U.S. Geological Survey
2018
Multibeam bathymetric data collected within Lake Powell, UT-AZ during USGS Field Activity 2017-049-FA using a dual-head Reson T20-P multibeam echosounder (32-bit GeoTIFF, UTM Zone 12N, NAD 83, NAVD 88 Vertical Datum, 2-m resolution).
1.0
raster digital data
data release
DOI:10.5066/P90BU2VS
Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/P90BU2VS
https://www.sciencebase.gov/catalog/item/5b90140ae4b0702d0e80756d
Brian D. Andrews
Wayne E. Baldwin
Charles R. Worley
Robert L. Baskin
Jane F. Denny
David S. Foster
Barry J. Irwin
Eric M. Moore
Alex R. Nichols
2018
High-resolution geophysical data collected in Lake Powell, Utah-Arizona, U.S. Geological Survey Field Activity 2017-049-FA
1.0
data release
DOI:10.5066/P90BU2VS
Reston, VA
U.S. Geological Survey
Suggested citation: Andrews, B.D., Baldwin, W.E., Worley, C.R., Baskin, R.L., Denny, J.F., Foster, D.S., Irwin, B.J., Moore, E.M., and Nichols, A.R., 2018, High-resolution geophysical data collected in Lake Powell, Utah-Arizona, U.S. Geological Survey Field Activity 2017-049-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P90BU2VSm .
https://doi.org/10.5066/P90BU2VS
https://www.sciencebase.gov/catalog/item/5b900656e4b0702d0e807395
High-resolution geophysical mapping of Lake Powell in the Glen Canyon National Recreation Area in Utah and Arizona was conducted between October 8 and November 15, 2017, as part of a collaborative effort between the U.S. Geological Survey and the Bureau of Reclamation to provide high-quality data needed to reassess the area-capacity tables for the Lake Powell reservoir. Seismic data collected during this survey can help to define the rates of deposition within the San Juan and Colorado Rivers, which are the main inflows to Lake Powell. These new data are intended to improve water budget management decisions that affect the natural and recreational resources of the reservoir. Multibeam echosounder bathymetry and backscatter data were collected along 2,312 kilometers of tracklines (331 square kilometers) of the lake floor to regionally define its depth and morphology, as well as the character and distribution of lake-floor sediments. Ninety-two kilometers of seismic-reflection profile data were also collected to define the thickness and structure of sediment deposits near the confluences of the San Juan and Colorado Rivers.
The purpose of this dataset is to provide a high-resolution digital elevation model (DEM) of the lake bed of the Lake Powell reservoir referenced to the North American Vertical Datum of 1988 (NAVD 88). These data will be merged with recently flown LiDAR data to produce a bathymetric-topographic elevation model to develop new capacity tables for the Lake Powell Reservoir.
The elevation of the lake surface during the time of the survey was approximately 1081 meters (WGS 84 ellipsoidal heights), or 1107 meters, (orthometric heights relative to the NAVD 88 vertical datum) as measured by the Applanix Wavemaster DGPS on the R/V Stephens.
Additional information on the field activity is available from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-049-FA.
20171008
20171115
data were collected on the following dates: 20171008-20171022 (Julian day 281-295); 20171024-20171109 (Julian day 297-313); 20171115 (Julian day (319).
None planned
-111.57278
-110.41513
37.84086
36.88445
USGS Metadata Identifier
USGS:5b90140ae4b0702d0e80756d
None
U.S. Geological Survey
USGS
Woods Hole Coastal and Marine Science Center
WHCMSC
Coastal and Marine Geology Program
CMGP
Utah Water Science Center
UWSC
Bureau of Reclamation
BOR
National Park Service
NPS
Department of the Interior
DOI
Colorado River Storage Project
CRSP
field activity number 2017-049-FA
R/V Stephens
GeoTIFF
multibeam echosounder
multibeam bathymetry
bathymetry
Reson
T20-P
Lacustrine Geology
ISO 19115 Topic Category
geoscientificInformation
imageryBaseMapsEarthCover
elevation
inlandWaters
USGS Thesaurus
multibeam sonar
lakebed characteristics
bathymetry
geophysics
geology
geospatial datasets
None
United States of America
State of Utah
State of Arizona
Garfield County
San Juan County
Kane County
Coconino County
Lake Powell
Glen Canyon National Recreation Area
Glen Canyon
Colorado River
Great Bend
San Juan River
Escalante River
Hite
Good Hope Bay
Bullfrog
Bullfrog Bay
Halls Crossing
Halls Bay
Rainbow Bridge National Monument
Dangling Rope
Rock Creek Bay
Friendship Bay
Last Chance Bay
Padre Bay
Gunsight Bay
Warm Creek Bay
Wahweap
Wahweap Bay
Antelope Canyon
Navajo Canyon
Page
Glen Canyon Dam
None
lake floor
lakefloor
none
2017
none
Public domain data from the U.S. Government are freely re-distributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. These data are not to be used for navigation.
