marijn de jong, deltares

8/2/2019 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)


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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Scale model tests of placing procedure


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Scale model tests of placing procedure



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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

marijn de jong, deltares

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