geology: 3D space meets time - Geospatial World Forum

geology: 3D space meets time

Michiel van der Meulen, Erik Simmelink, Jan Stafleu, Ronald Vernes, Jan

Gunnink, Geomodelling Teams

Geological Survey of the Netherlands

what is a geological survey?

10 januari 2011

M Bouman

TNO Nieuwe huisstijl

1

keywords

public organisation

systematic investigation of a country’s subsurface

identification of geo-resources and geo-hazards

repository of subsurface data and information

why subsurface data and information?

we live on top of the subsurface

relying on its resources

depending on its properties

coping with its processes

changing it in several ways

often unconscious of these facts

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M Bouman


3D, 4D, 5D?

architecture and properties = 3D C

+ processes = 4D F

5D? I

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presentation contents

(geology of) the Netherlands: quick facts

3D geomodelling: where do we stand?

energy, water, built environment

dissemination

collaboration

trends, enabling factors, perspective

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M Bouman


(geology of) the Netherlands

small European country

high population density

high land use intensity

high degree of urbanisation

60% coastal and fluvial lowlands

earth resources

energy

groundwater

construction materials

salt, silica sand

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M Bouman


A

B

(geology of) the Netherlands

small European country

high population density

high land use intensity

high degree of urbanisation

60% coastal and fluvial lowlands

challenges

water

lowlands, subsidence

ground conditions

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M Bouman


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lowlands ‘up’lands


geoscientific data, information and knowledge for

management of earth resources

safe living on subsiding lowlands

reduction of risks and costs associated with ground conditions

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core asset: DINO (national repository)

borehole data

geophysical and geochemical data

models (interpretations predictions)

national coverage, high data density

own and third-party data

standardized

freely accessible

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Base Zechstein Group (Upper Permian, 270 Ma bp)

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Base Triassic (250 Ma)

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Base Jurassic (200 Ma)

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Base Cretaceous (146 Ma)

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Base Tertiary (65 Ma)

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Base Neogene (23 Ma)

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layer models

limits to representation possibilities

especially for the Holocene

(complexity, data density)

voxel models

Utrecht

Amsterdam

Rotterdam

the delta unveiled

Dutch mountains? (geology)

Utrecht

Dutch mountains? (properties)

Utrecht

geomodelling in the Netherlands

layer and voxel models

predictions of the architecture and properties of the subsurface

application-oriented

systematic production, national coverage

2D maps (arbitrary) derived products

drivers / applications

traditionally: hydrocarbon and groundwater resources

new: built environment, sustainable geo-energy, underground storage

delivering a 1990s roadmap (‘towards property predictions in 3D’)

state of the art, however …

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M Bouman


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1945

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Geological Survey

of the Netherlands

2010

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geomodelling in the built environment?

geotechnical applications

environmental issues

resolution high enough?

enough predictive value?

not, e.g., for

made ground

scale of individual buildings

and not including

underground constructions

cables, wires, pipelines

North Sea

Rotterdam

The Hague

Amsterdam

Utrecht

Rotterdam

The Hague

Amsterdam

Utrecht

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RandstadRail (lithology) N Z

RandstadRail (lithology) N Z

clay and loam

peat

fine sand

medium sand

coarse sand

anthropogenic & undifferentiated

High resolution pilot study using more data

GeoTOP (100 x 100 x 0,5 m): anytime, anyplace

enhanced resolution (20 x 20 x 0.5 m): custom made

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M Bouman


above-ground information

the urban environment is a detailed one!

step change

CityGML (3D info)

towards 3D urban planning

surface + subsurface

how to combine these evolving domains?

object-oriented vs. voxelised

buildings sitting on placemats

subsurface + surface information

technical issues will be resolved

thinking needs to be aligned system approach

when more detail is requested

not a matter of more computer power

but of more data! (including other data)

new development: key register for the subsurface

key-register for the subsurface (BRO)

Survey database to become part of the Dutch e-Government

by law, government bodies will have to feed and consult our database

“single acquisition and storage, multiple use”

data and models

operational in 2014/2015

more use by more users

higher expectations

accountability, reproducibility

detail, resolution

reliability, credibility

perspective (short to medium term)

data and use: concentrated in cities

better characterisations of made ground

including underground infrastructure?

delivering information for 3D planning

3D 4D (processes, predictions in timespace)

subsidence P

human effects P

groundwater flow P

sediment dynamics

conclusions

systematic geoscience modelling in the Netherlands:

over 2 decades of direct investment / experience

in providing 3D info

highly automated, but more than pushing buttons

late 1990s roadmap almost delivered

a new one features, amongst others:

the built environment

4D (systematically)

how to implement 5D? (PS scale is an issue!)

geology: 3D space meets time - Geospatial World Forum

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