U.S. Geological Survey
Brian Andrews
Geographer
mailing and physical
384 Woods Hole Road
Woods Hole
Massachusetts
02543-1598
US
508-548-8700 x2348
508-457-2310
bandrews@usgs.gov
https://www.sciencebase.gov/catalog/file/get/5b90140ae4b0702d0e80756d?name=2017-049-FA_T20P_Bathymetry_2m_browse.jpg
Thumbnail image of 2-m multibeam echosounder bathymetry data collected within Lake Powell, UT-AZ.
JPEG
This grid represents processed dual-head Reson T20-P multibeam echosounder (MBES) bathymetry data gridded at 2-m resolution. Quality control and data processing were conducted to remove spurious points and reduce sound speed artifacts (refraction) using Computer Aided Resource Information System (CARIS) Hydrographic Information Processing System (HIPS; versions 10.2 and 10.4). Despite this processing, small areas of vessel motion and refraction artifacts remain in the data, particularly in deeper areas of the Colorado River. The small slot canyons terminating in the Colorado River presented several challenges to acoustic survey methods. The deep, sinuous canyons such as Rainbow Bridge, Navajo, and Wetherill Canyons are characterized by steep walls with overhangs, above-and below-the lake surface. The overhangs above the surface interfered with the GPS signal at times, requiring detailed editing of the navigation within these areas. The canyon wall overhangs beneath the lake surface produced multipathing of the acoustic signal that required significant editing to minimize the multipath artifact. Small "no data" gaps exist throughout the dataset. These are the result of editing the artifacts and, in some areas, eliminating low quality soundings. In addition, gaps exist in shallow areas where underwater obstructions created hazards for the safe navigation of the survey vessel. Despite editing of the attitude data, vertical offsets between adjacent lines still exist due to equipment malfunctions at the end of the survey in Wahweap and Warm Springs Bays.
Data were not collected on October 23, 2017 while the base of operations was moved from Bullfrog, UT in the northeast to Page, AZ in the southwest. Data were not collected between Nov 10 and 14 because of a cable failure of the Applanix navigation and attitude system. Operations resumed (and were completed) November 15, 2017 after installation of the new cable.
Navigation data were acquired using the WGS 84 coordinate system with an Applanix POS MV Wavemaster (model 220, V5), which blends Global Navigation Satellite Systems (GNSS) with acceleration data from a Motion Reference Unit (MRU) and GPS azimuthal heading. The POS MV was configured with two AeroAntenna Technologies GPS antennas located at either end of a 2-m baseline, which was oriented fore and aft and mounted atop the MBES pole, approximately midships on the starboard side of vessel. DGPS positions were obtained from the primary antenna located on the forward end of the baseline, and the positional offsets between the antenna and the navigational reference point (the POS MV IMU) were accounted for in the Applanix POSView (version 8.60) acquisition software. DGPS positions are horizontally accurate to 0.5 - 2 meters, but accuracy can increase to less than 10 cm after post-processing with Applanix POSPac (version 8.1).
Vertical accuracy of the raw data based on system specifications may be approximately 1 percent of water depth (ranging from 0.5 to 1.5 meters based on the water depth range of less than 5 meters to approximately 150 meters within the survey area). The Applanix Wavemaster POS MV Attitude and Positioning system, used to correct for vessel roll, pitch, heave, and yaw, has a theoretical vertical accuracy of a few mm. Post-Processed Kinematic (PPK) GPS height corrections (from Applanix POSPac smoothed best estimate of trajectory (SBET) files) were used to reference soundings to the World Geodetic System 1984 (WGS 84) ellipsoid and remove water depth fluctuations in lake levels during the survey. Fifty-six sound speed profiles acquired with an AML Minos X SVPT sound velocity profiler were used during processing to minimize acoustic refraction artifacts in the bathymetry data. Changes in vessel draft due to water and fuel usage were not considered.
Additionally, uncertainty associated with the vertical transformation of the bathymetric grid from WGS 84 (ITRF 2000) to the North American Vertical Datum of 1988 (NAVD 88) using VDatum transformation tool (NOAA) is approximately 7.6 cm as calculated by the VDatum tool (v. 3.8).
