marijn de jong, deltares
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Use of data on environmental conditions
in engineering projects at Deltares
Martijn de Jong
Unit Hydraulic EngineeringHarbour, Coastal, and Offshore Engineering department
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Contents talk
short background on Deltares
compilation of short examples of hydraulic engineeringprojects at Deltares
(some from river eng., most from coastal eng.)
two coastal engineering examples in more detail
aim of talk, to illustrate: the extent of engineering topics covered by Deltares
how data on environmental conditions are used in
engineering projects
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Deltares: joint forces
Started January 2008
> WL | Delft Hydraulics
> GeoDelft> Part of TNO Building & Subsurface
> Part of Rijkswaterstaat (RIKZ, RIZA en DWW)
Research and consultancy for (inter)national clients
> (local) governments
> project developers
> contractors
>
Wide range of fields of expertise within Deltares
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Wide range of fields of expertise
.Urban water management.Integrated coastal management
.Integrated water management
.Climate
.Safety and risks.Operational forecasting systems & management systems
.Water and ground quality
.Spatial planning and ecology
.Linear infrastructure.Innovation management
.Strategic analysis
.Hydraulics.Hydrodynamics
.Morphology
.Offshore
.Intake & outfall systems.Dikes.
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Examples from River Engineering
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River bed computations
MS Aloha, draught 3.35 m
Grounded, 55 m from left bank, water level at -0,1 m+NAP
Delft3D computation
Lek branch of Rhine delta at Vianen
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River bed computations
before implementation
after implementation
Solution:
Additional
groynes to guide
the flow within anarrower zone
detailed knowledge of river bed
extensive hydrodynamic and mophological modelling
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Knowledge of the river bed
driesprong Beneden Merwede -
Noord - Oude Maas at Dordrecht
Involvement Deltares:
measurement techniques
monitoring programs/initiatives
Moerdijk
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Shoal monitoring and forecasting
Smart Fairways:
advanced shoal monitoring andforecasting system
Assignment from Dutch government
Cooperation with MARIN and otherparties
aim: optimise use of transport capacities
based on:
echo sounders on ships
data acquisition/processing system
forecast models
> low water (hydrological)
> bed topography (morphological)
data-assimilation techniques forreal-time navigability forecasts(water depth maps)
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Examples from Coastal Engineering
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Monaco land reclamation
wave conditions flow conditions ship manoeuvring edge structures beach impact
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water quality Dubai: influence of breakwater
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Nautical safety and accessibility Port of Rotterdam
3D flow modelling Maasvlakte 2 procedure for nautical evaluation of cross
currents and gradients along entrance channel
during different stages of construction: provideinformation of the present current information to
pilots (FEWS-viewer)
Depthaveragedcrosscurrent(m/s)
Distance along Maas Channel centre line (m)
Distance along Maas Channel centre line (m)
Crosscurrentgradient(m/s/km)
Depthaveragedcrosscurrent(m/s)
Distance along Maas Channel centre line (m)
Depthaveragedcrosscurrent(m/s)
Distance along Maas Channel centre line (m)
Distance along Maas Channel centre line (m)
Crosscurrentgradient(m/s/km)
Distance along Maas Channel centre line (m)
Crosscurrentgradient(m/s/km)
Distance along Maas Channel centre line (m)
Crosscurrentgradient(m/s/km)
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Design sea defence Maasvlakte 2
pebble beach combined with (partly)submerged berm/dam of blocks
1:10000 year design storm
verify design
provide recommendations for the design
attention to feasibility
scale model tests on different scales
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Deltares-scope:
modelling of waves and currents
- determine design conditions
modelling of coastline development
- determine impact on surrounding coast
setup measurement campaign
- calibrate models
develop prediction tool
- estimate downtime of facilities LNG_mooring_Sohar
Port development Port of Sohar, Oman
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Sand Engine (Building with Nature)
Field data Hindcast simulation
evaluate alternative designs
optimise monitoring program
determine workability
Cooperation between contractor
consortium and Deltares
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Breakwater Lugar de Baixo
Repair breakwater required after damage Wave climate study
2D en 3D scale model tests
Specialist advice
design alternatives
wave forces rubble mound stability
scouring
Marina of
Lugar de
Baixo
1 km
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EIA: Shuweihat S3 power and desalination plant
Marine impact assessment
expansion of plant:
Detail modelling of outfall plume
dispersion (hydrodynamics) Water quality modelling
modelling of ecological impacts (habitat)
On-the-job training of local engineers
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Stability pipeline protection Ichthys gas field (Au.)
