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Sounding Cross Section Surveys at Alaska Bridge Crossings Sounding Cross Section Surveys at Alaska Bridge Crossings
Since 1993 the U.S. Geological Survey (USGS) has worked with the Alaska Department of Transportation and Public Facilities (ADOT&PF) to provide hydraulic assessments of scour for bridges throughout Alaska. As part of this effort, repeat channel cross section surveys, or channel soundings, have been collected at either the upstream or downstream side of bridges on an annual or as needed...
South Kona, Island of Hawai'i Epizootiology and control of avian malaria (Plasmodium relictum) across an altitudinal gradient 1993-2000 South Kona, Island of Hawai'i Epizootiology and control of avian malaria (Plasmodium relictum) across an altitudinal gradient 1993-2000
This data release includes metadata and tabular data from a field study of avian diseases (malaria and pox virus) that threatened recovery of the last extant population of ‘Alalā (Corvus hawaiiensis) before it went extinct in the wild in the early part of the 21st century. The study focused on habitat occupied by the last remaining wild ‘Alalā and determined prevalence of avian malaria...
Southern Beaufort Sea Polar Bear Fatty Acid Data, Spring Samples 2004-2016 Southern Beaufort Sea Polar Bear Fatty Acid Data, Spring Samples 2004-2016
These data consist of the fatty acid composition (percent of mass) of adipose tissue samples from polar bears in Alaska's southern Beaufort Sea. Fat biopsy samples were collected from polar bears that were either captured or biopsy darted along the north coast of Alaska or on offshore ice during March, April, or May from 2004 to 2016. The data also include an identification code unique...
Spatial Data in Support of the Characterization of Water Resources near the Southeastern Part of Puget Sound, Washington Spatial Data in Support of the Characterization of Water Resources near the Southeastern Part of Puget Sound, Washington
The data within this data release presents information used to characterize the groundwater-flow system and the development of a groundwater-flow model in the active model area. Conceptual and numerical models of groundwater flow were developed by the U.S. Geological Survey Washington Water Science Center, in close cooperation with 18 water-resource agencies and stakeholders, to assess...
Spatial data of artisanal mining riverine dredges using three different Synthetic Aperture Radar detection approaches on the Madeira River, Brazil Spatial data of artisanal mining riverine dredges using three different Synthetic Aperture Radar detection approaches on the Madeira River, Brazil
Three semi-automated detection approaches using Sentinel-1 Synthetic Aperture Radar (SAR) have been performed to identify artisanal and small-scale mining (ASM) riverine dredges on the Madeira River in Brazil. The methods are: i) Search for Unidentified Maritime Objects (SUMO), an established method for large ocean ship detection; and two techniques specifically developed for riverine...
Spatial profiles of waterborne self-potential and water-quality-property data acquired September 8–11, 2023, in Elm and Hartwell Brooks and the Shawsheen River near Hanscom Air Force Base, Bedford, Massachusetts, to identify groundwater seepage locations. Spatial profiles of waterborne self-potential and water-quality-property data acquired September 8–11, 2023, in Elm and Hartwell Brooks and the Shawsheen River near Hanscom Air Force Base, Bedford, Massachusetts, to identify groundwater seepage locations.
This data release contains geophysical and water-quality property data measured by the U.S. Geological Survey (USGS) along downstream continuous profiles in surveyed reaches of Elm Brook, Hartwell Brook, and the Shawsheen River near Hanscom Air Force Base in Bedford, Massachusetts. The geophysical data consist of spatial profiles of waterborne self-potential (WaSP) voltages attributed to...
Spatially Explicit Estimates of Greater Sage-Grouse (Centrocercus urophasianus) Survival, Recruitment, and Rate of Population Change in Nevada, 2013-2021 Spatially Explicit Estimates of Greater Sage-Grouse (Centrocercus urophasianus) Survival, Recruitment, and Rate of Population Change in Nevada, 2013-2021
These data are the results of a spatially interpolated integrated population model (SIIPM) fit to count and demographic data collected from populations of Greater Sage-grouse (Centrocercus urophasianus; hereafter, sage-grouse) located in Nevada, U.S.A. during 2013-2021. We used a novel framework, using integrated population models (IPMs), to express demographic relatedness among sampled...
Species Distribution Models for Pectis imberbis, a Rare Plant Species in Southeastern Arizona Species Distribution Models for Pectis imberbis, a Rare Plant Species in Southeastern Arizona
Species distribution models (SDMs) can be an important tool in rare species conservation. Specifically, SDMs have been used to location previously unknown populations and identify sites for reintroduction or translocation. With these goals in mind, we applied SDM to a recently listed plant species, Pectis imberbis, which is found in the Madrean Archipelago region of southern Arizona, USA...
Specific conductance and fiber-optic distributed temperature sensing data collected at Operable Unit 2, North Chevalier Field Disposal Area (Site 11), Naval Air Station Pensacola, Florida, 2018-2022 Specific conductance and fiber-optic distributed temperature sensing data collected at Operable Unit 2, North Chevalier Field Disposal Area (Site 11), Naval Air Station Pensacola, Florida, 2018-2022
This data release consists of two datasets, each accessible in its own child page, collected at the North Chevalier Field Disposal Area (Site 11) at Naval Air Station Pensacola in Florida. Site 11 is adjacent to Bayou Grande, which empties into Pensacola Bay. The first dataset consists of fiber-optic distributed temperature sensing data collected from March 13-March 16, 2018. The second...
Specific conductance data collected during slug additions Specific conductance data collected during slug additions
Slug additions are often the most accurate method for determining discharge when traditional current meter or acoustic measurements are unreliable because of high turbulence, rocky streambed, shallow or sheet flow, or the stream is physically inaccessible (e.g., under ice or canyon walls) or unsafe to wade (Zellweger et al., 1989, Kilpatrick and Cobb 1984, Ferranti 2015). The slug...
Spectral reflectance data of rock and soil in Prince William Sound, Alaska Spectral reflectance data of rock and soil in Prince William Sound, Alaska
An ASD FieldSpec 4 Hi-Res NG Spectroradiometer was used to collect the reflectance properties of soil and rock in Prince William Sound (Figure 1). Reflectance is a property of the material being observed, being the ratio of the amount of light leaving a target to the amount of light striking the target. Reflectance is a unitless value from 0 to 1, where a value of 0 indicates that the...
Spectral reflectance measurements of standard reference materials in laboratory setting using an Analytical Spectral Devices (ASD) FieldSpec® 4 Hi-Res and Ocean Optics OCEAN-HDX-VIS-NIR® (HDX), suitable for comparison to other spectroradiometer measuremen Spectral reflectance measurements of standard reference materials in laboratory setting using an Analytical Spectral Devices (ASD) FieldSpec® 4 Hi-Res and Ocean Optics OCEAN-HDX-VIS-NIR® (HDX), suitable for comparison to other spectroradiometer measuremen
Two spectroradiometers, a Malvern Panalytical Analytical Spectral Devices FieldSpec® 4 Hi-Res (hereafter referred to as ASD spectrometer) and a high sensitivity spectrometer, OCEAN-HDX-VIS-NIR®, from Ocean Optics (hereafter referred to as HDX) were used to collect reflectance measurements of materials in a controlled indoor setting at the USGS Spectroscopy Lab in Denver, Colorado on July...