

Mitchell A McAdoo
These data were collected to understand the occurrence of per- and polyfluoroalkyl substances in drinking water samples at public water systems identified to have perfluorooctanoic acid or perfluorooctane sulfonic acid above laboratory reporting levels in previously collected raw-water samples, and provide a review of the analytical results. The West Virginia Department of Health and Human Resources will use this data to determine the potential risk to public health from PFAS contamination in these public water...

Supporting data and model outputs for hydrologic alteration modeling in the Pearl and Pascagoula river basins

Elena R Crowley-Ornelas & Victor L Roland
Anthropogenic hydrologic alteration threatens the health of riverine ecosystems. This study assesses hydrologic alteration in the Pearl and Pascagoula river basins using modeled daily streamflow. Machine learning was used to identify locations that have undergone statistically significant streamflow alteration, quantify the volume of the alteration, and predict alteration using cubist models. Statistically significant alteration was determined by hypothesis testing. The pre- and post-alteration flow duration curves were used to calculate the net change across 60...

Zebra anthrax carcass site pathogen and soil data from Namibia, 2010-2021

Wendy C Turner & Zoe Barandongo
Datasets collected from monitored zebra anthrax carcass sites in Etosha National Park, Namibia, 2010-2021. One data file describes the anthrax mortality, soil characterization of the carcass sites and details on the types and timing of different sampling efforts at these sites. The other data file is counts of Bacillus anthracis spores in surface soils collected annually at these carcass sites.

Hydrogeologic Aquifer Test dataset, Lower Mississippi-Gulf Water Science Center, March 2022

Aaron L Pugh & Douglas A Carlson
Since the 1940's, commercial, academic and government hydrologist have used aquifer test to estimate the hydrogeologic properties near test wells. Results from these tests are recorded in various files, databases, reports and scientific publications. The LMG-Hydrogeologic Test dataset is an attempt to aggregate these dispersed hydrogeologic test results into a single dataset that is publicly available and in a machine readable format.

Assateague Island Seabeach Amaranth Survey Data — 2001 to 2018

Jonathan B Chase, Bill Hulslander, Mark Strum, Chris Lea, Ben Gutierrez, Rachel E Henderson & Travis K Sterne
Seabeach amaranth (Amaranthus pumilus) is a plant species that was once prevalent on beaches of the U.S. mid-Atlantic coast but is now listed as threatened by the U.S. Fish and Wildlife Service. For much of the 20th century, seabeach amaranth was absent from the mid-Atlantic coast and thought to be extinct, presumably as a result of increased development and recreational pressure.� One region where there has been an effort to restore the seabeach amaranth population...

Data release for the 3D petroleum systems model of the Williston Basin, USA

Sarah E Gelman & Benjamin G Johnson
This data release contains data associated with the journal article "Modeling the maturation history of the stacked petroleum systems of the Williston Basin, USA". Collectively, the data release includes 13 child items and metadata files that provide detailed descriptions of the attributes, processing steps, and original data sources. There is also a data table, "Williston_Basin_Data_Release_Overview.csv" that describes how all the child items are linked with one another.

Optical Petrography, Bulk Chemistry, Micro-scale Mineralogy/Chemistry, and Bulk/Micron-Scale Solid-Phase Speciation of Natural and Synthetic Solid Phases Used in Chromium Sequestration and Re-oxidation Experiments with Sand and Sediment from Hinkley, CA

Andrea L Foster, Emily Wright, Callum Bobb, Doug Choy & Laurence G Miller
This data release contains macro and microscale datasets describing the abundance, valence states, and mineral residence(s) of chromium, iron, and manganese in natural and synthetic mineral mixtures used in laboratory experiments designed to simulate dynamic conditions in an engineered aquifer system [see Izbicki and Groover (2018) and Miller and others (2020)]. The landing page contains primary metadata about this release and an overview "sample information" table containing descriptions of samples, their analyses, and their methods...

Mineralogy, strontium (87Sr/86Sr), oxygen (18O/16O) and carbon (13C/12C) isotope composition, elemental concentrations, and U-Th disequilibrium ages for travertine deposits from various locations in Yellowstone National Park, USA

Lauren N. Harrison, Shaul Hurwitz, James B. Paces, Sara Peek, Cathy Whitlock & Joseph Licciardi
Chemical changes in hot springs, as recorded by thermal waters and their mineral deposits, provide a window into the evolution of Yellowstone?s postglacial hydrothermal system. Travertine precipitated from thermal waters provide a record of chemical changes through time because they can be dated using U-series disequilibrium geochronology. These temporal data, along with measured radiogenic 87Sr/86Sr and stable isotope (carbon and oxygen) compositions and elemental concentrations, allow for the investigation of changes in hydrothermal system chemistry...