U.S. Geological Survey
Unpublished Material
raw MBES data in s7k format
digital data
disc
20171008
20171115
ground condition
RAW RESON T20-P MULTIBEAM ECHOSOUNDER FILES
Multibeam echosounder (MBES) bathymetry and backscatter data were collected using dual-head Reson T20-P sonars. The pair of mills cross transmit and receive arrays were mounted side-by-side within a bracket that oriented them at opposing 30-degree angles (relative to horizontal). The bracket was pole-mounted on the starboard side of the R/V Stephens so that the sonar arrays were oriented athwart ships (primary and secondary arrays facing outward and down to port and starboard, respectively) and located approximately 1.235 m below the waterline when deployed. Vessel navigation and attitude data were acquired using an Applanix POS MV Wavemaster (model 220, V5) configured with two AeroAntenna Technologies GPS antennas located at either end of a 2-m baseline, which was oriented fore and aft and mounted atop the MBES pole approximately midships on the starboard side of vessel, and the wetpod MRU mounted atop the sonar bracket just aft of the pole. An AML Micro X SV mounted on the sonar bracket monitored sound speed near the sonars during acquisition, and an AML Minos X SVPT deployed using an electric downrigger mounted on the port quarter was used to collect water column sound speed profiles 1 to 3 times each survey day (See shapefile 2017-049-FA_SVPdata.shp available from the larger work citation). The Reson SeaBat User Interface (version 5.0.0.6) was used to control the sonars, which were operated in intermediate mode at full power (220 db), with frequency-modulated pulses between 200 to 300 kHz. The range of the 1024 across track beams formed by the sonars were adjusted manually depending on water depth, and resulted in combined swath widths of 60 to 200 meters or typically 3 to 6 times the water depth. Data were monitored and recorded using the Reson SeaBat User Interface (UI) (version 5.0.0.6) and Hypack/Hysweep (version 2017, 17.1.3.0). The SeaBat User Interface logged the navigation, attitude, bathymetry, time-series backscatter, and water column data to s7k format files for each sonar. The line files were created by the Reson UI using the following naming convention: YYYYMMDD_HHMMSS_M/S. The line files were appended with an "M" and "S" suffix to denote the port (or primary) "M" and "S" starboard (or secondary) sonar heads
PROCESSING STEP 1: CARIS HIPS DATA PROCESSING.
Multibeam bathymetry processing within CARIS HIPS (version 10.2) during the survey consisted of the following flow:
1) Vessel configuration files were created in CARIS for the port ("M"=main, or primary) and starboard ("S"=secondary) sonars (RVStephens_DualT20P_M.hvf, and RVStephens_DualT20P_S.hvf) which includes, linear and angular installation offsets for each T20-P unit as well as vendor specified uncertainty values for each of the survey sensors.
2) A CARIS HIPS project (version 10.2) was created with projection information set to Universal Transverse Mercator (UTM) Zone 12N, WGS 84. Separate HIPS projects were created for the Port (M), and Starboard (S) line files using the two vessel configuration files in #1 above.
3) Each Reson s7k file (M and S) were imported to the new CARIS projects (M and S respectively) using the Import/Conversion Wizard.
4) Delayed heave data from raw POS MV files were used to update HIPS survey lines using the import auxiliary data function.
5) Navigation was reviewed and edited as needed using the Navigation Editor tool.
6) Sound velocity correction was applied using the CARIS algorithm, a master SVP file containing all the sound velocity profiles collected during the survey and specifying the nearest in distance method, delayed heave source, and use surface sound speed.
7) Data were merged selecting no tide and the delayed heave source.
8) 2-m resolution Swath Angle Weighted (SWATH) surfaces were created to incorporate all the files (M and S) as they were processed, and the SWATH surfaces were reviewed for inconsistencies and anomalies.
9) The swath and subset editors were used to remove spurious points through manual editing and filter application, and the refraction editor was used to adjust sound speed values in areas where velocimeter data did not adequately correct depth profiles, which were obviously influenced by local anomalies in speed of sound through the water column.
10) Survey lines adjusted for refraction anomalies were remerged, and the respective SWATH surfaces were recomputed to reflect the changes. Processing during the survey was primarily focused on QA/QC during acquisition. Editing processes did require trial and error, and were at times iterative. The contact person for this and all subsequent processing steps below is Brian Andrews.
201711
U.S. Geological Survey
Brian Andrews
Geographer
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2348
508-457-2310
bandrews@usgs.gov
PROCESSING STEP 2: APPLY POST PROCESSED SBET FILES AND EDIT SOUNDINGS.
Post-survey processing within CARIS HIPS (version 10.4) consisted of the following flow:
1) Post-processed navigation, vessel attitude, and GPS height data from POSPac SBET files, and post-processed RMS attitude error data from POSPac smrmsg files were used to update HIPS survey lines using the import auxiliary data function.
2) Navigation source was set to Applanix SBET, and navigation was reviewed and edited as needed using the Navigation Editor tool.
3) GPS tide was computed using delayed heave data, the vessel water line, and a single datum value of 0 m (vertically referencing the data to the WGS 84 Ellipsoid).
