The U.S. Geological Survey (USGS) in cooperation with the State of Arkansas made a bathymetric survey of the Black River from Popular Bluff, Missouri, to Pocahontas, Arkansas from July 12—25, 2018. One hundred sites were surveyed at pre-established transect locations along a 131-mile reach at distances spaced from about 0.1 to 4.8 miles apart. River-channel cross sections were surveyed to determine water depths along each transect using an acoustic Doppler current profiler(ADCP). Positional location of the water-depth locations was obtained from a global positioning system receiver onboard the ADCP. Water-surface elevation at the water-depth locations was computed using vertical control points collected at the location of the cross sections with survey-grade Global Navigation Satellite Systems (GNSS) equipment. Standard methods of practice (Rydlund and Densmore, 2012) were used while obtaining the GNSS control points. Channel cross-section point elevations were obtained by subtracting the water depths along the cross-section transect from the water-surface elevation at the location of the transect. Positional location is reported in World Geodetic System 1984 geographic decimal degree coordinates. Depth is reported in meters and bathymetric elevation is referenced to the North American Vertical Datum of 1988. References Rydlund, P.H., Jr., and Densmore, B.K., 2012, Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey: U.S. Geological Survey Techniques and Methods, book 11, chap. D1, 102 p. with appendixes.

The U.S. Geological Survey (USGS) in cooperation with the Little Rock District, U.S. Army Corps of Engineers conducted a bathymetric survey of the Black River from Clearwater Lake Dam near Piedmont, Missouri, to southern Butler County, Missouri, from June 16-19, 2020, and from June 22-24, 2020. One hundred and eight sites were surveyed at pre-established transect locations along a 45-mile reach at distances spaced from about 0.3 to 2 miles apart. River-channel cross sections were surveyed to determine water depths along each transect using an acoustic Doppler current profiler (ADCP). Positional location of the water-depth locations was obtained from a global positioning system receiver onboard the ADCP. Water-surface elevation at the water-depth locations was computed using vertical control points collected at the location of the cross sections with survey-grade Global Navigation Satellite Systems (GNSS) equipment. Standard methods of practice (Rydlund and Densmore, 2012) were used while obtaining the GNSS control points. Channel cross-section point elevations were obtained by subtracting the water depths along the cross-section transect from the water-surface elevation at the location of the transect. Positional location is reported in World Geodetic System 1984 geographic decimal degree coordinates. Depth is reported in meters and bathymetric elevation is referenced to the North American Vertical Datum of 1988. These data are provided in the Environmental Systems Research Institute (ESRI) shapefile format consisting of a group of files that have been compressed into a zip archive that is named black_river_survey_shapefile.zip. References Rydlund, P.H., Jr., and Densmore, B.K., 2012, Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey: U.S. Geological Survey Techniques and Methods, book 11, chap. D1, 102 p. with appendixes.

The USGS, in cooperation with the Shoshone-Bannock Tribes, surveyed the bathymetry of Blackfoot Reservoir in 2011 to determine temporal changes due to sedimentation and other factors, and to improve the overall accuracy of the stage-capacity table. Bathymetric surveys of high accuracy and resolution are possible through advances in instrumentation, notably a multibeam echosounder (MBES). An MBES coupled with real-time kinematic global positioning systems (RTK-GPS) has advantages over traditional techniques for surveying reservoir bathymetry, such as single-beam echosounders, acoustic Doppler profilers, or soundings, because they can provide more coverage of the reservoir bed and real-time data corrections. The topography (above-water) of the reservoir, which could not be measured with the MBES, was surveyed by Horizons, Inc., in 2000 using terrestrial light detection and ranging (LiDAR), and verified in selected areas by USGS in 2011 using RTK-GPS surveying equipment.

The USGS, in cooperation with the Shoshone-Bannock Tribes, surveyed the bathymetry of Blackfoot Reservoir in 2011 to determine temporal changes due to sedimentation and other factors, and to improve the overall accuracy of the stage-capacity table. Bathymetric surveys of high accuracy and resolution are possible through advances in instrumentation, notably a multibeam echosounder (MBES). An MBES coupled with real-time kinematic global positioning systems (RTK-GPS) has advantages over traditional techniques for surveying reservoir bathymetry, such as single-beam echosounders, acoustic Doppler profilers, or soundings, because they can provide more coverage of the reservoir bed and real-time data corrections. The topography (above-water) of the reservoir, which could not be measured with the MBES, was surveyed by Horizons, Inc., in 2000 using terrestrial light detection and ranging (LiDAR), and verified in selected areas by USGS in 2011 using RTK-GPS surveying equipment.

In August 2024, the U.S. Geological Survey Idaho Water Science Center (USGS IDWSC), in cooperation with the United States Bureau of Reclamation (USBR), completed bathymetric and topographic surveys at Black Canyon Reservoir near Emmett, Idaho using a multibeam sonar and boat-mounted Light Detection and Ranging (LiDAR). The bathymetric and topographic data generally include complete data coverage from Black Canyon Dam to Black Canyon Park with sparse data coverage upstream of Black Canyon Park and data represent conditions on August 19-20, 2024 when the water surface elevation was steady at about 2,497.8 feet (Reclamation Project Vertical Datum). Prior to the bathymetric and topographic surveys, USBR completed aerial surveys using uncrewed aircraft systems to collect aerial imagery and develop elevation models using structure from motion techniques. These aerial surveys were completed on November 28-29, 2023 during a period of reservoir pool drawdown when the water surface elevation was between about 2,461 feet and 2,465.7 feet (Reclamation Project Vertical Datum). While these topographic elevation data provided high-resolution and spatially expansive coverage, the structure from motion technique does not perform well for reconstructing submerged topography. As such, IDWSC was tasked with collecting bathymetric data in areas where elevation data could not be reconstructed from aerial surveys. Collectively, bathymetric data from USGS IDWSC and topographic data from USBR may be used for further improvement of existing reservoir stage-capacity relationships of Black Canyon Reservoir.

