Side-scan sonar imagery from "Hydraulic and Substrate Maps of Reaches Used by Sturgeon (Genus Scaphirhynchus) in the Lower Missouri River, 2005-07"

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Title:
Side-scan sonar imagery from "Hydraulic and Substrate Maps of Reaches Used by Sturgeon (Genus Scaphirhynchus) in the Lower Missouri River, 2005-07"
Publication_Date: 2008
Geospatial_Data_Presentation_Form: raster digital data
Originator: Joanna M. Reuter
Originator: Robert B. Jacobson
Originator: Caroline M. Elliott
Originator: Harold E. Johnson, III
Originator: Aaron J. DeLonay
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: Data Series 386
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.5.1450
Description:
Abstract:
A collection of reach-scale maps of hydraulic and substrate characteristics were generated for the habitat-use portion of an interdisciplinary sturgeon research project on the Lower Missouri River (from Gavins Point Dam to the junction with the Mississippi River). The maps were derived from hydroacoustic data sets that were collected for the purpose of assessing physical aquatic habitat in the vicinity of locations of adult shovelnose sturgeon (Scaphirhynchus platorynchus) and pallid sturgeon (S. albus). Hydroacoustic data sets were collected at the reach scale (mean reach length, 2.4 kilometers) in order to include the immediate vicinity of a targeted sturgeon location as well as the full range of habitat available at the bend and crossover scale. Reaches typically were surveyed on the day following the relocation of a telemetered sturgeon and at a discharge within 10 percent of the discharge on the sturgeon relocation date in order to characterize as closely as possible the channel morphology and flow-field conditions at the time that the sturgeon was present. One hundred fifty-three reaches were mapped during April-September in the years 2005 through 2007, with the majority of data collection occurring in the months of May and June (coinciding with the period of sturgeon migration and spawning in the Lower Missouri River). Interpolated maps (grid cell size, 5 meters) depict depth, generalized substrate, and depth-averaged velocity. Side-scan sonar imagery is also available for a subset of reaches.
Purpose:
The maps were derived from hydroacoustic data sets that were collected for the purpose of assessing physical aquatic habitat in the vicinity of locations of adult shovelnose sturgeon (Scaphirhynchus platorynchus) and pallid sturgeon (S. albus).
Time_Period_of_Content:
Currentness_Reference: ground condition
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20050405
Ending_Date: 20070717
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -97.442
East_Bounding_Coordinate: -90.295
North_Bounding_Coordinate: 49.955
South_Bounding_Coordinate: 38.485
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: inlandWaters
Place:
Place_Keyword: Missouri
Place_Keyword: Kansas
Place_Keyword: Iowa
Place_Keyword: Nebraska
Place_Keyword: South Dakota
Place_Keyword: USA
Place_Keyword_Thesaurus: None
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, Columbia Environmental Research Center
Contact_Address:
Address_Type: mailing and physical address
Address: 4200 New Haven Road
City: Columbia
State_or_Province: MO
Postal_Code: 65201
Country: USA
Contact_Voice_Telephone: 573-875-5399
Data_Set_Credit:
Funding for this project was provided by the U.S. Army Corps of Engineers (USACE), Missouri River Recovery–Integrated Science Program and the U.S. Geological Survey (USGS). This work was part of the Comprehensive Sturgeon Research Project, a large, interdisciplinary, multiyear research project to which numerous individuals contributed. The following individuals, in particular, deserve mention: Matt Smith, Chad Vishy, Mark Laustrup, David Gaeuman, Kim Chojnacki, Emily Tracy-Smith, and Sandy Clark-Kolaks. Sturgeon tracking crews, under the supervision of Aaron DeLonay, were also essential to this work.
Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
In 2006 and 2007, mapping crews collected side-scan sonar data in a subset of reaches that had potential to contain spawning areas. Side-scan sonar provides an image of the riverbed based on hydroacoustic returns from a towfish that is deployed from the boat. The images are useful for visualizing channel substrate and detecting the presence of relatively large fish, including adult sturgeon. Data sets were collected with a 900-kHz towfish (Marine Sonic Technology, Ltd, White Marsh, Virginia) using an image width of 20 meters on each side, providing a 40-meter total swath width (Marine Sonic Technology Ltd., 2001). Side-scan sonar data were collected while making multiple longitudinal passes downstream through the reach. The highest quality images result from keeping the towfish a uniform distance off of the bottom, a task that can be challenging in a river environment. A powered winch was used to raise and lower the towfish by its cable while collecting data. Sea Scan PC software (Marine Sonic Technology, Ltd., White Marsh, Virginia) logged the data to a computer. Differential GPS was used to record the position of the boat. The GPS position provides only approximate georeferencing for the side-scan imagery, because the towfish position changes based on the amount of cable that is released to compensate for depth. Thus, the position of the towfish is not known precisely. Each side-scan data set was collected from one of three boats: the R/V Funk, the R/V Brush, or the R/V Schmudde (table 1 in Reuter and others, 2008). Side-scan sonar data sets were used to generate images of the channel bottom in a high-resolution, minimally processed form (fig. 6 in Reuter and others, 2008) and also as georeferenced mosaics (fig. 7 in Reuter and others, 2008). We used SonarWeb software (Chesapeake Technology, Inc., Mountain View, California) for all side-scan sonar processing. Georeferenced images are based on DGPS navigation data. We did not compensate for the length of cable utilized during data collection (typically 3–10 m), so georeferencing is approximate. Because of stretching that occurs to the image during georeferencing, the quality and resolution of georeferenced images is degraded relative to the unprocessed images. However, both versions of the image can be used in conjunction for interpretation. For example, locations of fish or other features often can be discerned from the original images, and the georeferenced images can be used to determine the approximate locations of such features. The georeferenced images tend to be of sufficient quality to assist with identification of substrate. Where side-scan sonar data were collected, they were used to verify substrate classification produced by RoxAnn processing.
Process_Date: 2005-2007
Logical_Consistency_Report:
Each individual reach map depicts physical conditions dependent on the discharge and channel morphology at the time of mapping; both of these factors are dynamic on the Lower Missouri River. For more information, see associated report: Reuter and others, 2008, USGS Data Series Report 386.
Completeness_Report:
Maps represent conditions in parts of the reach deep enough for the boat to navigate. In some cases, patches of data are missing due to poor quality GPS data or equipment malfunction. Some reaches are shorter than their planned length due to onset of inclement weather. For more information, see associated report: Reuter and others, 2008, USGS Data Series Report 386.
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Planar_Distance_Units: meters
Coordinate_Representation:
Abscissa_Resolution: 5.000000
Ordinate_Resolution: 5.000000
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 15
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -93.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Distribution_Information:
Distribution_Liability:
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, Columbia Environmental Research Center
Contact_Address:
Address_Type: mailing and physical address
Address: 4200 New Haven Rd
City: Columbia
State_or_Province: MO
Postal_Code: 65201
Country: USA
Contact_Voice_Telephone: 573-875-5399
Contact_Facsimile_Telephone: 573-876-1896
Custom_Order_Process: Please contact distributor.
Resource_Description: U.S. Geological Survey Data Series 386
Metadata_Reference_Information:
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Contact:
Contact_Information:
Contact_Address:
Address_Type: mailing and physical address
City: Columbia
State_or_Province: MO
Postal_Code: 65201
Address: 4200 New Haven Road
Country: USA
Contact_Voice_Telephone: 573-875-5399
Contact_Person_Primary:
Contact_Person: Joanna M. Reuter
Contact_Organization: U.S. Geological Survey
Metadata_Date: 20081104
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.8 on Fri Feb 20 15:17:30 2009