Catalog of Geospatial Datasets for the USGS Water Quality Program, Proxies Project

Brianna M Williams & Stephanie E Gordon
This application contains metadata for geospatial datasets used across the USGS Water Quality Program Proxies Project. Users can find links to download datasets as well as temporal and spatial resolutions and associated keywords.

A subset of 2017 Louisiana Coastal Master Plan model output to estimate climate change mitigation potential of Louisiana's coastal area

Yushi Wang, Bingqing Liu, Melissa M Baustian, Leland C. Moss, Alyssa M. Dausman & James Pahl
A subset of the Louisiana's 2017 Coastal Master Plan model output was used to estimate the potential climate mitigation role of Louisiana’s coastal area. Model output of surface water salinity, land/water classification, and area of eight habitats for elapsed years of 6, 11, 16, 26, and 36 were post-processed to estimate habitat areas at years of 2020, 2025, 2030, 2040, and 2050, that align with the Governor of Louisiana’s greenhouse gas reduction targets. In addition,...

Hawaiian Islands excess rainfall conditions under current (2002-2012) and future (2090-2099) climate scenarios

Lucas Fortini & Lauren R Kaiser
One of the determinants of runoff is the occurrence of excess rainfall events where rainfall rates exceed the infiltration capacity of soils. To help understand runoff risks, we calculated the probability of excess rainfall events across the Hawaiian landscape by comparing the probability distributions of projected rainfall frequency and land cover-specific infiltration capacity. We characterized soil infiltration capacity based on different land cover types (bare soil, grasses, and woody vegetation) and compared them to the...

30-Year (1990-2019) Annual Average of DAYMET Precipitation and Temperature for North America

Michael E Wieczorek & Richard P Signell
This metadata record describes the 30-year annual average of precipitation in millimeters (mm) and temperature (Celsius) during the period 1990?2019 for North America. The source data were produced by and acquired from DAYMET daily climate data (2020) and presented here as a series of two 1-kilometer resolution GeoTIFF files. An open source python code file used to process the data is also included.

UASmagpy: Python code for compensating rotary-wing sling-load UAS aeromagnetic data

Geoffrey Phelps & Collin Cronkite-Ratcliff

Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2022

John B Storm
The U.S. Geological Survey (USGS) works closely with the Mississippi Department of Transportation (MDOT) to provide information to be used by the MDOT for design of highway-drainage structures. MDOT spends millions of dollars annually for highway construction. Streamflow records, hydrologic analyses of basins, and hydraulic analyses of flooding potential at proposed highway crossings help the MDOT to make more informed decisions on the use of highway construction funding. Flood-frequency and hydraulic characteristics at highway crossings...

The North Delta Routing and Survival Management Tool

Russell W Perry & Adam C Pope
Understanding how routing modifications influence survival of juvenile salmon is complex because reach-specific survival and routing at key river junctions in the North Delta each have a different relationship with river flow. Therefore, to facilitate understanding of how routing modifications at key river junctions influence through-Delta survival, we developed this spreadsheet model to allow managers to explore the potential effects of modifying routing. The purpose is to provide a screening tool that allows managers to...

Evaluation of pore-like features in sedimentary organic matter

Brett J Valentine & Paul C Hackley
Research examining organic-matter hosted porosity has significantly increased during the last ten years due to greater focus on understanding hydrocarbon migration and storage in source-rock reservoirs, and technological advances in scanning electron microscopy (SEM) capabilities. The examination of nanometer-scale organic-matter hosted porosity by SEM requires the preparation of exceptionally flat geologic samples beyond the abilities of traditional mechanical polishing which can deform or otherwise obscure organic surfaces. To meet this demand, broad ion beam (BIB)...

Electrical Resistivity Tomography Data along the Little Colorado River near Leupp, AZ 2019

Jamie P Macy & Jon P Mason
The Little Colorado River alluvial aquifer near Leupp, Arizona was investigated as a possible source of irrigation water for the Leupp and Birdsprings Chapters of the Navajo Nation. The physical, chemical, and hydraulic characteristics of the alluvial aquifer were studied using geophysical surveys, installation of observation wells, water-level measurements, chemical analyses, groundwater pumping simulations, and review of previous investigations. Geophysical surveys and well borings were used to measure the thickness of the aquifer. Geophysical surveys...