On August 25, 2020, the U.S. Geological Survey conducted a bathymetry survey of a 550 meter long reach of the Black River near Great Bend, New York. The study reach began approximately 1,000 meters upstream from the State Route 26 bridge in Great Bend, New York. Depth data were collected primarily with a 1,200 kilohertz Teledyne RD Instruments RioPro acoustic Doppler current profiler (ADCP) with position data from differential global navigation satellite system (GNSS) Hemisphere V102 DGPS antenna (any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government). Water surface elevations were established using real-time kinematic (RTK) GNSS surveys; additional bathymetry points were also measured using RTK-GNSS. Quality assurance of the RTK-GNSS included observations of two documented benchmarks. Files included in this Data Release include shapefiles with detailed attribute tables and accompanying comma-separated values files of ADCP bathymetry points (BlackR_ADCPBeamDepths.shp and .csv), GNSS bathymetry points (BlackR_GNSS_BathyPoints.shp and .csv), and GNSS water surface elevation points (BlackR_GNSS_WSEPoints.shp and.csv), and a comma-separated values file of the GNSS benchmark occupation data (BlackR_GNSS_Benchmarks.csv).

On August 25, 2020, the U.S. Geological Survey conducted a bathymetry survey of a 550 meter long reach of the Black River near Great Bend, New York. The study reach began approximately 1,000 meters upstream from the State Route 26 bridge in Great Bend, New York. Depth data were collected primarily with a 1,200 kilohertz Teledyne RD Instruments RioPro acoustic Doppler current profiler (ADCP) with position data from differential global navigation satellite system (GNSS) Hemisphere V102 DGPS antenna (any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government). Water surface elevations were established using real-time kinematic (RTK) GNSS surveys; additional bathymetry points were also measured using RTK-GNSS. Quality assurance of the RTK-GNSS included observations of two documented benchmarks. Files included in this Data Release include shapefiles with detailed attribute tables and accompanying comma-separated values files of ADCP bathymetry points (BlackR_ADCPBeamDepths.shp and .csv), GNSS bathymetry points (BlackR_GNSS_BathyPoints.shp and .csv), and GNSS water surface elevation points (BlackR_GNSS_WSEPoints.shp and.csv), and a comma-separated values file of the GNSS benchmark occupation data (BlackR_GNSS_Benchmarks.csv).

Bathymetric and topographic surveys were collected along an approximately 5.7-kilometer reach of the Colorado River upstream from the USGS streamgage located near the Colorado River Road (Catamount) bridge. The surveys were collected using real-time kinematic Global Navigation Satellite System (GNSS) receivers by USGS personnel between May 13 through September 9, 2021, using a combination of sonar and wading techniques. The wading surveys include point data that are provided as comma-delimited text files of northing, easting, elevation, and code. The sonar surveys include point data that are provided as comma-delimited text files of northing, easting, bed elevation, water-surface elevation, and depth. All spatial data are referenced horizontally to the North American Datum of 1983 (2011) and vertically to the North American Vertical Datum of 1988 (NAVD88). Grid coordinates are projected in Universal Transverse Mercator Zone 13 North and are represented in units of meters.

Bathymetric and topographic surveys were collected along an approximately 5.7-kilometer reach of the Colorado River upstream from the USGS streamgage located near the Colorado River Road (Catamount) bridge. The surveys were collected using real-time kinematic Global Navigation Satellite System (GNSS) receivers by USGS personnel between May 13 through September 9, 2021, using a combination of sonar and wading techniques. The wading surveys include point data that are provided as comma-delimited text files of northing, easting, elevation, and code. The sonar surveys include point data that are provided as comma-delimited text files of northing, easting, bed elevation, water-surface elevation, and depth. All spatial data are referenced horizontally to the North American Datum of 1983 (2011) and vertically to the North American Vertical Datum of 1988 (NAVD88). Grid coordinates are projected in Universal Transverse Mercator Zone 13 North and are represented in units of meters.

This dataset contains survey data including wading and real-time kinematic (RTK) Global Positioning System (GPS) of water surface elevation and channel bed topography at cross section 5 (xs5) on March 20, 2018, which is adjacent to the U.S. Geological Survey (USGS) streamgage at Arkansas River at Parkdale, Colorado (USGS 07094500). The RTK Global Navigation Satellite System (GNSS) surveys were performed using a local base station associated with the streamgage and Trimble R8 ® and R10 ® receivers while wading the channel at xs5. The survey data were post-processed by performing the National Oceanic and Atmopheric Administration Online Positioning User Service (OPUS) correction of the static observations collected by the base and adjusting all the survey points accordingly. The survey data were exported to comma separated text (.csv) files, and the resulting file contains a survey point identification, spatial coordinates, elevations in meters above North American Vertical Datum of 1988, and a descriptive code for each point number. The data release also provides a channel cross-sectional area for each river stage in 0.01-meter increments derived from the survey data.