Hydrographic Surveying Introduction of Speaker Definition - - PDF document

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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-beam

Single-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) Widseth Smith Nolting & Assoc., Inc.

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

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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

• (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 Widseth Smith Nolting & Assoc., Inc.

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.int

Category A – Most advanced standard of training Category B – Aimed at technician level Widseth Smith Nolting & Assoc., Inc.

Contact

Juergen Brunkhorst, LS, CH

juergen.brunkhorst@wsn.us.com

Widseth Smith Nolting 610 Fillmore St Alexandria, MN 56308

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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