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Jv r hsb antwerpen dec 2010
 

Jv r hsb antwerpen dec 2010

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Jeroen van Reenen, aspects of surveying in the Port of Rotterdam

Jeroen van Reenen, aspects of surveying in the Port of Rotterdam

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    Jv r hsb antwerpen dec 2010 Jv r hsb antwerpen dec 2010 Presentation Transcript

    • Navigational depth Best practice in Rotterdam approaches Jeroen van Reenen
    • Navigational depth
      • Port environment
      • Dredging mangement
      • Navigational depth
      • Density surveying
      • Investigation surveys
      • Research siltation in Rotterdam ports
      • River estuary
      • Tidal water
      • River discharge
      • Salt water currents
      • Storms
      1 Port Environment
    •  
    •  
    •  
    • 2 Dredging management
      • By area
      • By organisation
      • By contract
      • By dredging equipment
      • By navigational depth definition / measurements
    • Port of Rotterdam / Rijkswaterstaat
    • Dredging contract type
      • TDS based
      • Time based
      • Combination TDS/Time
      • Lum sum contract
    • Dredging equipment
      • Size of hopper dredgers
      • Submersible pump
      • Use of plough vessel
    • 3 Navigational depth
      • Fluid mud
      • Measurement systems
      • Data processing / charting
    • Navigational depth parameters
      • Viscosity [N*s / m 2 ]
      • Sheer stress [N / m 2 ]
      • Density [kg / m 3 ]
      • PIANC (1983)
      • 1) The ship’s hull must suffer no damage even if its draught reaches the full navigable depth
      • 2) The navigation response of the vessel must not be adversely affected
    • Minimum UKC Berge Stahl 343 m long 63 m wide 365.000 T 354.000 T @ 23m 3 deg roll, 1.65m
    • Rotterdam definitions
      • Navigational depth at 1200 g/l density level
      • Multibeam echosounding for “top of siltation layer”
      • Assuming top of siltation 1030 g/l
      • Density measurment to detect layer 1030-1200 g/l
    • 4 Density surveying Echosounder depth 1.2 T/m3 depth
    • Density measurments
      • Weight
      • Radio active counting
      • Tuning fork
      • Acoustics
    • DensiTune
      • Tuning fork technique
      • Fluid mud layer detection up to 1250 gr/l
    • Density-depth chart
      • 1030 g/l: 23.25 m
      • 1200 g/l: 23.47 m
      • Density layer: 0.22 m
    • DensiTune point export
    • DensiTune Calibration
      • Get a representative local fluid mud sample
      • If density is not over 1200 g/l give time to settle
      • Drain water
      • No more stirring than necessary to get a homogeneous sample
      • Min. 5 different density measurements by adding sea water to sample material
    • Van Veen grab
    • Calibration barrel
    • DensiTune calibration
    • Check on measurements against calibration
    • Point measurements
    • TIN model
    • Isopach DTM
    • SILAS raw data Digital 200 KHz SILAS 1.2 density Echo “noise”
    • Calibration of Silas
    • Singlebeam tracks
    • Monitor tracks
    • Long sections
    • Authority boundary
    • Multibeam depth (240 KHz)
    • Navigational depth (1200 g/l)
    • Navitracker
      • Nucleair system
      • Used verticale
    • Slib tank Antwerpen tests
      • Check accuracy of DensiTune system
      • Check on accuracy of Silas system
    •  
    • DensiTune results
    • Silas results
    • New development undisturbed bottom sampling
      • Based on standard Beeker-sampler
      • Free fall triggering
      • Altitude and attitude monitoring
      • Density measurement by Anton Paar calibrated instrument
      • Convert sample profile data for Silas echosounder calibration
    • Free fall Beeker sampler
    • Sample density measurement
    • 5 Siltprofiler surveys
      • Water column profiling
      • Current measurements
      • Water samples for calibration
    • Siltprofiler
    • OBS data
    • 6 Research siltation Forces of nature
      • Current
      • River discharge
      • Tide
      • Salinity
      • Wind force and direction
      • Temperature
    • Current and tide
      • Transport of suspended sediment
      • River flow against tidal currents
      • Eddies in port basins
    • Current profiles
    • Suspended sediment
    • Salinity Flud from Sea River flow Wedge mixing Surface mixing
    • Salinity / siltation
    • Wind
      • Wind creates waves, waves bring sediment into the water column
      • Wind influences the tide
    • Windforce 2009
    • Temperature
      • Water temperature range 5 – 20 deg
      • Microbiology in bottom layers
      • Methane gas production
    • Temperature / dredging
    • Temperature / Siltation layer
    • Thank you for your attention