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Widseth Smith Nolting & Assoc., Inc.
Hydrographic Surveying
• Introduction of Speaker
• Definition
• Applications
• Echo sounding
• Sounding equipment
• Survey vessels
• Dredging equipment
• Software – Data Processing
• Tidal Datums
• Projects
• Education
• ACSM/ THSOA Hydrographer Certification
• Links
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Introduction of Speaker
Juergen Brunkhorst
Hometown: Rotenburg (W.)
College: Hamburg
Employment: Wilhelmshaven and Rostock
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Definition
Hydrography is the branch of applied sciences which deals with the measurement and description of the
physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their
change over time, for the primary purpose of safety of navigation and in support of all other marine
activities, including economic development, security and defence, scientific research, and environmental
protection. (International Hydrographic Organization )
The scientific description and analysis of the physical conditions, boundaries, flow, and related
characteristics of the earth's surface waters.
The mapping of bodies of water.
Bathymetry
The measurement of the depth of bodies of water
• Underwater topo
• Features and breaklines not visible
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Applications
• Safe and efficient operation of maritime traffic control
• Charting
• Port management
• Dredging and coastal engineering (Navigation,
Cleanup – Fox River, WI)
• Beach Replenishment
• Exploration and Exploitation of Marine Resources
• Utility lines – offshore wind farm
• Marine archaeology
• Other marine scientific purposes
• Coastal Zone Management
• Environmental Protection
• Maritime Defense
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Conventional
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Echo sounding
Principle
• Sonar
• Transducer
• Depth = Speed of Sound x Travel time x 0.5
• Speed of Sound in Water is approx. 1,500 m/s (salinity, temperature)
• Compare to Air: 340 m/s
• Probe or Bar check
Equipment
• Single-beam
• Multibeam
• Sub-bottom profiler
• Side scan sonar
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Survey Methods
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Single-beamSingle-beam echo sounders collect discrete data points along survey track lines.
• Commonly available
• Low cost
• Portable
• Easy deployment
• Dual frequency (200 kHz/33kHz)
• Highly accurate• 200 kHz – 1cm (0.1% of depth value)
• 33 kHz – 10cm (0.1% of depth value)
HydroLite-TM(Professional Surveyor
Magazine Sep 2010)
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Multibeam
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Sub-bottom profiler
Identify and measure various marine
sediment layers that exist below the
sediment/water interface.
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Side scan sonar
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Survey Boats/Vessels
POB - March 28, 2011
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Backhoe Dredger
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Backhoe Dredger
• Up to 65 meters long
• Bucket capacity of up to 40 m3
• Maximum digging depth of 32 m
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Mechanical Dredge
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Bucket Dredger
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Cutter Dredger
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Trailing Suction Hopper Dredger
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Trailing Suction Hopper Dredger
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Software - Survey
Data Input
• Position
• Depth
• Heading
• Tide
• Heave
Background
• DXF
• Chart
• Planned lines
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Software - Processing• Filter Outliers• Apply Sound Velocity, Tide, Draft, Heave
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Data Processing
Motion Sensors
Gyros and accelerometers for
real time motion measurements.
Vertical Datum – Tide Readings
LAT = Lowest Astronomical Tide
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Tidal Datums
LAT = Lowest Astronomical Tide
(vs. NAVD 88/NGVD 29)
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Software – Backhoe Dredger
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Software – Cutter Dredger
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Software – Hopper Dredger
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Project – Cape Town
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Project – Terschelling
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Project – Terschelling
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Project – Rostock
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Project – Minden
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Education
University of New Brunswick, Fredericton, NB, Canada
The University of Southern Mississippi, Hattiesburg, MS
Durham, NH
Ocean Mapping options on the Master of Science and Doctor of Philosophy degrees in Ocean Engineering and Earth Sciences
One-year program - Master's degree in hydrographic science
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Hydrographer Certification
ACSM/THSOA Hydrographer Certification is well-recognized and considered by many Federal, State and local
agencies as well as private firms, seeking subcontractors when evaluating technical proposals for marine engineering,
surveying, and construction. These include port authorities, NOAA and the Corps of Engineers. The certification
program is also endorsed by The Hydrographic Society of America which provides financial support through annual
contributions.
Designed for hydrographers with five years of experience, ACSM/THSOA Certification authenticates your work
experience and gives credence to your resume. Earn certification through examinations offered throughout the year.
American Congress on Surveying & Mapping (ACSM)
• NSPS Certified Survey Technician (CST)
• BLM Certified Federal Surveyor (CFeds)
• Certified Floodplain Surveyor (CFS)
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Links
The Hydrographic Society of America (THSOA)
http://www.thsoa.org
Western Dredging Association (WEDA)
http://www.westerndredging.org
International Hydrographic Organization (IHO)
http://www.iho.intCategory A – Most advanced standard of training
Category B – Aimed at technician level
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Contact
Juergen Brunkhorst, LS, [email protected]
Widseth Smith Nolting
610 Fillmore St
Alexandria, MN 56308
Widseth Smith Nolting & Assoc., Inc.
Webography
http://www.nan.usace.army.mil
http://www.nauticalcharts.noaa.gov
http://www.nspsmo.org/
http://www.oicinc.com
http://www.omg.unb.ca/omg/
http://www.ozcoasts.org.au
http://www.professionalmariner.com
http://www.reson.com
http://www.schlei-ostsee-urlaub.de
http://www.seafloorsystems.com
http://www.shipmotion.se
http://www.teara.govt.nz
http://www.theartofdredging.com
http://www.thsoa.org/
http://www.usm.edu/marine/
http://www.welt-atlas.de
http://www.westerndredging.org/
http://www.windpowerninja.com
http://wsa-bremen.de
http://www.wsd-nordwest.de
http://2.bp.blogspot.com
http://celebrating200years.noaa.gov
http://geosci.sfsu.edu
http://gralston1.home.mindspring.com
http://oceanexplorer.noaa.gov
http://ports.co.za
http://ramsdells.net
http://wiki.reikapaat.fi
http://www.acsm.net/
http://www.aquasurvey.com
http://www.ardglobal.com
http://www.argos-luftbild.de
http://www.blythworkcats.co.uk
http://www.boskalis.com
http://www.ccom.unh.edu/
http://www.dcsc.tudelft.nl
http://www.dredge.com/
http://www.dredgingtoday.com
http://www.foxriverwatch.com
http://www.garmin.com
http://www.gehe-trading.de
http://www.glerl.noaa.gov
http://www.hypack.com/new/
http://www.ihcmerwede.com
http://www.iho-ohi.net/english/home/
http://www.latitude38.com
http://www.marinearchaeologists.com
http://www.maritimejournal.com
http://www.meridata.fi
http://www.musing.nl