Channel geometry for upstream and downstream cross sections at selected bridge sites in Montana, 2022

Stephen R Holnbeck, Seth A Siefken, Sean M Lawlor & Daniel W Armstrong
The U.S. Geological Survey, in cooperation with the Montana Department of Transportation (MDT), collected cross-section data on the upstream and downstream sides at 18 sites involving 20 bridges in Montana during the 2022 calendar year. The purpose of the data collection is to determine if scour and channel instability occur in the vicinity of the bridge structures. Data were processed, analyzed, and compiled for bridge scour monitoring, facilitating better understanding, documentation, and prediction of scour...

Sediment Data From Vibracores and Sand Augers Collected in 2021 and 2022 From Fire Island, New York

Julie C Bernier, Cheyenne S Everhart, Daniel J Ciarletta, Jennifer L Miselis & Nancy T DeWitt
In 2021 and 2022, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) and the USGS New York Water Science Center (NYWSC), on behalf of SPCMSC, conducted sediment sampling and ground penetrating radar (GPR) surveys at Point O' Woods and Ho-Hum Beach (NYWSC, 2021) and Watch Hill, Long Cove, and Smith Point (SPCMSC, 2022), Fire Island, New York. These data complement previous SPCMSC GPR and sediment sampling surveys conducted...

Glacier Waterton International Peace Park bighorn sheep (Ovis canadensis), 2002-2012

Tabitha A Graves, Marie I Tosa, Elizabeth P Flesch & Kimberly A Keating
From 2002 to 2011, 94 bighorn sheep were collared to collect GPS locations for approximately a year.

Dataset from the Upper Mississippi River Restoration Program (1993-2019) to reconstruct missing data by comparing interpolation techniques

Danelle M Larson, Wako Bungula, Amber Lee, Alaina Stockdill, Casey McKean, Frederick Forrest Miller, Killian Davis, Richard A Erickson & Enrika J Hlavacek
The dataset accompanies the scientific article, "Reconstructing missing data by comparing interpolation techniques: applications for long-term water quality data." Missingness is typical in large datasets, but intercomparisons of interpolation methods can alleviate data gaps and common problems associated with missing data. We compared seven popular interpolation methods for predicting missing values in a long-term water quality data set from the upper Mississippi River, USA.�

DataRetrieval.jl

Jayaram A Hariharan
DataRetrieval.jl is a Julia alternative to the R dataRetrieval package for obtaining USGS water data directly from web services.

Inferring pathogen presence when sample misclassification and partial observation occur

Graziella V Direnzo, Evan H Grant, Riley O. Mummah & Brittany A. Mosher
This software contains four separate R scripts and one Matlab script that comprise an analysis to estimate the posterior probability of pathogen presence when sample misclassification and partial observations occur. We develop a Bayesian hierarchal framework that accommodates false negative, false positive, and uncertain detections and apply this framework to a case study of the fungal pathogen Pseudogymnoascus destructans (Pd) identified in Texas bats at the invasion front of white-nose syndrome. The software supports a...

Structure-from-motion derived orthomosaic imagery and digital surface models (DSMs) from the intertidal region at Whale's Tail Marsh, South San Francisco Bay, CA

Joshua Logan, Lukas T Winklerprins & Jessica R Lacy
This data release presents digital surface models (DSMs) and orthomosaic images of the Whale's Tail Marsh region of South San Francisco Bay, CA. The data were created using structure-from-motion (SfM) processing of repeat aerial imagery collected from fixed-wing aircraft. The raw images were acquired from an approximate altitude of 427 meters (1,400 feet) above ground level (AGL), using a Hasselblad A6D-100c camera fitted with an HC 80 lens, resulting in a nominal ground-sample-distance (GSD) of...

Aerial imagery and structure-from-motion data products from a UAS survey of the Los Padres Reservoir delta, Carmel River valley, CA, 2017-11-01

Joshua Logan & Amy East
An unoccupied aerial system (UAS) was used to acquire high-resolution imagery of the exposed reservoir delta at Los Padres Reservoir, in the Carmel River valley in central California on 1 November 2017. This survey followed sediment delivery to the reservoir by the Carmel River due to landscape response after the 2016 Soberanes Fire and high flows in winter 2017. The imagery from this survey was processed using structure-from-motion (SfM) photogrammetric techniques to derive a high-resolution...

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