Shallow water hydrographic surveying using a high resolution multibeam echosounder
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Shallow Water Hydrographic Surveying using a High Resolution Multibeam Echosounder. Richard C. Wilson, P.E., and Brenda K. Woodward Nebraska Water Science Center 2010 Tri-Agency Meeting Oct. 5, 2010. Hydrographic Surveying. Aristotle observed that sound could be heard in water

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Shallow Water Hydrographic Surveying using a High Resolution Multibeam Echosounder

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Shallow water hydrographic surveying using a high resolution multibeam echosounder

Shallow Water Hydrographic Surveying using a High Resolution Multibeam Echosounder

Richard C. Wilson, P.E., and

Brenda K. Woodward

Nebraska Water Science Center

2010 Tri-Agency Meeting

Oct. 5, 2010


Hydrographic surveying

Hydrographic Surveying

  • Aristotle observed that sound could

    be heard in water

  • Allies invent the sonar during

    World War I

  • Coast and Geodetic Survey deployed

    the Fathometer in 1925

  • U.S. Navy deployed a multibeam echosounder in the 1960s


Hydrographic surveying purposes

Hydrographic Surveying - Purposes

  • Navigational aide

  • Quantity surveys

  • Inspections of dams, bridges, and water control structures

  • Habitat assessments

  • Hydrodynamic and sediment-transport models

  • Geomorphic assessments


Single beam echosounder

Single-Beam Echosounder


Multibeam hydrographic surveying

Multibeam Hydrographic Surveying

  • Wide yet narrow swath perpendicular to the boat direction

  • Multiple beams in just one ping

  • SURVEYS the ENTIRE RIVER or LAKE BED


Shallow water multibeam hydrographic surveying

Shallow Water Multibeam Hydrographic Surveying

  • Minimum depth is 1 meter

  • Swath angle 128° or width-to-depth ratio 3.5 to 1

  • Rotation of the transducer for surveying horizontal features

  • Use Single and Multibeam Echosounders, together

  • Flat keel boat

  • Obstructions


Multibeam echosounder

Multibeam Echosounder


Reson seabat 7125 multibeam echosounder system

RESON Seabat 7125 Multibeam Echosounder System

  • Digital beam-former

  • 400 kHz

  • 256 or 512 beams

  • 128° swath angle

  • 200 meter range

  • Bathymetry data and Side-Scan imagery


Multibeam echosounder components

Multibeam Echosounder Components

Projector

Array

Sound

Velocity

Probe

Receiver

Array


Multibeam echosounder components1

Multibeam Echosounder Components

Real-Time Kinematic Global Positioning System (RTKGPS) or Differential Global Positioning System (DGPS)

Inertial

Measurement

Unit (IMU)

Sonar display

Navigation computer

Position and Orientation

Solution (POS-MV) motion control unit

7-P sonar signal

processor


Patch test calibration

Patch Test Calibration

Roll correction

Pitch correction

Yaw correction

Nadar Beam


Shallow water hydrographic surveying using a high resolution multibeam echosounder

Collapsed Historical Bridge Deck near Warsaw, Missouri


Shallow water hydrographic surveying using a high resolution multibeam echosounder

Bridge Piers near Warsaw, Missouri


Shallow water hydrographic surveying using a high resolution multibeam echosounder

Bridge Pier near Warsaw, Missouri


Multibeam data processing

Multibeam Data Processing

  • Dell Precision T7500

  • Intel Xeon Quad Core Processor 3.46 GHz

  • 12GB DDR3 SDRAM, 1333MHz,

  • 2 GeForce GTX 480 2.0

  • Graphics Card


Multibeam data processing1

Multibeam Data Processing

Line-by-line swath editing is necessary


Multibeam data processing2

Multibeam Data Processing


Shallow water hydrographic surveying using a high resolution multibeam echosounder

Gavins Point Dam Multibeam Survey

  • Purpose:

  • Document change from 1957-2008

  • Verify the integrity of energy dissipation structures

  • Create updated bathymetric contours


Shallow water hydrographic surveying using a high resolution multibeam echosounder

Gavins Point Dam Spillway


Shallow water hydrographic surveying using a high resolution multibeam echosounder

Energy Dissipation Structures

  • Determined the

  • structural integrity

  • Divers were not needed, eliminating a safety hazard

  • Measured change to 0.1 M


Gavins point dam spillway intake

Gavins Point Dam - Spillway Intake


Missouri river bends

Missouri River Bends

Missouri River Habitat Assessment and Monitoring Program (HAMP)

  • Habitat improvement through structure modification

  • Wing dike notches

  • Chevrons

  • Parallel dikes

  • Revetment removal


Hydrographic surveys of glovers bend

Hydrographic Surveys of Glovers Bend

Single-beam echosounder

Glovers Bend, Missouri River

2007


Hydrographic surveys of glovers bend1

Hydrographic Surveys of Glovers Bend

Multibeam echosounder

Glovers Bend, Missouri River

2009


Hydrodynamic modeling of the missouri river using md swms

Hydrodynamic Modeling of the Missouri River using MD_SWMS


Experimental advanced airborne research lidar eaarl

Experimental Advanced Airborne Research LiDAR (EAARL)

Water penetrating LiDAR

Uses Blue-green laser

NASA/USGS Technology

Shallow water EAARL survey, Central Platte River


Side scan sonar using backscatter intensity to classify substrate

Side-Scan Sonar: Using Backscatter Intensity to Classify Substrate


Shallow water hydrographic surveying using a high resolution multibeam echosounder

CONTACT INFORMATION: Rick Wilson USGS Nebraska Water Science Center (402) 328-41205231 South 19th St. [email protected], NE 68512-1271http://ne.water.usgs.gov

Robert B. Swanson

Director

(402) 328-4110

[email protected]

Richard C. Wilson, P.E.

Associate Director of

Hydrologic Studies

(402) 328-4120

[email protected]

Ronald B. Zelt

Associate Director of NAWQA Studies

(402) 328-4140

[email protected]

Jason M. Lambrecht

Associate Director of Hydrologic Data

(402) 328-4124

[email protected]


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