4) Sound velocity correction was reapplied using the CARIS algorithm, the master SVP file containing all the sound velocity profiles collected during the survey and specifying the nearest in distance method, delayed heave source, and use surface sound speed.
5) Data were remerged selecting the GPS tide and delayed heave sources.
6) 2-m resolution SWATH surfaces using both the M and S files were created using the Swath Angle method and a maximum footprint of 9.
7) Additional editing was conducted using the swath and subset editors to minimize inconsistencies and artifacts, and the SWATH surface was recomputed to reflect the changes. Finally, small "no data" holidays were filled using the "Fill Raster Holiday" tool and a 5x5 cell filter using data from a minimum of 5 neighboring cells.
201807
PROCESSSING STEP 3: EXPORT AND TRANSFORM TO NAVD 88.
The CARIS HIPS SWATH surfaces were exported as 2-m per pixel ASCII files referenced to UTM Zone 12N, WGS 84 and WGS 84 ellipsoidal heights, but the desired vertical datum of the final composite bathymetric surface was the North American Vertical Datum of 1988 (NAVD 88). The National Oceanic and Atmospheric Administration's Vertical Datum Transformation tool (VDatum v. 3.8) was used to achieve that goal. The process required transformation of the horizontal and vertical reference frames from UTM Zone 12, WGS 84 and WGS 84 ellipsoidal heights to UTM Zone 12, North American Datum of 1983 (NAD 83) and NAVD 88 orthometric heights (all in meters) using the GEIOD12B geoid model. The resulting ASCII rasters were merged together into one 32-bit floating point GeoTIFF (2017-049-FA_T20PBathymetry_2m.tif.) using the "Mosaic to New Raster" tool within ArcMap (v. 10.3.1).
201807
Added keywords section with USGS persistent identifier as theme keyword.
20200806
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Raster
Pixel
52771
50428
1
Universal Transverse Mercator
12N
0.9996
-111
0
500000
0
row and column
2.0
2.0
meters
GCS_North_American_1983_2011
GRS_1980
6378137.000000
298.257222101
North American Vertical Datum of 1988
0.1
meters
Explicit depth coordinate included with horizontal coordinates
Elevation values in 32-bit GeoTIFF format. Data values represent depths referenced to the North American Vertical Datum of 1988 (NAVD 88).
U.S. Geological Survey
U.S. Geological Survey - ScienceBase
mailing and physical address
Denver Federal Center
Building 810
Mail Stop 302
Denver
CO
80225
1-888-275-8747
sciencebase@usgs.gov
USGS data release 2017-049-FA multibeam echosounder 2-m bathymetry of Lake Powell, UT-AZ: includes the GeoTIFF image 2017-049-FA_T20P_Bathymetry_2m.tif, the browse graphic 2017-049-FA_T20P_Bathymetry_2m_browse.jpg, and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2017-049-FA_T20P_Bathymetry_2m.meta.xml).
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
GeoTIFF
ArcGIS (v. 10.3.1)
32-bit GeoTIFF file
GeoTIFF image file derived from MBES bathymetry data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center in Lake Powell AZ-UT and the associated metadata.
Use WinZip, 7zip, Peazip or pkUnzip
620
https://www.sciencebase.gov/catalog/item/5b90140ae4b0702d0e80756d
https://www.sciencebase.gov/catalog/file/get/5b90140ae4b0702d0e80756d
https://doi.org/10.5066/P90BU2VS
The first link is to the page containing the data, the second link downloads all data available from the page as a zip file, and the third link is to the publication landing page.
WMS
Image of 2017-049-FA_T20P_Bathymetry_2m.tif provided through a WMS (web mapping service).
https://gis.usgs.gov/sciencebase2/services/Catalog/5b90140ae4b0702d0e80756d/MapServer/WMSServer?request=GetCapabilities&service=WMS
https://www.sciencebase.gov/catalog/item/5b90140ae4b0702d0e80756d
https://doi.org/10.5066/P90BU2VS
The first link in the network resources accesses the data through a mapping service, the second is to the page containing the data, and the third link is to the publication landing page.
ArcGIS Mapping Service (REST)
Image of 2017-049-FA_T20P_Bathymetry_2m.tif provided through a ArcGIS mapping service (REST).
https://gis.usgs.gov/sciencebase2/rest/services/Catalog/5b90140ae4b0702d0e80756d/MapServer
https://www.sciencebase.gov/catalog/item/5b90140ae4b0702d0e80756d
https://doi.org/10.5066/P90BU2VS
The first link in the network resources accesses the data through a mapping service, the second is to the page containing the data, and the third link is to the publication landing page.
none
To utilize these data, the user must have software capable of viewing GeoTIFF files.
20200806
U.S. Geological Survey
Brian Andrews
Geographer
mailing and physical
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2348
(508) 457-2310
bandrews@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time