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Geo-referenced orthophotographs of the Snow River, Alaska, acquired September 1, 2018 This data release consists of orthophotographs of the Snow River in Alaska acquired on September 1, 2018. The orthophotographs were produced from images obtained using a Hasselblad A6D-100C 100 megapixel digital mapping camera deployed within a pod mounted on the landing gear of a Robinson R44 helicopter. Images were acquired as the helicopter transited a series of flight lines designed to provide complete coverage, with ample overlap, of the study area along the Snow River. Also within the pod was an ATLANS GPS/Inertial Motion Unit (IMU) that recorded the position and orientation of the platform during the flight. This information was used to geo-reference the images by performing aerial triangulation and bundle... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geomorphology, USGS Science Data Catalog (SDC), Water Resources Field measurements of flow depth and optical image sequences acquired from the Salcha River, Alaska, on July 25, 2019 This data release includes field measurements of flow depth and optical image sequences acquired from the Salcha River in Alaska on July 25, 2019. These data were used to develop and test a spectrally based remote sensing technique for estimating water depth from passive optical image data. The purpose of this study was to assess the feasibility of inferring water depths from optical image sequences acquired from a helicopter hovering above the river by averaging the images over time and then establishing a correlation between a spectral band ratio and field measurements of depth, and to develop a modular workflow for performing this type of analysis. Remote sensing of river bathymetry (depth) could provide a... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Acoustic Doppler Current Profiler (ADCP), Alaska, Bathymetry, Depth, Fairbanks, All tags... Geomorphology, Hydrology, Image, Remote Sensing, Remote sensing, River, Salcha River, USGS Science Data Catalog (SDC), Video, Water Resources, Fewer tags Field measurements of flow velocity and optical image sequences acquired from the Salcha and Tanana Rivers in Alaska in 2018 and 2019 and used for particle image velocimetry (PIV) This data release includes field measurements of flow velocity and optical image sequences used to derive remotely sensed estimates of surface flow velocities via particle image velocimetry (PIV) from two rivers in Alaska. These data were acquired from the Salcha River on August 31, 2018, and the Tanana River on July 24, 2019. The purpose of this study was to assess the feasibility of inferring flow velocities from optical image sequences acquired from a helicopter hovering above each river by tracking water surface features via various PIV algorithms and to develop a modular workflow for performing this type of analysis. Remote sensing of flow velocity could provide a more efficient, cost-effective alternative... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Acoustic Doppler Current Profiler (ADCP), Alaska, Fairbanks, Geomorphology, Hydrology, All tags... Particle Image Velocimetry (PIV), Remote Sensing, Remote sensing, River, Salcha River, Tanana River, USGS Science Data Catalog (SDC), Water Resources, flow velocity, helicopter, image, video, Fewer tags Satellite video and individual image frames from the Tanana River, Alaska, July 14, 2020, for Particle Image Velocimetry This data release consists of a video and individual image frames extracted from the original high frame rate video and used to derive remotely sensed estimates of surface flow velocity via particle image velocimetry (PIV). These data were acquired from the Tanana River near Nenana, Alaska, on July 14, 2020. The video was obtained from a satellite operated by Planet Labs as part of the SkySat constellation. The original video was recorded at 30 frames per second and is provided in a compressed, lower-resolution .mp4 format video file for viewing. In addition, Planet Labs provided the individual frames comprising the video as full resolution TIFF images. This data release consists of individual frames extracted... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Image sequence, Nenana, Particle Image Velocimetry (PIV), Remote sensing, All tags... Satellite, Tanana River, Video, surface flow velocity, Fewer tags Acoustic Doppler current profiler (ADCP) measurements of flow depth and velocity from the Blue River, Colorado, October 18, 2018 Field measurements of flow depth and velocity and river discharge were collected from two cross-sections on the Blue River in Colorado using an acoustic Doppler current profiler (ADCP). These data were used to assess the accuracy of surface flow velocities inferred from thermal image time series, acquired from an unmanned aircraft system (UAS), via particle image velocimetry (PIV). These data sets were collected to support research focused on developing innovative methods for non-contact measurement of river discharge based on various forms of remotely sensed data. The ADCP data were collected with a SonTek RiverSurveyor S5 mounted on a hydroboard towed behind an inflatable kayak. Four passes were made across... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Blue River, Colorado, Remote sensing, River discharge, acoustic Doppler current profiler, All tags... bathymetry, flow velocity, Fewer tags Remotely sensed data and field measurements of water depth and percent cover of benthic algae from two reaches of the Buffalo National River in Arkansas acquired in August and September 2021 This data release includes field measurements and remotely sensed data from two reaches of the Buffalo National River in northern Arkansas acquired in August and September of 2021 to support research on remote sensing of benthic algae from aerial photographs and satellite images. This landing page has links to child items where each type of data can be accessed: Field measurements of water depth and percent cover of benthic algae acquired August 24-25, 2021. This ground-based data set was used to calibrate spectrally based models for inferring water depths from passive optical image data, assess the accuracy of image-derived depth estimates, and train classifications of benthic algal coverage. Digital aerial photographs... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Algae, Aquatic Biology, Arkansas, Bathymetry, Benthic, All tags... Buffalo National River, Buffalo River, Depth, Geomorphology, Gilbert, Harmful Algal Blooms (HABs), Hydrology, Maumee, Remote Sensing, Remote sensing, River, Submerged Aquatic Vegetation, USGS Science Data Catalog (SDC), Water Quality, Water Resources, Fewer tags Wading surveys of bed topography and water depth from the Blue River, Colorado, October 18, 2018 Field-based real-time kinematic (RTK) GNSS surveys of water surface elevation and channel bed topography were collected along the Blue River, focusing on two cross-sections from which remotely sensed data were obtained. These data were used to assess the accuracy of river bed elevations inferred from the ASTRALiTe bathymetric lidar, acquired from an unmanned aircraft system (UAS). These data sets were collected to support research focused on developing innovative methods for non-contact measurement of river discharge based on various forms of remotely sensed data. The RTK GNSS surveys were performed using a local base station and Trimble R8 and R10 receivers while wading the channel at each cross-section. Additional... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Blue River, Colorado, bathymetry, depth, remote sensing, All tags... river discharge, topographic survey, Fewer tags Bathymetric lidar data from the Blue River, Colorado, October 18, 2018 The U.S. Geological Survey contracted with Juniper Unmanned to conduct field tests of the ASTRALiTe bathymetric lidar system on the Blue River just upstream of its confluence with the Colorado River near Kremmling, Colorado, on October 18, 2018. The objective of this project was to assess the potential to map river bathymetry (i.e., channel bed topography) using lidar data collected from an unmanned aircraft system (UAS). The ASTRALiTe lidar instrument was mounted on a DJI Matrice 600 Pro UAS owned and operated by Juniper Unmanned. As part of the study, Juniper's pilot flew the ASTRALiTe instrument across 2 river transects (cross-stream) on the Blue River. This data release includes data delivered to the USGS by... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Blue River, Colorado, UAS, Unmanned Aircraft System, bathymetric lidar, All tags... bathymetry, depth, lidar, remote sensing, river discharge, sUAS, Fewer tags UAS-based remotely sensed data and field measurements of flow depth and velocity from the Blue River, Colorado, October 18, 2018 To suport an investigation of the feasibility of measuring river discharge using remotely sensed data acquired from an unmanned aircraft system (UAS), several types of remotely sensed data and field measurements were collected from two cross-sections on the Blue River in Colorado, just upstream of its confluence with the upper Colorado River, on October 18, 2018. This parent data release includes links to child pages for the following data sets: 1) Lidar data used for mapping channel bathymetry (depth), acquired with a novel instrument that was developed by ASTRALiTe to distinguish between returns from the water surface and riverbed based on the polarization of laser pulses. 2) Thermal image time series used to... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry, Blue River, Colorado, Geomorphology, Hydrology, All tags... Remote Sensing, Remote sensing, River discharge, Thermal image, UAS, USGS Science Data Catalog (SDC), Unmanned Aircraft System, Water Resources, acoustic Doppler current profiler, flow velocity, lidar, particle image velocimetry (PIV), sUAS, Fewer tags Remotely sensed data and field measurements for mapping visible dye concentrations during a tracer experiment on the Missouri River near Columbia, MO, May 5, 2021 This data release includes field spectra, UAS-based RGB videos, and digital orthophotography acquired from a manned fixed-wing aircraft, as well as in situ measurements of turbidity and Rhodamine WT dye concentration acquired during a tracer experiment performed on the Missouri River near Columbia, Missouri, on May 5, 2021. One of the primary goals of this tracer experiment was to assess the feasibility of inferring concentrations of a visible dye (Rhodamine WT) from various types of remotely sensed data in a large, highly turbid natural river channel. Previous research on remote sensing of tracer dye concentrations has focused on clear-flowing streams, but the Missouri River is much more turbid. As a result,... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Columbia, Ecology, Geomorphology, Hydrology, All tags... Missouri, Missouri River, Orthophotography, Remote Sensing, Remote sensing, USGS Science Data Catalog (SDC), Water Resources, concentration, dispersion, field spectra, pallid sturgeon, rhodamine dye, river, tracer study, unmanned aerial systems (UAS), Fewer tags Field measurements of water depth from the Colorado River near Lees Ferry, AZ, March 16-18, 2021 Field measurements of water depth were acquired from a reach of the Colorado River near Lees Ferry, Arizona, March16-18, 2021, to support research on remote sensing of water depth from satellite images. The depth measurements included in this data release were obtained along a series of cross-sections using a SonTek RiverSurveyor M9 acoustic Doppler current profiler (ADCP) deployed from a boat. The spatial location of each measurement was obtained using a differential GPS included as part of the RiverSurveyor M9 ADCP instrument package. The map projection and datum for these data are UTM Zone 12S and WGS84, respectively. The USGS Qrev software program was used to ingest and process the raw ADCP data. The Qrev data... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arizona, Bathymetry, Colorado River, Depth, Geomorphology, All tags... Hydrology, Lees Ferry, Remote Sensing, Remote sensing, River, USGS Science Data Catalog (SDC), Water Resources, Fewer tags Sediment grain size measurements from the upper Merced and Tuolumne Rivers in California Field measurements of riverbed grain size were collected from the Merced and Tuolumne Rivers in California to support research on anadromous salmonids. The grain size estimates included in this dataset were obtained from plan-view digital images of grains on exposed gravel and cobble bars (n = 109 for the Merced, n = 26 for the Tuolumne). The images were used to estimate grain-size distributions using the algorithm of Buscombe (2013). In this dataset we report the median grain size (D50), the 16th percentile (D16) and 84th percentile (D84). The spatial location of each measurement was obtained via a Trimble R10 RTK GPS receiver. The map projection and datum for these data from the Merced River are UTM Zone 11 N... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: California, California, Merced River, Steelhead, Tuolumne River, All tags... salmonid, sediment grain size, spawning habitat, spring-run Chinook Salmon, Fewer tags Helicopter-based videos and field measurements of flow depth and velocity from the Tanana River, Alaska, acquired on July 24, 2019 This data release includes videos acquired from a helicopter and field measurements of flow depth and velocity from the Tanana River near Nenana, Alaska, obtained on July 24, 2019. This parent data release includes links to child pages for two data sets produced during the study: 1. Acoustic Doppler Current Profiler (ADCP) field measurements of flow depth and velocity from the Tanana River, Alaska, collected on July 24, 2019. 2. Videos of the Tanana River, Alaska, acquired from a helicopter on July 24, 2019. Please refer to the individual child pages for further detail about each data set. Overall, these data were used to assess the potential to estimate surface flow velocities and water depths in sediment-laden... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Acoustic Doppler Current Profiler (ADCP), Alaska, Geomorphology, Hydrology, Nenana, All tags... Particle Image Velocimetry (PIV), Remote Sensing, Tanana River, USGS Science Data Catalog (SDC), Water Resources, depth, flow velocity, helicopter, image, remote sensing, river, video, Fewer tags Geo-referenced orthophotos of the Tanana River, Alaska, acquired July 24, 2019 This data release consists of an orthophoto of the Tanana River in Alaska acquired on July 24, 2019. The orthophoto was produced from images obtained using a Hasselblad A6D-100C 100 megapixel digital mapping camera deployed within a pod mounted on the landing gear of a Robinson R44 helicopter. Images were acquired as the helicopter transited a series of flight lines designed to provide complete coverage, with ample overlap, of the study area along the Tanana River. Also within the pod was an ATLANS GPS/Inertial Motion Unit (IMU) that recorded the position and orientation of the platform during the flight. This information was used to geo-reference the images by performing aerial triangulation and bundle adjustment... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: Alaska, Geo-referencing, Image, Nenana, Orthophotography, All tags... Remote sensing, River, Surface flow velocity, Tanana River, Fewer tags Satellite video and field measurements of flow velocity acquired from the Tanana River in Alaska and used for particle image velocimetry (PIV) This data release includes a video acquired from a satellite and field measurements of flow velocity from the Tanana River in Alaska that were used to derive remotely sensed estimates of surface flow velocities via particle image velocimetry (PIV). The field data were collected on July 24, 2019, in cooperation with the USGS Alaska Science Center, and the satellite video was obtained on July 14, 2020. The purpose of this study was to assess the feasibility of inferring flow velocities from video acquired from a satellite in orbit above the river by tracking water surface features via a Particle Image Velocimetry (PIV) algorithm. Remote sensing of flow velocity could provide a more efficient, cost-effective alternative... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Acoustic Doppler Current Profiler (ADCP), Alaska, Geomorphology, Hydrology, Image, All tags... Nenana, Particle Image Velocimetry (PIV), Remote Sensing, Remote sensing, River, Satellite, Tanana River, USGS Science Data Catalog (SDC), Video, Water Resources, surface flow velocity, Fewer tags Topographic LiDAR surveys of rivers in Alaska, July 24-26, 2019 The U.S. Geological Survey in collaboration with the U.S. Army Corps of Engineers Cold Regions Research and Engineering Laboratory (CRREL) collected topographic LiDAR surveys of four rivers in Alaska from July 24-26, 2019 to support research related to remote sensing of river discharge. Data were acquired for the Matanuska, Chena, Salcha, and Tanana Rivers using a Riegl VQ-580 LiDAR. The LiDAR was installed on a Robinson R44 Raven helicopter in a HeliPod that was designed and operated by CRREL. The LiDAR data included as part of this release include: a bare earth digital elevation model (DEM) in GeoTiff format and lidar point files in laz format for each river surveyed. Additionally, CRREL reports for each river... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Chena River, Matanuska River, Remote Sensing, Salcha River, All tags... Tanana River, USGS Science Data Catalog (SDC), lidar, river, large river systems, Fewer tags Aerial photographs from the Yampa and Little Snake Rivers in northwest Colorado used to characterize channel changes occurring between 1954 and 1961 Aerial photographs of the Yampa and Little Snake Rivers acquired in 1954 and 1961 were used to examine channel changes occurring along these two rivers during this time period. In addition, these data were used to develop and test a generalizable new approach to characterizing the uncertainty associated with analyses of channel change based on time series of remotely sensed data, which we term the Spatially Distributed Probabilistic (SDP) method. This technique accounts for errors introduced during: 1) image co-registration and geo-referencing; 2) interpreting the location of the channel boundary; and 3) digitizing the channel boundary. The method provides a probability distribution of channel locations and can... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Channel change, Colorado (CO), Deerlodge, Geo-referencing, Geomorphology, All tags... Little Snake River, Remote Sensing, Remote sensing, River, USGS Science Data Catalog (SDC), Uncertainty, Yampa River, aerial photographs, Fewer tags Topographic and sediment grain size data used to evaluate potential habitat for anadromous salmonids on the upper Merced and Tuolumne Rivers in California This data release includes various data sets used to quantify the capacity of two rivers, the Merced and Tuolumne, in the Sierra Nevada of California for reintroduction of two species of anadromous salmonids, Steelhead and spring-run Chinook Salmon. The child pages linked below provide access to the following data sets: Topo-bathymetric digital elevation models of the river channels and adjacent floodplains produced by fusing lidar topography of dry areas with information on water depth derived from hyperspectral images. Sediment grain size measurements at distinct points along each river derived from close-range photographs of bar surfaces. Together, these data sets were used to model the suitability of the... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, California, Geomorphology, Hydrology, Merced River, All tags... Remote Sensing, Sierra Nevada, Tuolumne River, USGS Science Data Catalog (SDC), Water Resources, Fewer tags Phytoplankton identification and biovolume data for field samples from Detroit Lake, Oregon, collected in August 2019 and August 2020 This dataset contains taxonomic and biovolume data for phytoplankton sampled from Detroit Lake, OR, in August, 2019, and August, 2020. Taxonomy is reported to the lowest possible taxonomic level along with total and percent biovolume. Surface grab samples for phytoplankton enumeration were collected with a van Dorn type sampler and then transferred into a clearn polycarbonate churn. Whole water samples were dispensed for total nutrients and phytoplankton identification and enumeration, the latter preserved with 1 percent Lugol's iodine solution. Samples were analyzed at BSA Environmental Services in Beachwood, Ohio. Cell numbers of all identified phytoplankton taxa were quantified on a per milliliter basis using... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Algae, Aquatic Biology, Detroit Lake, Ecology, Environmental Health, All tags... HABs, Lakes, Limnology, Oregon, Phytoplankton, Remote Sensing, Taxonomy, USGS Science Data Catalog (SDC), Water Quality, Water Resources, biovolume, Fewer tags Image data and field measurements used to map salmon spawning locations via remote sensing, American River, California, November 5-7, 2018 This data release includes images and field measurements used to map chinook salmon spawning locations along the American River near Sacramento, California, via remote sensing; the data were collected November 5-7, 2018. The purpose of this study was to develop and test a spectrally based technique for identifying salmon spawning locations, known as redds, from various types of remotely sensed data. Traditionally, redds have been mapped by eye while walking the bank or from a boat, or by an observer in an aircraft or an interpreter visually examining aerial images. The goal of this proof-of-concept investigation was to assess the potential for more efficient, objective, and automated redd mapping from conventional... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: American River, California, Nimbus Dam, Remote sensing, Salmon, All tags... USGS Science Data Catalog (SDC), field spectra, hyperspectral, redd, sUAS, spawning, Fewer tags 1 2 »