stone protection on top of gas pipe between offshore gas fieldand the port of Darwin, Australia
protect pipe against anchors, remain stable under cycloneconditions (1/200 year)
tests in wave basin (Atlantic Basin, scale 1:17.5 to 1:22.5)
tests in geo-centrifuge (scale 1:80, so at 80g) to simulatepulling the anchor through the rock
aim is to optimised the required amount of stone to be usedbig construction savings
anchor drag testing model in geocentrifuge
movie
rock berm models in
Atlantic Basin
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JIP OSCARJoint Industry Project Offshore SCour And Remedial measures
background instability of foundations platforms, piles
lack of prediction tools
Approach
co-operate with companies systematic scale model work
develop design formulae
Product
Engineering software OSCAR the scour manager
Application (Operational) prediction of scouring
design of bottom protection for oil & gas industry,
offshore wind mills
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Danieli outfall plumes/ Al Gurm dredge plumes
Detail modelling (near and far field) of dispersion
of an industrial outfall plume to optimise the
design of the intake and outfall and to minimise
impacts on the environment
animation
Detail modelling dispersion of sediment plumes of
different dredging works to determine impact on
environment
W d lli Gib lt
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Wave modelling Gibraltar
Evaluation of marina layouts
Determine boundary conditions of breakwaters
Reference Alternative A Alternative B
Spain
Spain
S
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Port layout design Almeria (south coast Spain)
Master Plan for large container port on reclaimed area, Mediterranean Sea: moored ship measurements in scale model to determine downtime
update design to optimise conditions
T l i d il
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Two examples in more detail
1. installing caisson break water elements in Gijon (Spain)
2. exit transits of Astute-class submarines, Barrow-in-Furness (UK)
(both cooperations between Deltares and MARIN)
C t ti f Gij i b k t
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Construction of Gijon caisson breakwater
outer break water to be constructed 30 caissons, 50m length each
placed on bed of rocks
problem: local wave climateonly allows 40 working days a year
(for assumed workability limit,
Hs = 0.8 m, Tp = 8s)
construction time over 2 years,
too long, too costly
Aim: perform detailed study to widen
workability window by determining
workability limit in detail
O ti f th ti
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Options for the operations
Construction of scale model tests of placing procedure
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Construction of scale model tests of placing procedure
Construction of scale model tests of placing procedure
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Construction of scale model tests of placing procedure
Scale model tests of placing procedure
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Scale model tests of placing procedure
Construction of Gijon caisson breakwater
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Construction of Gijon caisson breakwater
result: optimised layout of mooring lines and fendering
all caissons placed within 1.5 years
Channel study Astute Submarines UK
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Channel study, Astute Submarines, UK
New generation now under construction
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New generation now under construction
Astute-class submarines:
length appr. 100 m;
breadth appr. 11 m;
draught appr. 10 m;
large tidal range (8-10 m)
exit only possible during specific high waters
Field measurement campaign: water levels
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Field measurement campaign: water levels
tidelog water level recorder (as backup
to recently installed local system)
Field measurement campaign: currents
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Field measurement campaign: currents
ADCP
position from GPS
Flow modelling
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Flow modelling
Delft3D-FLOW
HLES Large Eddy Simulation
very detailed and accurate flow
fields
measured conditions for verification
and calibration of flow model
60 output locations
Wave modelling
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Wave modelling
SWAN
input from offshore grid point of
UKMO, operational wave model,forecast location on day of exit
database of simulations, covering all
possible conditions offshore
provide translation of (forecasted)
offshore wave conditions to output
locations along the channel
same output locations were used in the
flow modelling
Hs
Channel depth study
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Channel depth study
aims: verify depth is suitable for Astute Class submarines
make weather windows with combinations of allowableconditions
deterministic elements:
draught
squat
trim
statistical (Poisson) approach for motions in waves (heave and
pitch)
conclusion: depth existing channel is suitable for Astute(reference design conditions, NSC)
Elements in required depth
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eme ts equ ed dept
manoeuvring
margin
siltation buffer
survey accuracy
allowance for squat
buffer for motions
reference level
tidal benefitdraught
Nautical Depth level
Design Depth level
Navigation Depth level
allowance for trim
Wave conditions to vessel motions
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Weather windows
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existing channel allows for a range of combinations of: high water
level, sea waves (Hs, Tp, dir), swell waves (Hs, Tp, dir)
weather windows: booklet of combinations, in the form of a lookup
table for the day of the exit
for given set of conditions, weather windows indicate maximumallowable Hsand Tpof sea waves
illustration of use of weather windows: first exit in Astute series,
the Astute on 15 November 2009
(HW 8.9 m + CD, 10:02 AM at Dock Door)
Weather forecasts
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on-site forecast by UKMO meteorologist on the 14th, 12:00 UTC:
series of passing low pressure systems
15th November would provide gap between low pressure systems
conditions on the 16th were forecasted to be very unfavourable
based on forecasts preference for 15th November
14 November 2009
12:00 UTC (analysis)
15 November 2009
12:00 UTC (forecast)
Wave forecasts and channel depth review
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p
feasible62.551.618012-130.3-0.4
210/240
0.1507:3015
feasible62.541.518012-130.3-0.4
210/240
0.1718:0014
feasible62.551.32107 - 80.8210/240
0.1415:1514
feasible62.551.51807 - 81.02400.1410:1514
conclusion
on exit
feasibility
critical
sea
period
(s)
critical
sea
height
(m)
sea
period
(s)
sea
height
(m)
sea
dir ()
swell
period
(s)
swell
height
(m)
swell
dir ()
surge
(m)
time of
forecast
(h)
date
(Nov)
Pictures of exit, 15-11-2009
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Pictures of exit, 15-11-2009
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+ movie clip
conditions on 16th, proved to be up to: Hs= 3 m,
Tp= 9 s unfeasible/unsafe situation
appropriate timing of manoeuvre
Concluding remarks
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wide range of hydraulic engineering topics covered by Deltares
hydraulic engineering projects @ Deltares for consultancy work
and research
practical questions practical + high-quality answers
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