July 21, 2014

Deltares & Offshore Wind Energy

Jan-Joost Schouten

Senior Project Manager Offshore

Deltares

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Deltares movie

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Independent institute

Deltares is an independent institute that provides a high standard of expertise and advice.We work closely with governments, businesses, universities and research institutes in The Netherlands and abroad.

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Mission Statement

Developing and applying top level expertise in the area of water, subsurface and infrastructure for people, planet and prosperity.

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Facts and figures

• Legal form: foundation under Dutch law• 840 employees• Annual turnover 113 mln euro• Locations in Delft and Utrecht• Nationally and internationally active• Unique experimental facilities

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Sharing knowledge

• (Open source) software • Publications, data and models• Deltares Academy, workshops, conferences• (Research) projects• PhD-students, trainees, graduates

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Excellent expertise

1000039.005

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Organization chart

•Environmental legislation & marine spatial planning•Ecological impacts & risks•Hydrodynamic & morphological impacts

•Environmental legislation•Marine spatial planning

•Metocean (design) conditions•Wave impact and wave runup•Hydrodynamic & morphological impacts•Scour and morphology•Seabed morphodynamics

•Geotechnics of foundations and cables•Seabed morphodynamics

Organization chart & Offshore Wind

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Deltares capabilities in offshore wind

•Metocean conditions

•Scour and morphology

•Geotechnics

•Seabed morphodynamics

•Marine spatial planning & environmental legislation

•Ecological impacts & risks

•Hydrodynamic & morphological impacts

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Deltares capability metocean

•Metocean> Normal and extreme conditions> Data analysis tool - ORCA

> Statistics for the design basis> Numerical modelling of waves,

currents and water levels

> Weather window analysis for marine installations

> Operational forecasting & logistics

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Deltares capability Scour 1

•Offshore scour> Scour prediction

> Conceptual layout of scour protection> Optimisation by physical modelling > Evaluation of field data

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Deltares capability Scour 2

•Example of physical model test: transparent pile with camera

before

after

current

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Deltares capability Scour 3/3

•Systematic scour research> Example: JIP OSCAR> Objective: investigate scour at jack-up foundations> Systematic physical model tests for three spudcan types> Test database → scour formulae → software> PC tool OSCAR the scour manager

– Scour assessments / forecasting– Design of scour protection

> Field validation

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Deltares capability geo engineering 1/2

• Geotechnics• Site investigation and laboratory testing (speciality

cyclic loading)

• Foundation design (e.g. monopiles, GBS, suction piles)

• Installation (e.g. spudcan penetration, boring process)

• Geohazards (e.g. earthquake)• Tools:

> Geotechnical centrifuge

> Numerical models> Own software (e.g. D-Pile & D-Cycle)

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Deltares capability geo engineering 2/2

• Cables• Trenching

• Rock protection (anchors & fishing equipment)• Shore connection (horizontal directional drilling)

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Deltares capability engineering geology

• Sea bed morphodynamics• Analysis of sea bed morphodynamics

• Morphodynamics• Offshore geophysical surveys• Monitoring using Fiber-optic cables

• R&D• Research on numerical tool Delft3D

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Marine bedformsObj. 1:Morfodynamiek

bathymetrie NCP

zandbanken

zandgolven

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DTS: Monitoring sediment transport

1. Continuous monitoring of erosion and deposition with temperature measurements (Kornwerderzand)

2. The aquifer thermal energy storage project (Utrecht)3. Sand suppletion, offshore Workum (Friesland)

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•Sand suppletion, offshore Workum (Friesland)•Fiber-optic DTS (Digital Temperature Sensing)•Temperature measurements <0.1ºC resolution, spatial resolution <1 meter

DTS: Monitoring morphodynamics I

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•The fibre-optic DTS measurements clearly reflect the position of the nourishment and sandbars•changes in morphology of the nourishment can be deduced from the temperature signal

DTS: Monitoring morphodynamics II

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Deltares capability summary

Conclusions:• Wide range of applications to support the industry • (inter)national consultancy & research projects• Identification of research topics• Joint Industry Projects

• EU projects• Policy: dare to share

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Deltares capability

• Environmental legislation & marine spatial planning

• Ecological impacts & risks

• Hydrodynamic & morphological impacts

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Deltares capability Scour IV

•Scour protection alternatives> Loose rock> Block mattresses

> Frond mats> Collars> Rubber mats

rubber mat collar

artificial fronds

block mattresses

loose rock

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Processing of scour development

0

2

4

6

8

10

12

14

0 1000 2000 3000 4000 5000 6000 7000 8000

time [s]

scou

r de

pth

[cm

] Tchar

S/Seq=63%

tend

• Seq = equilibrium scour depth

• Tchar = characteristic time scale

• t0 = time delay (collar tests)sand-water interface

pile

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Deltares capability Offshore Wind

•Metocean

•Scour and morphology

•Wave runup

•Geotechnics

•Seabed morphodynamics

•Environmental legislation & marine spatial planning

•Ecological impacts & risks

•Hydrodynamic & morphological impacts

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Metocean Database ADMA-OPCO

Metocean database

• for the oil fields offshore Abu Dhabi • for design and planning offshore activities• includes all relevant metocean parameters • both normal and extreme conditions

(waves, wind, current, water levels)